According to various embodiments a system includes a housing. A chamber is disposed within the housing and receives a working fluid. The working fluid includes at least one of one or more sulfide species and one or more phosphorous species. In the system a first anode and a first cathode are each at least partially disposed within the chamber. At least one of the first anode and the first cathode are formed from at least one of: low carbon steel, stainless steel, copper, plain carbon cloth, and one or more mixed metal oxides. At least a first one of the one or more sulfide species and the one or more phosphorous species is electrochemically converted at the first anode or the first cathode to at least one first reaction product. The first reaction product is removable from the working fluid through a separation apparatus.

An apparatus for treating waste sludge includes an outer container casing, internally hollow, an inner body coaxial with the outer casing, a compacting and dehydrating chamber, inside the outer container casing and along which sludge to be treated runs, an inlet zone for supplying sludge to the chamber, an outlet zone for unloading treated sludge, movement elements for the sludge, cooperating with the inner body, which promote compaction and advancement of the sludge from the inlet zone to the outlet zone; a container net connected to a negative pole of a control unit to form a cathode, and the inner body connected to a positive pole to form an anode. A method of treating sludge includes the promoting the continuous advancement and compaction of sludge inside a compression chamber between the anode and cathode, and establishing a difference in potential in order to subject the sludge to an electrical field.

The present invention describes a PEF (pulsed electric field) chamber, said PEF chamber 1 comprising a tube 2 with two open ends 3, 4 having attachment means 5, 6 enabling the PEF chamber 1 to be a plug-in device, wherein the tube 2 has a length L from one open end 3 to the other open end 4 and an inner width IW from one side of the tube to the other side of the tube in a cross section being perpendicular to the length L thereof, wherein the tube 2 has a geometrical narrowing of the inner width IW somewhere along the length L of the tube 2, and wherein the PEF chamber 1 comprises a grid 9 of an insulating material being arranged at the geometrical narrowing or electrode units 7, 8 being arranged opposite each other at the geometrical narrowing of the inner width IW along the length L of the tube 2. The plug-in feature of the present invention renders the PEF chamber to function as an 1 attachable and disposable PEF chamber.

The present invention describes a PEF (pulsed electric field) chamber, said PEF chamber 1 comprising a tube 2 with two open ends 3, 4 having attachment means 5, 6 enabling the PEF chamber 1 to be a plug-in device, wherein the tube 2 has a length L from one open end 3 to the other open end 4 and an inner width IW from one side of the tube to the other side of the tube in a cross section being perpendicular to the length L thereof, wherein the tube 2 has a geometrical narrowing of the inner width IW somewhere along the length L of the tube 2, and wherein the PEF chamber 1 comprises a grid 9 of an insulating material being arranged at the geometrical narrowing or electrode units 7, 8 being arranged opposite each other at the geometrical narrowing of the inner width IW along the length L of the tube 2. The plug-in feature of the present invention renders the PEF chamber to function as an 1 attachable and disposable PEF chamber.

A methane fermentation method having the steps of finely pulverizing an organic substance adjusted such that a moisture content of the organic substance is equal to or less than 10%, in a wet bead mill; supplying the organic substance which is finely pulverized in the pulverization step to a methane fermentation chamber and decomposing the organic substance with an anaerobic microorganism to cause methane fermentation so as to generate methane gas; separating, with a UF membrane, a digestive fluid after the methane fermentation in the methane fermentation step into a concentrated liquid and a permeation liquid; returning the concentrated liquid separated in the separation step to the methane fermentation chamber; and agitating the contents of the methane fermentation chamber with a water flow produced by the return of the concentrated liquid in the return step.

A methane fermentation method having the steps of finely pulverizing an organic substance adjusted such that a moisture content of the organic substance is equal to or less than 10%, in a wet bead mill; supplying the organic substance which is finely pulverized in the pulverization step to a methane fermentation chamber and decomposing the organic substance with an anaerobic microorganism to cause methane fermentation so as to generate methane gas; separating, with a UF membrane, a digestive fluid after the methane fermentation in the methane fermentation step into a concentrated liquid and a permeation liquid; returning the concentrated liquid separated in the separation step to the methane fermentation chamber; and agitating the contents of the methane fermentation chamber with a water flow produced by the return of the concentrated liquid in the return step.

A high-efficiency and multifunctional sludge conditioner and a preparation method thereof is disclosed. The preparation method includes: soaking and adsorbing bacterial cellulose in an alkaline solution, and then taking out the bacterial cellulose to carbonize and activate the same at 380-480 C. and in a nitrogen atmosphere to obtain pretreated bacterial cellulose; and dispersing the pretreated bacterial cellulose in water, adding with an acrylamide monomer and an initiator for in-situ polymerization, and successively subjecting a reaction product to centrifugal separation, drying and crushing to obtain the high-efficiency and multifunctional sludge conditioner. In the present disclosure, the high-efficiency and multifunctional sludge conditioner only has a good flocculation sedimentation effect on the sludge, but also has a good adsorption effect on heavy metals in the water, thereby reducing the moisture content of the sludge and simultaneously reducing the content of the heavy metals and other harmful substances in the water body.

The present disclosure belongs to the technical field of sludge treatment, and discloses a sludge and kitchen waste collaborative digestion process coupled with intermediate thermal hydrolysis. The collaborative digestion process includes: 1) screening and slurrying kitchen waste, and desanding and deslagging primary sludge; 2) mixing the kitchen waste and the primary sludge, and carrying out first-stage collaborative anaerobic digestion on the mixture; 3) mixing the first-stage collaborative anaerobic digestion product with residual activated sludge, and carrying out centrifugal dehydration; 4) carrying out thermal hydrolysis on the dehydrated sludge cake; 5) desanding the thermally-hydrolyzed sludge; 6) diluting the desanded thermally-hydrolyzed sludge followed by heat exchange; 7) carrying out second-stage anaerobic digestion; 8) carrying out plate-frame dehydration; 9) carrying out anaerobic ammonia oxidation on the filtrates; and 10) compounding sludge cake nutrients to produce organic nutrient soil. In the present disclosure, good complementarity of sludge and kitchen waste in terms of material properties is fully utilized, configuration of thermal hydrolysis is optimized, generation of non-degradable substances is reduced, and investment on thermal hydrolysis is reduced. A biogas yield and a biogas output are improved, and energy self-sufficiency of a sewage treatment plant is realized on the basis of a centralized treatment method of regional organic solid waste.

A cement composition based on a sulfoaluminate clinker is described, together with its use for agglomerating and inerting sediment/dredging sludge, and the relative inerting method and apparatus.

A cement solidification device for waste includes a slurrying vessel 14 that dissolves and slurries waste 11 containing harmful substances and deliquescent compounds in solvent water 12 to obtain slurried material 13; an iron-based additive supply unit 16 that adds an iron-based additive 15 to the slurrying vessel 14; a cement kneading vessel 20 that adds a cement solidifying agent 17 from a cement-solidifying agent supply unit 18 to the slurried material 13 in which the iron-based additive 15 is mixed to obtain a cement kneaded product 19; and a cement solidification unit 22 that cures the cement kneaded product 19 to form a cement solidified product 21.