Process and apparatus for capturing gaseous ammonia
09993770 ยท 2018-06-12
Inventors
- DIRK ANDREWS (APTOS, CA, US)
- RANDOL E. KIRK (ALBUQUERQUE, NM, US)
- DANIEL F. GORZEN (YPSILANTI, MI, US)
Cpc classification
A01K1/0047
HUMAN NECESSITIES
C01C1/242
CHEMISTRY; METALLURGY
International classification
C01C1/242
CHEMISTRY; METALLURGY
Abstract
A method and system for collecting gaseous nitrogen compounds into an aqueous solution are provided. The method enables the combination of gaseous sulfur and nitrogen compounds in the aqueous solution to generate ammonium compound components, to include ammonium sulfate. Sulfur may be pressure injected into the solution as gaseous sulfur dioxide. Optionally, carbon may be introduced into the solution as gaseous carbon dioxide. The sulfur may be earlier sourced by a burning of a sulfurous solid. The pH of the solution may be monitored and the introduction of ammonia, carbon and/or sulfur may be halted or constrained while the pH of the solution is measured outside of specified range. The solution may be allowed to age to permit a mix of compounds of ammonium carbonate, ammonium bicarbonate and ammonium carbomate to restabilize and thereby encourage a renewed surge of ammonium sulfate generation.
Claims
1. A method comprising: a. forming a volume of fluid water; b. burning sulfur in the presence of oxygen to form sulfur dioxide; c. exposing the volume of fluid water to the sulfur dioxide, whereby the volume of fluid water is transformed into an aqueous solution having a pH below 5; d. exposing the aqueous solution to an atmospheric gas volume comprising a volume of gaseous ammonia, wherein the volume of gaseous ammonia is at least partially generated from bacteria comprised within a biomass of mammalian dung or avian feces; and e. removing a component of the aqueous solution from the aqueous solution, the component comprising nitrogen compounds.
2. The method of claim 1, wherein the component comprises ammonium sulfate.
3. The method of claim 1, wherein the component is removed from the aqueous solution in a solution comprising a portion of the aqueous solution.
4. The method of claim 1, further comprising: f. continuing to expose the aqueous solution to the sulfur dioxide until a pH measurement of the aqueous solution of approximately four is generated; and g. halting the exposure of the sulfur dioxide until a pH measurement of the aqueous solution of approximately five is generated; and h. resuming exposure of the aqueous solution to the sulfur dioxide until a pH measurement of the aqueous solution of approximately four is again generated.
5. The method of claim 1, further comprising enclosing a source volume of atmosphere at approximately standard atmospheric pressure, the source volume of atmosphere additionally comprising gaseous ammonia from which the gaseous ammonia introduced into the aqueous solution is sourced.
6. The method of claim 1, wherein the volume of gaseous ammonia includes molecules of NH3 and molecules of NH4+.
7. The method of claim 1, wherein the volume gaseous ammonia is at least partially generated from mammalian dung or avian feces.
8. The method of claim 1, wherein the gaseous sulfur dioxide is pressure injected into the volume of fluid water to form the aqueous solution.
9. A method comprising: a. collecting an organic waste mass containing ammonium, the waste mass comprising bacteria, wherein the bacteria generate a volume of gaseous ammonia; b. forming a volume of fluid water; c. burning sulfur in the presence of oxygen to form sulfur dioxide; d. exposing the volume of fluid water to the sulfur dioxide, whereby the volume of fluid water is transformed into an aqueous solution having a pH below 5; e. exposing the aqueous solution to the gaseous ammonia; and f. removing a resultant component comprising a nitrogen compound from the aqueous solution.
10. The method of claim 9, wherein the resultant component comprises ammonium sulfate.
11. The method of claim 9, wherein the resultant component is at least partially removed from the aqueous solution in combination with a portion of the aqueous solution.
12. The method of claim 9, further comprising aerating the waste mass by mechanical disturbance, whereby a rate of generation of gaseous ammonia by the bacteria is increased.
13. The method of claim 12, wherein the aeration of the organic waste comprises mechanical disturbance.
14. The method of claim 9, further comprising enclosing the waste mass, whereby the gaseous ammonia is collected prior to introduction of the gaseous ammonia into the fluid water.
15. The method of claim 11, further comprising substantively removing the component from the volume fluid water while simultaneously introducing additional gaseous ammonia and additional gaseous sulfur dioxide into the volume of fluid water.
16. A system comprising: a. a volume of fluid water; b. a sulfur burner module, the sulfur burner module adapted to form sulfur dioxide by a sustained ignition of sulfur; c. means to inject the sulfur dioxide into the volume of fluid water, whereby the sulfur dioxide and the volume of fluid water form an acidic aqueous solution; d. means to expose a gaseous volume comprising a volume of gaseous ammonia to the acidic aqueous solution, whereby the acidic aqueous solution absorbs ammonia, and wherein the volume of gaseous ammonia is at least partially generated from bacteria comprised within a biomass of mammalian dung or avian feces; and e. means to remove a resultant component from the aqueous solution.
17. The system of claim 16, further comprising an enclosure, the enclosure adapted to substantively contain the gaseous volume.
18. The system of claim 16, wherein the means to remove the resultant component from the aqueous solution comprises a reverse osmosis apparatus.
19. The system of claim 16, wherein the means to remove the resultant component from the aqueous solution comprises an electro-dialysis apparatus.
20. The system of claim 16, wherein resultant component comprises ammonium sulfate.
Description
BRIEF DESCRIPTION OF THE DRAWINGS
(1) These, and further features of the invention, may be better understood with reference to the accompanying specification and drawings depicting the preferred embodiment, in which:
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DETAILED DESCRIPTION OF THE INVENTION
(26) It is to be understood that this invention is not limited to particular aspects of the present invention described, as such may, of course, vary. It is also to be understood that the terminology used herein is for the purpose of describing particular aspects only, and is not intended to be limiting, since the scope of the present invention will be limited only by the appended claims.
(27) Methods recited herein may be carried out in any order of the recited events which is logically possible, as well as the recited order of events.
(28) Where a range of values is provided herein, it is understood that each intervening value, to the tenth of the unit of the lower limit unless the context clearly dictates otherwise, between the upper and lower limit of that range and any other stated or intervening value in that stated range, is encompassed within the invention. The upper and lower limits of these smaller ranges may independently be included in the smaller ranges and are also encompassed within the invention, subject to any specifically excluded limit in the stated range. Where the stated range includes one or both of the limits ranges excluding either or both of those included limits are also included in the invention.
(29) Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Although any methods and materials similar or equivalent to those described herein can also be used in the practice or testing of the present invention, the methods and materials are now described.
(30) It must be noted that as used herein and in the appended claims, the singular forms a, an, and the include plural referents unless the context clearly dictates otherwise. It is further noted that the claims may be drafted to exclude any optional element. As such, this statement is intended to serve as antecedent basis for use of such exclusive terminology as solely, only and the like in connection with the recitation of claim elements, or use of a negative limitation.
(31) It will be appreciated that terms such as front, back, top, bottom, left, right, horizontally, up, down, and side used herein are merely for ease of description and refer to the orientation of the components as shown in the figures. It is to be understood that any orientation of the apparatus, and the components thereof described herein, is within the scope of the present invention.
(32) In a preferred embodiment, the term organic as used herein is a labeling certification term that refers to an agriculture product produced in accordance with the Code of Federal Regulations (CFR) Title 7 (Subtitle B, Chapter I, Subchapter M, Part 205). As used hereinafter, organic ammonium sulfate is interchangeable with ammonium sulfate, organic ammonium sulfate product, and/or product. As used herein, plurality means one or more.
(33) Referring now generally to the Figures and particularly to
(34) The water volume 104 is then acidified in step 1.04 by introduction of the sulfur dioxide 110 to form an acidic aqueous solution 112, as indicated in
(35) The acidic aqueous solution 112 is then exposed to the source ammonia gas 102, and optionally carbon dioxide, in step 1.06, wherein portions of the source ammonia gas 102, and optionally gaseous carbon dioxide, is absorbed by the aqueous solution 112 in step 1.06. It is understood that the source ammonia gas may 102 may be comprised within an enclosed atmospheric gas 114 that includes other atomic and molecular components, such as carbon dioxide, and that the acidic aqueous solution 112 may absorb carbon dioxide and additional molecules and free atoms from the enclosed atmospheric gas 114 in step 1.06. It is further understood that the enclosed atmospheric gas 114 may be formed by adding ammonia, carbon dioxide and other products of bacteria acting on organic waste, e.g., dung or feces, to a pre-existing ambient atmosphere.
(36) Precipitates, other solutes and/or certain non-aqueous components of the aqueous solution 112, e.g., ammonium sulfate, are concentrated and collected by circulation through a collection module 116 in step 1.08 to form an output solution 128 that is held in a holding tank 130 for removal from the first system 100, and the pH of the aqueous solution 112 is monitored in step 1.10. When a pH measurement of greater than 5.0 is determined in step 1.12, the rate of volumetric exposure of the gaseous sulfur dioxide 110 is increased in step 1.14, and when a pH measurement of lower than 4.0 is determined in step 1.16, the rate of volumetric exposure of the gaseous sulfur dioxide 111 is decreased in step 1.80
(37) It is understood that the aqueous solution 112 is preferably substantively and continuously exposed to gaseous sulfur dioxide 110 in steps 1.06 through 1.18 albeit possibly at varying rates of volumetric exposure to the sulfur dioxide gas 110 is increased in step 1.14. It is further understood that the absorption of the source ammonia gas 102 indicated in step 1.06 and the collection of solutes and non-aqueous components of the aqueous solution of step 1.08 are preferably continuously and contemporaneously occurring during the instantiation of the loop of steps 1.06-1.18.
(38) An operator or an automated control system 118 may act and/or elect to stop the process loop of steps 1.02 through 1.18 in step 1.20 whereby the burning of the sulfur mass 106 and the processes of steps 1.04 through 1.18 are halted are minimized.
(39) Referring now generally to the Figures and particularly to
(40) It is also understood that the first system 100 may include commercially available equipment or their equivalents, wherein the ammonia scrubber 122 may be or comprise, or be comprised within, a wet flue gas scrubber marketed by Deryck A Gibson Ltd. of Kingston Jamaica. In various alternate preferred embodiments of the present invention, the acidified aqueous solution 112 may presented to the source ammonia gas 102 within the ammonia scrubber 122 as a mist, a spray or a waterfall as the aqueous solution 112 is circulated through the ammonia scrubber 122. The reaction chamber 124 may comprise sheets, walls, a bottom wall and or/ceiling wall of polyvinyl chloride or other suitable material known in the art.
(41) The sulfur dioxide module 126 may be or comprise, or be comprised within, a sulfur dioxide burner system as marketed by Harmon Systems International, LLC of Bakersfield, Calif., whereby the sulfur dioxide gas 110 may be generated and commingled with water volume 104 that is circulated through the sulfur dioxide module 126. It is understood that the Harmon sulfur dioxide burner system oxidizes sulfur 106 into sulfur dioxide gas 110 by burning the elemental sulfur 106 with a propane torch in the presence of a pressurized circulating portion of the water volume 104 and air containing oxygen 108. The sulfur dioxide gas 110 is combined with the water volume 104 to produce sulfurous acid, or H2SO3, within the aqueous solution 112
(42) In addition, the RO/ED module 116 may be or comprise, or be comprised within, a reverse osmosis/electro dialysis system as marketed by Ameridia Corporation of Moerdjik, Netherlands.
(43) A control module 200 of the first system 100 generates and communicates commands to direct the activity, and provides electrical power that enables the functioning, of the first system 100 in the removal gaseous ammonia and the generation of resultant chemical compounds and precipitates e.g., ammonium sulfate. A communications and power bus 132 of the control module 118 enables the control module 118 to send and receive commands and data within the first system 100 and selectively and controllably provide power to other modules 116 122, 126, supply fans SF01, supply pumps SP01-SP04, motorized fluid return pumps R01-R03, and an output pump OP01.
(44) Referring now generally to the Figures and particularly to
(45) Referring now generally to the Figures and particularly to
(46) The aqueous solution 112 passes through the source ammonia gas 112 and falls by gravity into a scrubber tank 152. A first aeration fixture 146 releases the aqueous solution 112 within the ammonia scrubber 122 as a sheet of fluid. A second aeration fixture 148 is a showerhead that releases the aqueous solution 112 into the source ammonia gas 102 as a fine water mist. A third aeration fixture 150 is a showerhead that releases the aqueous solution 112 into the source ammonia gas 102 as water droplets.
(47) A first motorized fluid return pump SP01 as energized by the scrubber system control module 142 and/or the control system 118 pumps the aqueous solution 112 captured by the scrubber tank 152 through additional tubing 144 and thereby returns the aqueous solution 112 to the reaction chamber 124. An optional first supply fan SF01 as energized by the scrubber system control module 142 and/or the control system 118 propels or drives the source ammonia gas 102 and the enclosed atmospheric gas 114 from the enclosure 120 and into the ammonia scrubber 122 through a length of tubing 144. The scrubber tank 152 may comprise sheets, walls, a bottom wall and/or ceiling wall of polyvinyl chloride or other suitable material known in the art.
(48) It is understood that the ammonia scrubber 122 may be or comprise a suitable and commercially available gas scrubber known in the art, and that the source fan SF01, the first motorized fluid supply pump SP01 and/or the first motorized fluid return pump RP01 may be comprised within the ammonia scrubber 122. It is further understood that the tubing 144 may be or comprise polyvinyl chloride piping or other suitable and preferably substantively chemically inert material known in the art.
(49) Referring now generally to the Figures and particularly to
(50) An SO2 module interface 162 is disposed between, and bi-directionally communicatively coupled with both of, the control system 118 and the SO2 module controller 156. Bi-directional communications between the control module 200 and the SO2 module controller 156 are enabled by the communications and power bus 132 and the SO2 module interface 162, whereby commands and data may be communicated to and from the control module 200 and the SO2 module controller 156. Electrical power is also provided to the sulfur dioxide module 126 via the communications and power bus 132 and the SO2 module interface 162.
(51) Optionally and alternatively electrical power and/or commands are provided electronically controlled ignition device 161B by a communicative coupling of the electronically controlled ignition device 161B with the SO2 module controller 156 and/or the power and communications bus 132 of the control system 118.
(52) It is understood that the sulfur module 126 may be or comprise a sulfur burner as marketed by Harmon Systems International, LLC of Bakersfield, Calif., or other suitable sulfur burner known in the art. It is further understood that the sulfur burner 126 may be or comprise a suitable and commercially available sulfur burner known in the art, and that the second motorized fluid supply pump SP02 and/or the second motorized fluid return pump RP02 may be comprised within the sulfur burner 126.
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(54) The RO/ED controller 168 is optionally bidirectionally communicatively coupled to the reverse osmosis module 164 and may provide required electrical power and control signals to the reverse osmosis module 164 that direct and enable the reverse osmosis module 164 to substantively extract water volume from the aqueous solution 122 by reverse osmosis. The RO/ED controller 168 is further optionally bidirectionally communicatively coupled to the electro-dialysis module 166 and may provide required electrical power and control signals to the electro-dialysis module 166 that direct and enable the electro-dialysis module 166 to substantively extract additional water volume from the aqueous solution 122 by electro dialysis. The aqueous solution 112 is delivered to the reverse osmosis module 164 by energizing the third motorized fluid supply pump SP03 via a length of tubing 144. After some water volume 104 is extracted from the aqueous solution 112 by the reverse osmosis module 164, the resultant aqueous solution 112 is delivered to the electro dialysis module 166 from the reverse osmosis module 164 by energizing the second motorized fluid output pump OP02. The RO/ED controller 168 is additionally optionally electrically coupled to the second motorized fluid output fluid pump OP02 and selectively provides electrical power to energize the second motorized fluid output fluid pump OP02 to enable transfer of the aqueous solution 112 from the reverse osmosis module 164 and to the electro dialysis module 166.
(55) The RO/ED controller 168 and/or the control module 200 may optionally or additionally be coupled to the third motorized fluid supply pump SP03 and/or the third motorized fluid return pump RP03 and selectively energize the third motorized fluid supply pump SP03 and/or the third motorized fluid return pump RP03 to enable a delivery of the aqueous solution 112 to the reverse osmosis module 164 and return of water volume 104 from the reverse osmosis module 164 to the reaction chamber 124. The RO/ED controller 168 and/or the control system 118 may further optionally or additionally be coupled to the fourth motorized fluid return pump RP04 and selectively energize the fourth motorized fluid return pump RP04 to enable a return of water volume 104 from the electro dialysis module 166 to the reaction chamber 124. The RO/ED controller 168 and/or the control system 118 may further optionally or additionally be coupled to the first motorized fluid output pump OP01 and selectively energize the first motorized fluid output pump OP01 to enable transfer of the output solution 128 from the electro dialysis module 166 to the holding tank 130. The holding tank 130 may be or comprise one or more walls, floor wall, and/or ceiling comprising polyvinyl chloride or other suitable material known in the art.
(56) An optional or additional RO/ED tubing length 172 may couple the reverse osmosis module 164 and the fourth motorized fluid return fluid pump RP04 and may enable the fourth motorized fluid return fluid pump RP04 to drive water volume from both the reverse osmosis module 164 and the electro dialysis module 166 and into the reaction chamber 124. The RO/ED tubing length 172 may be or comprise perforated polyvinyl chloride piping and/or other suitable and substantively chemically inert material known in the art.
(57) Referring now generally to the Figures and particularly to
(58) In step 2.02 another command is sent from the control module 200 in step 2.04 to (a.) energize motorized fluid pumps SP02 & RP02 to circulate water volume 104 and (b.) inject the resultant sulfur dioxide gas 110 via the pressure column 158 into the water volume 104 to generate the aqueous solution 112. In step 2.06 the control module 200 accepts pH sensors SPh.01-SPh.N positioned within or proximate to the reaction chamber 124 to determine the pH of aqueous solution 112, and when the pH of the aqueous solution is not sensed to be greater than 4.0, the control system 118 directs the sulfur dioxide module 126 to simply continue inject sulfur dioxide 110 into the aqueous solution 112 until the aqueous solution 112 is measured by the pH sensors SPh.01-SPh.N to have exceeded a magnitude of approximately 4.0.
(59) When the control module 200 receives a pH reading in step 2.06 greater than 4.0 from the pH sensors SPh.01-SPh.N, the control module 600 proceeds on to step 2.08 and energizes the ammonia scrubber 122 in step 2.08, whereby the ammonia scrubber 122 circulates the aqueous solution 112 through the ammonia scrubber 112 and exposes the aqueous solution 112 to the source ammonia gas 112. In optional step 2.09 the control system 118 directs an optional carbon dioxide module 202, as further disclosed in reference to
(60) The control module 600 directs the RO/ED module 116 in step 2.10 to circulate the aqueous solution 112 through the RO/ED module 116 and to generate an output solution 128 for storage in the output holding tank 130.
(61) In step 2.12 the control module 600 determines whether to continue the process of step 2.04 through 2.10, whereby portions of the aqueous solution are substantively continuously and contemporaneously circulated to and from the reaction chamber 124 and (a.) the sulfur dioxide module 126 to receive sulfur dioxide; (b.) the ammonia scrubber 122 to absorb source ammonia gas 102; and (c.) the RO/ED module 116 to filter out components, e.g., ammonium sulfate; and to generate the output solution 128. It is understood that the output solution contains (a.) a portion of the water volume 104 and (b.) one or more non-aqueous components of the aqueous solution 112 that have been separated from the aqueous solution 112 by the RO/ED module 116. The control module 200 might, for example, be programmed to proceed to step 2.13 and to shut down the first system 100 or the second system 136 when an ammonia gas detector SA01 sends a measurement that indicates that that the concentration of the source ammonia gas 102 within the atmospheric gas 114 within the enclosure 120 is less than a pre-specified amount, e.g., less than one parts per million per volume unit.
(62) In the alternative, in step 2.12 a human operator may direct the control system via an input module 202 to cease operations and proceed to step 213 and to shut down the first system 100 or the second system 200.
(63) The control system 118, in accordance with its structure, inputs and programming, may proceed from step 2.12 and to execute the loop of steps 2.14 through 2.28, whereby the control system 118 directs the first system 100 or the second system 136 to maintain a pH of the aqueous solution 112 approximately within a preferred range, such as approximately within the range of from 4.0 to 5.0 plus or minus five percent.
(64) When the control module 200 determines in step 2.14 that the pH of the aqueous solution 112 is measured to be greater than 5.0, the control system 118 proceeds on to step 2.16 and pause the activity of the ammonia scrubber 122 in circulating and exposing aqueous solution 112 for absorption of ammonia gas 102 and in step 2.18 directs the sulfur dioxide module 126 to increase the rate of introduction of sulfur dioxide 110 into the aqueous solution 110. An optional wait step 2.20 imposes a wait state of a predetermined time, and in step 2.22 the control system 118 directs the ammonia scrubber 122 to resume circulating aqueous solution 112 and causing absorption of the source ammonia gas 102 into the aqueous. The control system 118 directs the sulfur dioxide module 126 to resume a preprogrammed or pre-specified standard rate of introduction of sulfur dioxide 110 into the aqueous solution.
(65) In the alternative, when the control module 200 determines in step 2.14 that the pH of the aqueous solution 112 is not measured to be greater than 5.0, the control system 118 proceeds on to step 2.26 and to determine if that the pH of the aqueous solution 112 is measured to be less than 4.0. When the control system 118 to determines in step 2.26 that the pH of the aqueous solution 112 is measured to be less than 4.0, the control system 118 directs the sulfur dioxide module 126 to decrease the rate of introduction of sulfur dioxide 110 into the aqueous solution 110 to a certain pre-specified or preprogrammed rate of introduction of sulfur dioxide 110 into the aqueous solution 110. The control module 200 proceeds from either step 2.26 or step 2.28 to step 2.12.
(66) It is understood that alternative control methods to implement the invented method are made obvious to one of ordinary skill in the art in light of the present invention. In certain alternate preferred methods of the present invention, manual control, material input and/or material output may be applied, effected or enabled by a human operator to engage, disengage, turn on and/or turn-off one or more modules 116, 122 & 126, the source fan SF01, one or more motorized fluid pumps OP01, OP02, SP01-SP03 & RP01-RP04.
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(70) An agitator motor controller 508 is electrically coupled with both the agitator motor 506 and the power and communications bus 132 and receives electrical power to energize the agitator motor 506 via the power and communications bus 132, wherein the control system 118 selectively and controllably delivers electrical power to the agitator motor 506. Additionally, alternatively or optionally, the agitator motor 506, the tilling blade 504 and the agitator motor controller 508 may be or be comprised within an automated COMPOST-A-MATIC in-vessel composting system as marketed by Farmer Automatic of America, Inc. of Register, Ga. or other suitable motorized or automated tilling system known in the art. It is understood that the agitator module 138 may optionally or alternatively be or comprise an isolated stand-alone system that is not coupled with the power and communications bus 132 and receives an independent feed of electrical power.
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(72) The control module 200 may optionally or additionally be coupled with the agitator motor controller 504 and/or the agitator pump controller 406. The control module 200 may be further optionally or additionally be coupled with a carbon dioxide valve controller 608 of the carbon dioxide source module 202 of the second system 136, and as further disclosed in reference to
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(76) Referring now generally to the Figures and particularly to
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(79) Referring now generally to the Figures and particularly to
(80) More particularly
(81) The ammonium gas 15A and/or atmospheric gases 15B are optionally passed through an ammonium gas scrubber 15C in optional step 14.06. The ammonium gas 15A is delivered in step 14.08 into a reaction chamber 15D, and/or optionally as a component of the mixture of atmospheric gases 15B of step 14.02 and/or as an output from the ammonium gas scrubber 15C. The ammonium gas 15A delivered into the reaction chamber 15D in step 14.08 is thereupon brought into contact with, and permitted to react with, the second reactant sulfur dioxide 15A in step 14.09, whereupon an output mass of ammonium sulfate 15F is formed. The mass of ammonium sulfate 15F is then transferred into a storage tank 15G in step 14.10 and made available for immediate use, or alternately collected and made available for later transport and use,
(82) Referring now to steps 14.12 through 14.20, a second reactant sulfur dioxide 15E is disclosed to be generated from one or a combination of sources. In optional step 14.12 a mass of elemental sulfur 15H is secured and thereupon is combusted in step 14.14 by means of a sulfur burning system 15I. In one optional variation of the present invention, the sulfur burning system 15I is or comprises an a sulfur dioxide burner system as marketed by Harmon Systems International, LLC of Bakers field, Calif., whereby the second reactant sulfur dioxide 15E is generated by combustion of the elemental sulfur 15H in optional step 14.16 by burning the elemental sulfur 15H with a propane torch (not shown) to generate a first mass of sulfur dioxide gas 15J containing the second reactant sulfur dioxide 15E.
(83) Alternatively or additionally, a second mass of gaseous sulfur 15K may be obtained and delivered in step 14.18. Further alternatively or additionally, a third mass of gaseous sulfur 15L may be extracted from a liquid mass 15M of a solution containing sulfur in step 14.20 by an extraction system 15P.
(84) The second reactant sulfur dioxide 15E as generated or obtained in steps 14.14-14.20 may optionally be transferred into the scrubber in optional step 14.21.
(85) The second reactant sulfur dioxide 15E as generated or obtained in steps 14.14-14.20 is transferred into the reaction chamber 15D in step 14.22 to enable reaction with the mass of ammonium gas 15A in step 14.10. It is understood that the second reactant sulfur dioxide 15E may be or comprise, in singularity or combination, the solid sulfur 15H of step 14.12, the first mass of sulfur dioxide gas 15J of step 14.16, the second mass of gaseous sulfur 15K of step 14.18, and/or the third mass of gaseous sulfur 15L of step 14.20.
(86) Referring now to the Figures and particularly to
(87) The source ammonium gas 15A is emitted from the organic source material biomass 16A containing ammonium and/or ammonium compounds. A first fan 150.1 is adapted to withdraw the source ammonia gas 15A into an ammonia scrubber module 15C. The ammonia scrubber module 15C and the reaction chamber 15D are connected via a circulation system and are both coupled to the sulfur source enclosure 120. A sulfur dioxide generation module, either the sulfur gas 15A & 15J-15L from elemental sulfur combustion of step 14.14 of the method of
(88) It is understood that the ammonia scrubber 15C may be or comprise a suitable and commercially available gas scrubber known in the art, and that the source fan may be comprised within the ammonia scrubber 15C. It is further understood that the tubing connecting the source nitrogen gas 15A and scrubber 15C may be or comprise polyvinyl chloride piping or other suitable and preferably substantively chemically inert material known in the art.
(89) The concentrated output solution may thus include ammonium sulfate as a solute or component, whereby ammonium sulfate is produced in a manner that is in conformance one or more governmental, regulatory or organizational standards and the resultant ammonium sulfate may receive a certification of a preferred or particular origin, such as a being certified, graded, trademarked or marked as a special type of organic sulfate. It is understood that the receipt of such certifications or authorizations may increase the market value and perceived quality of the resultant ammonium sulfate of the concentrated output solution.
(90) It is also understood that the system in
(91) As indicated in
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(93) Aerobic bacteria 16D are provided to highly selectively convert all or substantially all of the waste amino acids, proteins, uric acid and any other available nitrogen compounds in the biomass into NH3 and/or NH4 and CO2. Preferably, the specific strains of aerobic bacteria 16D used in the present invention include uricolytic bacteria such as Bacillus pasteurii and/or Peptostreptococcus anaerobius, Clostridium sticklandii, Clostridium aminophilum, and Eubacterium pyruvativorans. Thermophilic bacteria are preferred because their presence reduces the population of harmful bacteria such as E. coli, Salmonella and fecal coliform bacteria.
(94) As the composting process commences, a rototiller 16B may be used to mix/agitate and aerate the biomass. In a preferred embodiment, a hood may be used to capture rising water vapor and/or NH3 and/or NH4 and CO2 from the biomass 16A as it generates heat. An intake channel 16E delivers water vapor and/or NH3 and/or NH4 15A from the enclosure 120 and into the scrubber 15C.
(95) Referring now generally to the Figures and particularly to
(96) Referring to
(97) In a preferred embodiment, composting trench 1702 is from about 1 foot to about 10 feet deep; more preferably from about 2 feet to about 6 feet deep; and most preferably from about 4 feet to 5 feet deep. In a preferred embodiment, composting trench 1702 is from about 50 feet to about 500 feet long; more preferably from about 100 feet to about 350 feet long; and most preferably from about 200 to about 300 feet long. In a preferred embodiment, composting trench 1702 is from about 3 feet to about 25 feet wide; more preferably from about 5 feet to about 20 feet wide; and most preferably from about 8 feet to about 14 feet wide. In a preferred embodiment, the dimensions of composting trench 1702 are as follows: about 4 feet deep, about 250 feet long, and about 10 to about 12 feet wide. In other embodiments, composting trench 1702 may have dimensions greater than, less than, or different from those described above.
(98) In a preferred embodiment, composting trench 1702 is configured to hold from about 20 days to about 50 days of manure, and more preferably from about 25 days to about 30 days of manure. In other embodiments, composting trench 1702 is configured to hold less than about 20 days of manure or greater than about 50 days worth of manure. In a preferred embodiment, composting trench 1702 is configured such that the last few days of compost, preferably the last three days of compost, are covered. The cover captures gases that will be used for bioburden reduction and/or for killing the bacteria 16D as the composting process ceases.
(99) Referring to
(100) Referring to
(101) In a preferred embodiment, the temperature of the biomass does not exceed about 70 degree C. during the aerobic composting process according to present invention. Most preferably, the temperature of the biomass is kept between 50 degree C. and 70 degree C. In order to regulate the compost temperature, the heat generated by the aerobic composting process may be distributed as follows. For example, the aerobic composting process heats water in the pipes of heat conducting water system 1712. These pipes may distribute heat up and down composting trench 1702 by distributing hot water up and down composting trench 1702. For example, hot water may be sent to any part of composting trench 1702 via these pipes from a high temperature section of composting trench 1702.
(102) In a preferred embodiment, a hood may be used to capture rising water vapor and/or NH.sub.3 and/or NH.sub.4 and CO.sub.2 from the biomass as it generates heat. In yet other embodiments, in lieu of, or in addition to, using a hood to capture rising water vapor or NH.sub.3 and/or NH.sub.4 and CO.sub.2 at least a portion of the roof of composting building 1704 may also be used. Preferably, the roof of the composting building 1704 includes steep eaves or a narrowed roof area to allow a more efficient capture and removal of NH.sub.3 and/or NH.sub.4 and CO.sub.2 from inside composting building 1704.
(103) The present invention generally operates as follows. Manure is collected from a CAFOs facility on a continuing basis, as soon as feasible. Preferably, manure is collected from a CAFOs facility within 12 hours of production. The collected manure has a moisture content of about 70-80% by weight. A source of carbon is added, preferably at a ratio of manure to carbon source of about 3:2, resulting in a biomass with a moisture content of preferably about 30%-70% by weight. Most preferably, the resulting biomass has a moisture content of about 50% by weight. Preferably, the source of carbon is sawdust. Other sources of carbon may be used in lieu of, or in conjunction with, sawdust. In addition to providing a carbon source during the aerobic composting process, the nature of the carbon source may also provide porosity to the biomass, improving the speed and efficiency of the capture of composting gases.
(104) According to an embodiment of the invention, the floor of a CAFOs facility containing manure may be washed periodically, and the water and manure may be collected in a containment pool. The containment pool is preferably enclosed or shielded, such that the NH.sub.3 and CO.sub.2 gasses from the manure composting process cannot escape into the environment. The shielding or enclosure of the containment pool preferably contains a suitable air handling system manufactured to withstand the corrosion associated with NH.sub.3 and CO.sub.2 gases, which is used to collect the NH.sub.3 and CO.sub.2 gasses and to transfer the collected NH.sub.3 and CO.sub.2 gasses to one or more collection tank(s) 1801 which contain an aqueous solution. According to an embodiment of the invention, additional CO.sub.2 gasses may be collected from the atmosphere of the CAFOs facility by means of a suitable air handling system manufactured to withstand the corrosion associated with NH.sub.3 and CO.sub.2 gases. The CO.sub.2 gases collected from the atmosphere of the CAFOs facility are transferred via the air handling system to one or more collection tank(s) 1801.
(105) In a preferred embodiment, the source of carbon includes carbon to nitrogen in the ratio of at least about 6:1. In other embodiments, the volume/amount of manure and/or carbon source used in the input may vary, depending on, for example, the capacity of composting trench 1702. In yet other embodiments, the carbon to nitrogen ratio of the source of carbon may be less than about 6:1 or greater than about 6:1. In yet other embodiments, an additional source of carbon may not be added to the manure, and the manure alone may be used in the composting process of the present invention.
(106) Referring to
(107) Temperature, pH and moisture content of the biomass are controlled by aeration of the biomass both by a physical moving and mixing process, and by the addition of O.sub.2 into composting trench 1702. Within the biomass, the dissolved ammonia gas NH.sub.3 is in a chemical equilibrium with the NH.sub.4. The ratio of NH.sub.4 to NH.sub.3 in this equilibrium is pH dependent. Preferably, the pH of the biomass is controlled to keep the alkalinity level of the biomass high so that most of the NH.sub.4 in the biomass is converted to NH.sub.3 and released into the air, and not nitrified by the bacteria 16D present in the biomass. Preferably, the pH of the biomass is also controlled so that the aerobic bacteria 16D are not killed by the NH.sub.3 production. In a preferred embodiment, the pH of the biomass is between 8.0 and 10.1.
(108) Each day's biomass may be moved once during the day, several times during the day, and/or continuously throughout the day. As the composting process commences, a rototiller may be used to mix/agitate and aerate the biomass. In other embodiments, other means of moving and/or aerating the biomass may be used in lieu, or in conjunction with, the rototiller. In yet other embodiments, biomass may not be added to the composting trench 1702 daily, but may be added more often than that, or less often than that, i.e., every other day. In this manner, the next load of biomass may be added the same day as the previous load, or every other day. The amount of biomass and time intervals between each addition may vary.
(109) In a preferred embodiment, O.sub.2 is added to the biomass during the aerobic composting process to facilitate the composting reaction. Preferably, the form of O.sub.2 addition is air. Preferably, the rate of O.sub.2 addition is determined by the temperature of the biomass 16A. Preferably, O.sub.2 is added to any one or more of the day 1 to day 15 allotments of biomass. Preferably, the amount of O.sub.2 added over the length of composting trench 1702 decreases. In this manner, preferably, the amount of O.sub.2 added on day 10 is less than the amount of O.sub.2 added on day 1. In other embodiments, other sources of O.sub.2 may be used and/or other means of controlling O.sub.2 addition may be used. Air ducts 1706 may be used to regulate airflow. This may ensure that bacteria 16D in the biomass receive an adequate supply of O.sub.2 to complete the composting process. In other embodiments, other means of regulating airflow, in lieu of, or in conjunction with air ducts 1706, may be used.
(110) Aerobic bacteria 16D are provided to highly selectively convert all or substantially all of the waste amino acids, proteins, uric acid and any other available nitrogen compounds in the biomass into NH.sub.3 and/or NH.sub.4 and CO.sub.2. Preferably, the specific strains of aerobic bacteria 16D used in the present invention include uricolytic bacteria such as Bacillus pasteurii and/or Peptostreptococcus anaerobius, Clostridium sticklandii, Clostridium aminophilum, and Eubacterium pyruvativorans. Thermophilic bacteria are preferred because their presence reduces the population of harmful bacteria such as E. coli, Salmonella and fecal coli-form bacteria. During the aerobic composting process, the biomass should remain at a temperature of 50 C. to 70 C. to promote the growth of thermophilic bacteria. The heat to maintain this temperature is supplied by the aerobic composting process and is distributed by heat conducting water system 1712. Regular aeration of the biomass helps to regulate the temperature as well as supplies the oxygen to the bacteria 16D. It is not necessary to add external heat to the aerobic composting process to manufacture ammonium sulfate according to the present invention.
(111) As the aerobic process progresses, the aerobic bacteria 16D highly selectively convert all or substantially all of the waste amino acids, proteins, uric acid and any other available nitrogen compounds in the biomass into NH.sub.3 and/or NH.sub.4 and CO.sub.2. The resulting NH.sub.3 and CO.sub.2 gasses are collected from the atmosphere of the composting building 1700 by means of hood 1714 and/or air flow ducts 1706, or another suitable air handling system manufactured to withstand the corrosion associated with NH.sub.3 and CO.sub.2 gases. Preferably, the air handling system should be capable of changing the building volume of air in less than one hour.
(112) Referring to
(113) The captured NH.sub.3 and/or NH.sub.4 react with the aqueous solution in collection tank(s) 1901, and are converted to ammonium hydroxide. The ammonium hydroxide reacts with captured CO.sub.2 to form ammonium polycarbonate. Preferably, the process is allowed continued until the pH in the collection tank(s) 1901 reaches 8.5 to 9.35. Preferably, the process is allowed to continue until the concentration of ammonium polycarbonate in the aqueous solution of the collection tank(s) 1901 reaches a concentration of between 1,600 ppm and 4,500 ppm as measured with an electrical conductivity meter.
(114) In the preferred embodiment, after the concentration of ammonium polycarbonate in the aqueous solution of the collection tank(s) 1901 reaches a concentration of between 1,600 ppm and 4,500 ppm, the aqueous solution containing ammonium polycarbonate, ammonium hydroxide and CO.sub.2, is removed from the collection tank(s) 1901 through a first piping system 1903, and is transferred to one or more pre-osmosis holding tank(s) 1904. In order to increase the concentration of the ammonium polycarbonate in the aqueous solution, the aqueous solution containing ammonium polycarbonate, ammonium hydroxide and CO.sub.2 is transferred from pre-osmosis holding tank(s) 1904 to one or more reverse osmosis devices 206 through a second piping system 1905. The reverse osmosis devices may include a DOW FILMTEC XLE-440 reverse osmosis membrane, or a similar reverse osmosis membrane. The reverse osmosis process allows water to be removed from the aqueous solution resulting in a more concentrated ammonium polycarbonate solution. The removed water is transferred from reverse osmosis device(s) 1906 through a third piping system 1907 to a water holding tank 1908, and may be reused in the process or discarded. The reverse osmosis process may be repeated as necessary to increase the concentration of the ammonium polycarbonate in the aqueous solution. In other embodiments, the reverse osmosis process may be replaced by other processes suitable for increasing the concentration of the ammonium polycarbonate solution in the aqueous solution, or it may be omitted.
(115) The aqueous solution containing concentrated ammonium polycarbonate is transferred from reverse osmosis device(s) 1906 through a fourth piping system 1909 to one or more reaction tank(s) 1910. Sulfate 1912 is added to reaction tank(s) 1910 at a ratio of approximately 5 pounds of sulfate for each 1 gallon of ammonia solution. In certain alternate preferred embodiments of the seventh method, the source of sulfate 1912 preferably comprises Organic Materials Review Institute (OMRI) certified organic gypsum. According an embodiment of the present invention, in order to improve the yield of ammonium sulfate, excess sulfate 1912 may be added to reaction tank(s) 1910, at a ratio of approximately 6 pounds of sulfate for each 1 gallon of ammonia solution.
(116) The temperature of the aqueous solution containing concentrated ammonium polycarbonate and sulfate 1912 in reaction tank(s) 1910 is raised to 50.degree. C. or allowed to rise to 50.degree. C. due to the chemical reaction between the ammonium carbonate and sulfate 1912. During the initial reaction period (preferably four hours), the aqueous solution containing concentrated ammonium polycarbonate and sulfate 1912 is mixed and circulated inside reaction tank(s) 1910, resulting in the formation of ammonium sulfate suspension 1915 and calcium carbonate. The pressure may be allowed to increase in the reaction tank(s) 1910 in order to increase the rate and yield of ammonium sulfate. Preferably, the pressure is allowed to increase to two atmospheric pressures or greater. Calcium carbonate is allowed to settle to the bottom of reaction tank(s) 1910 in the form of the calcium carbonate sludge. In a preferred embodiment, the calcium carbonate sludge is removed from reaction tank(s) 1910 through a floor drain and a fifth piping system 1916 to one or more bag filters 1917 which capture the calcium carbonate sludge. The resulting captured calcium carbonate sludge can be recovered and used as a separate product for various agricultural and non-agricultural purposes.
(117) After the initial reaction period (preferably four hours), the aqueous solution containing concentrated ammonium polycarbonate, sulfate 1912 and ammonium sulfate suspension 1915 is moved from reaction tank(s) 1910 through a sixth piping system 1913 to one or more holding area tank(s) 1914, where the presence of unreacted sulfate 1912 in said aqueous solution allows the formation of ammonium sulfate suspension 1915 to proceed for an additional period of time, preferably for more than 5 days. Most preferably, the formation of additional ammonium sulfate suspension 1915 in holding area tank(s) 1914 is allowed to proceed for a period of 10 days.
(118) According to an embodiment of the invention, the resulting ammonium sulfate suspension 1915 may be centrifuged to remove excess water in order to concentrate the ammonium sulfate suspension 1915 to a desired density for use as a liquid fertilizer. In other embodiments, the centrifugation process may be replaced by other processes suitable for increasing the concentration of the ammonium sulfate suspension 1915. According to an embodiment of the invention, the ammonium sulfate suspension 1915 may be dried to form crystals of dry ammonium sulfate. The resulting liquid or dry ammonium sulfate is certifiable as organic. The term organic as used herein, is a labeling certification term that refers to an agriculture product produced in accordance with the Code of Federal Regulations (CFR) Title 7 (Subtitle B, Chapter I, Subchapter M, Part 205).
(119) The foregoing disclosures and statements are illustrative only of the Present Invention, and are not intended to limit or define the scope of the Present Invention. The above description is intended to be illustrative, and not restrictive. Although the examples given include many specificities, they are intended as illustrative of only certain possible configurations or aspects of the Present Invention. The examples given should only be interpreted as illustrations of some of the preferred configurations or aspects of the Present Invention, and the full scope of the Present Invention should be determined by the appended claims and their legal equivalents. Those skilled in the art will appreciate that various adaptations and modifications of the just-described preferred embodiments can be configured without departing from the scope and spirit of the Present Invention. Therefore, it is to be understood that the Present Invention may be practiced other than as specifically described herein. The scope of the present invention as disclosed and claimed should, therefore, be determined with reference to the knowledge of one skilled in the art and in light of the disclosures presented above.