Method for Obtaining Clean Drinking Water from Dewatered Biological Products and a Device for Dewatering Such Products

Abstract

A method for obtaining pure drinking water from dewatered biological products is described. The process is carried out in a hermetic dewatering chamber isolated from the ambient atmosphere and in parallel with a process during which dried products are placed on drying trays. All the process parameters, such as temperature, humidity, and appropriate pressure inside the chamber, are controlled. The vapor generated during the product dewatering process, released from the products, is continuously removed from the dewatering chamber through the upper opening, exits through the outflow channel, and enters through the condenser. The process of obtaining clean drinking water is carried out outside the chamber and is conducted in several stages: vapor passes through disinfectant grids, vapor flows to a condenser cooled with ice water, and the vapor condenses on densely arranged lamellas. The condensate is then pumped to a discharge tub.

Claims

1. A method for obtaining pure drinking water from dewatered biological products that accompanies a dewatering process of said products, carried out in a hermetic dewatering chamber isolated from the ambient atmosphere and in parallel with a process during which dried products placed on drying trays, arranged on at least one rack with shelves having heating surfaces, are tightly closed inside a hermetic dewatering chamber, the products having already undergone an initial phase of being subjected to a gas medium in the form of nitrogen at temperatures from 30° C. to 50° C., at a pressure from 1.1 to 1.4 Pa inside the dewatering chamber. after which the actual dewatering phase begins and is initiated by activating all the components of the device, where all the parameters of the dewatering process such as temperature, humidity and appropriate pressure inside the dewatering chamber are controlled automatically by a setting and control system, after which phase, the raw material is subjected to two simultaneous processes with the use of the blowing and heating systems, i.e., the process of being blown with a gas medium that flows through a batch of biological product at positive pressure and a predetermined temperature of 30° C. to 45° C., and the process of desorption drying induced by shelf heating surfaces, which involves heating the product to a temperature of 40 to 45° C. by the heat released from the heating system and the vapour generated during the product dewatering process, originated/released from the dewatered products, is continuously removed from the dewatering chamber through the upper opening, exits through the outflow channel and enters through the flow channel (air duct) the condenser. located outside the dewatering chamber, and the condensate is directed to a special container, also located outside the dewatering chamber, wherein the process of obtaining clean drinking water is carried out outside the dewatering chamber and is conducted in several stages, in which: a) warm vapour, originating from the dewatered products, escaping continuously through the upper opening of the dewatering chamber into the outflow channel forming part of the flow channel, located outside the dewatering chamber, flows through wire disinfectant grids placed in the channel, b) then the vapour flows towards the condenser made of acid-resistant steel which is cooled down by ice water from a refrigerating unit whereby as a result of the cooling of the condenser, at the point where warm gases leaving the dewatering chamber come into contact with the condenser, the “dew point” occurs, where—at the temperature of cooled condenser ranging from +5° C. to +I 5° C.—the process of gas condensation begins, c) the vapour condenses on the densely arranged lamellas made of acid-resistant steel and located inside the condenser, d) next, fans pump the vapour, and the condensate generated from the condensation of the vapour is directed in sterile conditions from the condenser to a condensate discharge tub, e) the condensate goes into a flow duct (i.e. pipes or a hose) and it flows through it in sterile conditions into a special water storage tank.

2. A device for dewatering products. provided with elements allowing for extracting crystal clear water from the dewatered biological products, comprising a physically and thermally closed unit, with a hermetic dewatering chamber fitted with a door and connected by pipes with a condenser located outside the chamber, with a heat exchanger inside the chamber, with the said heat exchanger having a form of a rack, whose entire supporting structure is filled with heating liquid and the rack has shelves on which drying trays filled with dewatered biological raw material are stacked one over another, additionally the rack is detachably connected to a heater by an inflow and outflow pipeline located outside the dewatering chamber, and having also a system for introducing nitrogen and bacteriostatic agents inside the dewatering chamber, comprising a nitrogen container placed outside the dewatering chamber, which is connected by pipes to injectors located at a floor of the dewatering chamber and is equipped with a system for forcing flow of a gas medium at a predetermined pressure; in a rear wall of the dewatering chamber, at a height of each tray shelf, fans—preferably turbine ones—with individual capacity control are placed that blow a gas medium into the dewatering chamber, into spaces between the drying trays and apart from this, the device has an automated setting and control system, which controls the process parameters and a container, also located outside the dewatering chamber, for collecting the condensate wherein in a flow channel located over the dewatering chamber, in which a gas medium flows in a closed circuit, there are at least two replaceable, disinfectant wire grids, of which at least one grid is located in the outflow channel, forming part of the flow channel, in the space between an upper opening of the dewatering chamber and the condenser, forming a vessel located in middle of the flow channel, made of acid-resistant steel, and furthermore at least one disinfectant wire grid is located in the inflow channel, also forming part of the now channel, in the space between the condenser, and the upper inflow opening of the dewatering chamber (through which dehydrated vapor ape re-enters the dewatering chamber), and independently, outside the dewatering chamber at a side adjacent to the upper opening constituting the inflow channel, there is a refrigerating unit which cools the condenser with ice water and causes the “dew point”, where the process of condensation of the gas begins, and inside the condenser there are densely mounted lamellas, made of acid-resistant steel, connected to each other by a tubular spiral, under the condenser there is a condensate discharge tub, also made of acid-resistant steel, connected to a sterile flow duct, connected to a special sterile water storage tank.

3. The device according to claim 2, wherein replaceable wire disinfectant grids are made from copper.

4. The device according to claim 2 or 3 wherein replaceable wire disinfectant grids are made from silver (i.e. silver-coated) wire.

5. The device according to claim 2 wherein the sterile flow pipe is a hose line.

6. The device according to claim 2 or 5 wherein the sterile flow duct is a system of pipes.

Description

[0056] The subject matter of the invention is explained and exemplified by a drawing, where

[0057] FIG. 1 presents a device for dewatering, provided with elements allowing for extracting crystal clear water from the dewatered biological products according to the invention in side view;

[0058] FIG. 2—The same dewatering device in a rear perspective view;

[0059] FIG. 3—shows a cross-section of the device longitudinally;

[0060] FIG. 4—the device in partial view and partial cross-section;

[0061] FIG. 5—cross-section of the dewatering chamber in top view;

[0062] FIG. 6—view of the flow channel FC with visible disinfection wire grids (with one grid located at the dewatering chamber outflow channel and the second grid located at the dewatering chamber inflow channel);

[0063] FIG. 7—container in perspective view with five identical but independent stations (sections) visible.

[0064] The device for dewatering biological products consisting of three systems: blowing system, heating system and setting-control system has been retrofitted with elements allowing for obtaining clean drinking water from the dewatered biological products.

[0065] The device has a dewatering chamber 1 made of acid-resistant steel, with thermal insulation in the form of a layer of polystyrene foam, not shown on the drawing. Additionally, the dewatering chamber 1 is insulated with an anti-moisture layer not shown in the figure and lined on the inside with waterproof elements also not shown in the figure. The dewatering chamber 1 is opened and closed hermetically by means of the door 2. In the rear wall 3 of the dewatering chamber 1, there are turbine fans 4, with individual capacity control, directing the movement of the gases in the blowing system.

[0066] When the device is in operation, inside the dewatering chamber 1 a rack 5 with a tubular structure is placed, having several shelves 6 with heating elements 7 consisting of parallel pipes through which water flows. On each of the shelves 6 perforated drying trays are placed, not shown in the figure, on which the moist raw material to be subjected to the drying process is laid. The drying trays are made of copper, covered with a shielding layer and framed with an insulating element. The rack 5 together with the heating elements 7 of the shelves 6 is detachably connected (by means of self-closing couplings not shown in the figure) by pipes 8 to the heater 9, located outside the system. The rack 5 plays a double role in the device—of a drying cart and at the same time of a heat exchanger in the heating system. Inside the dewatering chamber 1 there are also components supplying nitrogen into the chamber, namely injectors 10, connected by a pipe 11 to a nitrogen container 12 located outside the system, i.e. outside the dewatering chamber 1.

[0067] Above the dewatering chamber 1 there is a flow channel FC, constituting a closed circuit, connected to the chamber 1 by two openings—an inflow and outflow opening, and which flow channel FC comprises two parts—i.e. an outflow channel 13 (through which humid gas medium escapes during the dewatering process) and an inflow channel 15 (through which the dehydrated gas medium is forced back into the interior of the dewatering chamber 1 by means of fans 4). Between the outflow channel 13 and the inflow channel pipe 15, there is a condenser 14.

[0068] Apart from the system, the device has a special water storage tank 16 and a setting and control system 17, located on one of the outer side walls of the dewatering chamber 1, allowing to control the humidity and pressure inside the dewatering chamber 1.

[0069] In addition, the device is equipped with components for extracting clean drinking water from the dewatered biological products, all of which are located outside the hermetic dewatering chamber 1.

[0070] Thus—in the FC flow channel, in two places there are two replaceable disinfectant wire grids 20, made of silver (i.e. silver-coated) wire, designed to have a bactericidal, disinfecting (antiseptic) effect on the vapour escaping from the dewatering chamber 1. One of them, i.e. the wire grid 20a-constitutes a first barrier through which the humid vapour escapes from the dewatering chamber 1, the wire grid 20a is installed in the outflow channel 13, in the space between the upper outflow opening of the dewatering chamber 1 and the condenser 14, made of acid-resistant steel.

[0071] A second wire grid 20b—constitutes a further barrier through which the already dehydrated vapour enters, the said wire grid 20b being installed in the inflow channel 15, in the space between the condenser 14 and the upper inflow opening of the dewatering chamber 1, i.e. in the space in which the dry vapour is re-injected by means of the fans 4 inside the dewatering chamber 1.

[0072] On the outer side wall of the dewatering chamber 1, at the side adjacent to the upper inflow opening of the dewatering chamber 1, them is a cooling unit in the form of a refrigerating unit 18, cooling the condenser 14 with ice water, in order to cause the “dew point” at the point where warm gases coining out of the dewatering chamber 1 come into contact with the condenser 14 in which—at the temperature of the cooled condenser 14 within the range of +5° C. to +15° C.—the process of condensation of water vapour begins.

[0073] Inside the condenser 14 there are densely mounted lamellas 19, made of acid-resistant steel, connected to each other—similarly to the heater—by a tubular spiral, on which lamellas 19 the water vapour that penetrates from the flow channel to the condenser 14 condenses and turns into water.

[0074] Under the condenser 14 there is a condensate discharge tub 21, made of acid-resistant steel, connected to a sterile flow duct, which is a system of pipe connections 22, and which is connected to a special tank used for storing water 16, also made of acid-resistant steel.

[0075] The presented device for dewatering biological products was used to dry a batch of 500 kg of sauerkraut and 500 kg of pickled onion and simultaneously recover water from both products undergoing the drying process.

[0076] For this purpose, 5 independent drying stations were set up in a single container, five-station unit, i.e., five hermetic dewatering chambers 1.sub.1, 1.sub.2, 1.sub.3, 1.sub.4, and 1.sub.5, each of which contained its own external installation for recovering water from the products undergoing the drying process inside the dewatering chamber (drying chamber).

[0077] For this purpose, after the initial preparation, the machine operator sorted the products. He then brought the segregated products on unloading carts to the container assembly of the dewatering chamber 1 and placed the pickled cabbage in single layers on the appropriate drying trays in the drying stations 1.sub.1, 1.sub.2, 1.sub.3, after which the trays were placed on the heating elements 7 of the mobile rack 5 shelves 6 having wheels attached, which stood in a room outside the device. He did the same with the pickled onion, placing it on appropriate drying trays constituting the drying stations 1.sub.4 and 1.sub.5, after which he placed the individual drying trays loaded with pickled onions on the heating elements 7 of the mobile rack 5 shelves 6.

[0078] After that he tightly closed the door 2 of this chamber. Then, the operator activated the injectors 10 in each of the chambers (i.e., chambers 1.sub.1, 1.sub.2, 1.sub.3, 1.sub.4, and is), which began to supply nitrogen into each chamber, stored in a cylinder 12 provided with each device. The nitrogen temperature was plus 40° C. After waiting for 10 minutes, during which time the atmosphere in each dewatering chamber (i.e., chambers 1.sub.1, 1.sub.2, 1.sub.3, 1.sub.4, and 1.sub.5) changed, causing the aerobic bacteria to disappear, the operator activated all the components of the device 1.sub.1, 1.sub.2, 1.sub.3, 1.sub.4, and 1.sub.5, and the setting and control system 17 of each device automatically adjusted all parameters of the dewatering process, including temperature, humidity, and pressure inside each of the dewatering chambers (i.e., chambers 1.sub.1, 1.sub.2, 1.sub.3, 1.sub.4, and 1.sub.5), which reached 1.2 Pa as intended.

[0079] The process of dewatering both biological products, i.e. sauerkraut in chambers 1.sub.1, 1.sub.2, 1.sub.3 and pickled onion in chambers 1.sub.4, and 1.sub.5. was started. The products were simultaneously subjected to two processes via two systems (blowing and heating system)—the blowing process first utilising nitrogen, then air, with simultaneous desorption drying, which involved raising the temperature of the product to plus 45° C. by the thermal energy released from the heating system by the heating elements 7 of the shelves 6 in contact with the drying trays. As a result of the two processes, dehydration of the produce proceeded until the moisture content of the dried vegetables was reduced to the desired level of less than 2%.

[0080] During the entire dewatering cycle, water from the sauerkraut and from the pickled onion was evaporating and the vapour that came from the dewatered products was removed from all five chambers, i.e., chamber 1.sub.1, 1.sub.2, 1.sub.3, 1.sub.4 and 1.sub.5 continuously through a water condensation system.

[0081] During the process the humid vapour was escaping through an outflow opening of each dewatering chamber (1.sub.1, 1.sub.2, 1.sub.3, 1.sub.4 and 1.sub.5), into the flow channel FC located above each of the chambers and, entering through the part of the channel which constitutes the outflow channel 13, flowed through one of the disinfectant wire grids 20 made of silver (i.e., silver-coated) wire. Then, after reaching the condenser 14, cooled by ice water coming from the refrigerating unit 18, located in the middle of the flow channel FC (i.e. between the outflow channel 13 and the inflow channel 15)—at a temperature ranging from +5° C.—to +15° C.—the moist and, at the same time, warm water vapour, as a result of rapid cooling, reached the state of saturation, the “dew point” occurred, in which the water vapour became supersaturated and the process of its condensation began.

[0082] The vapour condensed on the densely arranged lamellas 19 made of acid-resistant steel and located inside the condenser 14. The water formed in the condenser 14 flowed into the condensate discharge tub 21, made of acid-resistant steel, located under the condenser 14, and from there through a sterile flow duct, which is a system of pipe connections 22, flowed into a special water storage tank 16, also made of acid-resistant steel, with the water recovered in the process of dewatering the sauerkraut, carried out in dewatering chambers 1.sub.1, 1.sub.2 and 1.sub.3 went to tanks 16.sub.1, 16.sub.2 and 16.sub.3, while water recovered from the dewatering of pickled onions went to tanks 16.sub.4 and 16.sub.5 connected to dewatering chambers 1.sub.4 and 1.sub.5.

[0083] At the same time—dry, i.e., dehydrated vapour, flew from the condenser 14 into the second part of the flow channel FC and, passing through the inflow channel 15, was injected again by means of the fans 4 into the dehydration chamber, i.e., into chamber 1 and chamber 1.sub.1, respectively, on the way encountering another barrier in the form of a second disinfectant wire grid 20b.

[0084] By means of the setting and control system 17 located on one of the outer side walls of chamber 1, the person operating both devices was able to systematically control the humidity and pressure inside each section of the dewatering chambers (i.e. 1.sub.1, 1.sub.2, 1.sub.3, 1.sub.4 and 1.sub.5).

[0085] When the dewatering process was completed, the operator of the device, using the setting and control system 17, stabilized all parameters, including the temperature and pressure inside each section of the dewatering chambers (i.e. 1.sub.1, 1.sub.2, 1.sub.3, 1.sub.4 and 1.sub.5), then turned off each piece of equipment, after which opened the door 2 of each chamber, took the racks 5 out of the chambers, and removed the drying trays one by one with the finished dried product, namely dried sauerkraut and dried pickled onion. At the same time, independent water storage tanks—i.e. tank 16.sub.1, 16.sub.2, 16.sub.3, 16.sub.4 and 16.sub.9 were filled with clean drinking water obtained from the dried products—i.e. sauerkraut water and pickled onion water, respectively.

[0086] The obtained products in two different forms, i.e., in dried form and as water, were subjected to thorough laboratory tests conducted at the Faculty of Food Sciences and Nutrition, Department of Plant-Based Food Technology, Poznań University of Life Sciences, which established the following very favorable parameters:

TABLE-US-00001 TESTED PRODUCT - SAUERKRAUT Sauerkraut Tested product dried product water Basic composition (g/100 g) dry substance 82.38 ± 0.2  0.02 total protein 12.37 ± 0.88 nd total fat  0.71 ± 0.06 nd fibre  8.47 ± 0.46 not determined total reducing sugar (mg/l) not determined nd Bx not determined 0.3  Vitamins (mg/100 g) C 74.2 1.1  B1 0.2 0.01 B2 1.1 0.01 B3 0.24 0.03 B6 1.2 0.04 B9 0.9 0.01 B12 5.1 0.02 A 0.9 nd E 3.7 nd K 2.1 nd FC 1.1 nd Phenolic acids (mg/100 g or 100 ml) total mg (GAE/100 g or 100 ml) 128.52 nd Gallic 65.26 nd Chlorogenic 4.26 nd ferulic 1.02 nd Caffeic 1.15 nd 2,4-dihydroxybenzoic 0.21 nd Protocatechuic nd nd 4-hydroxybenzoic 1.49 nd t-cinnamic nd nd Flavonoids (mg/100 g or 100 ml) total mg (RE/100 g or 100 ml) 4.56 nd Luteolina 0.35 nd Kaempferol 0.72 nd Quercitin 0.56 nd Naringenin 2.34 nd Apigenin 1.93 nd Carotenoids (mg/g) Lutein 12.4 nd Zeaxanthin 20.4 nd Anthocyanins (mg/100 g) Betanin nd nd Betaine nd nd Phytosterols (mg/g) beta-sitosterol 45.2 nd stigmasterol 2.3 nd campesterol 1.8 nd avenasterol 0.9 nd Fatty acids (%) total: 100 nd C10:0 (Capric) 0 nd C12:0 (Lauric) 0 nd C14:0 0 nd C15:0 (pentadecanoic acid) 0.09 nd C15:1 (pentadecenoic acid) 0 nd C16:0 (palmitic acid) 23.6 nd C16:1 (palmitoleic acid) 0 nd C17:0 (heptadecanoic acid) 0 nd C17:1 (heptadecenoic acid) 0 nd C18:0 (stearic acid) 29.3 nd C18:1 (oleic acid) 10.3 nd C18:2n6 (linoleic acid) 1.3 nd C18:3n6 (y-linolenic acid) 0.3 nd C18:3n3 (linolenic acid) 9.8 nd C20:0 (arachidic acid) 1.3 nd C20:1 (c-11-eicosenoic acid) 17.6 nd C20:2 (eicosadienoic acid) 1.8 nd C21:0 (heneicosanoic acid) 0.1 nd C22:1 (erucic) 0.31 nd C22:6 n-3 3.2 nd C24:0 (tetracosanoic) 0 nd C24:1 (nervonic) 1 nd Mineral components Calcium (mg/100 g) or mg/100 ml) 692.43 0.11 Iron (mg/100 g) or mg/100 ml) 4.17 0.02 Magnesium (mg/100 g) or mg/100 ml) 111.81 0.01 Phosphorus (mg/100 g) or mg/100 ml) 34 nd Potassium (mg/100 g) or mg/100 ml) 282 nd Sodium (mg/100 g) or mg/100 ml) 352 6   Zinc (mg/100 g) or mg/100 ml) 13.81 0.02 Copper (mg/100 g) or mg/100 ml) 0.29 0.04 Manganese (mg/100 g) or mg/100 ml) 1.55 nd LEGEND: nd—not detected GAE—gallic acid RE—rutin equivalents

TABLE-US-00002 TESTED PRODUCT - PICKLED ONION Pickled onion Tested product dried product water Basic composition (g/100 g) dry substance 82.25 ± 0.12  0.01 total protein 8.60 ± 0.94 0.05 ± 0.03  total fat 0.58 ± 0.03 not determined fibre 2.85 ± 0.28 not determined total reducing sugar (mg/l) not determined 0.33 ± 0.004 Bx not determined 0.3  Vitamins (mg/100 g) C 3.6 0.4  B1 4.8 0.05 B2 0.9 0.01 B3 nd nd B6 nd nd B9 47.3 0.2  B12 nd nd A nd nd E nd nd K nd nd PP nd nd Phenolic acids (mg/100 g or 100 ml) total mg (GAE/100 g or 100 ml) 131.56 2.1  gallic 33.23 1.26 chlorogenic 1.11 nd ferulic 2.34 nd caffeic 3.01 nd 2,4-dihydroxybenzoic 1.53 nd protocatechuic 4.85 nd 4-hydroxybenzoic nd nd t-cinnamic nd nd Flavonoids (mg/100 g) total mg (RE/100 g) 22.95 nd luteolin 0.63 nd kaempferol 2.42 nd quercitin 21.35 nd naringenin 1.21 nd apigenin nd nd Carotenoids (mg/g) lutein 12.4 nd zeaxanthin 20.4 nd Anthocyanins (mg/100 g) betanin nd nd betaine nd nd Phytosterols (mg/g) beta-sitosterol nd nd stigmasterol nd nd campesterol nd nd avenasterol nd nd Fatty acids (%) total: 100 nd C10:0 (Capric) nd nd C12:0 (Lauric) nd nd C14:0 nd nd C15:0 (pentadecanoic acid) nd nd C15:1 (pentadecenoic acid) nd nd C16:0 (palmitic acid) 10.4 nd C16:1 (palmitoleic acid) 0.36 nd C17:0 (heptadecanoic acid) nd nd C17:1 (heptadecenoic acid) nd nd C18:0 (stearic acid) 2.56 nd C18:1 (oleic acid) 17.2 nd C18:2n6 (linoleic acid) 13.4 nd C18:3n6 (y-linolenic acid) nd nd C18:3n3 (linolenic acid) 34.88 nd C20:0 (arachidic acid) 0.1 nd C20:1 (c-11-eicosenoic acid) 19.6 nd C20:2 (eicosadienoic acid) 1.1 nd C21:0 (heneicosanoic acid) nd nd C22:1 (erucic) nd nd C22:6 n-3 nd nd C24:0 (tetracosanoic) 0.2 nd C24:1 (nervonic) 0.2 nd Mineral components Calcium (mg/100 g) or mg/100 ml) 437.05 0.25 Iron (mg/100 g) or mg/100 ml) 5.41 nd Magnesium (mg/100 g) or mg/100 ml) 57.09 0.01 Phosphorus (mg/100 g) or mg/100 ml) 29 nd Potassium (mg/100 g) or mg/100 ml) 211 nd Sodium (mg/100 g) or mg/100 ml) 426 nd Zinc (mg/100 g) or mg/100 ml) 9.39 0.02 Copper (mg/100 g) or mg/100 ml) 0.52 0.01 Manganese (mg/100 g) or mg/100 ml) 0.88 nd LEGEND: nd—not detected GAE—gallic acid RE—rutin equivalents

SUMMARY DESCRIPTION

[0087] The subject matter of the invention is a method for obtaining pure drinking water from dewatered biological products, which accompanies the dewatering process of these products, carried out in a hermetic dewatering chamber, isolated from the ambient atmosphere, and which runs in parallel with the process during which the dried products placed on drying trays, arranged on at least one rack with shelves having heating surfaces, are tightly closed inside a hermetic dewatering chamber, the products having already undergone an initial phase of being subjected to a gas medium in the form of nitrogen at temperatures from 30° C. to 50° C. and the pressure from 1.1 do 1.4 Pa inside the dewatering chamber, after which the actual dewatering phase begins, initiated by activating all the components of the device, where all the parameters of the dewatering process such as temperature, humidity and appropriate pressure inside the dewatering chamber are controlled automatically by a setting and control system, after which phase the raw material is subjected to two simultaneous processes with the use of the blowing and heating systems, i.e., the process of being blown with a gas medium that flows through a batch of biological product at positive pressure and a predetermined temperature of 30° to 45°, and the process of desorption drying induced by shelf heating surfaces, which involves heating the product to a temperature of 40-45° C. by the heat released from the heating system and the vapour originated/released from the dewatered products is continuously removed from the dewatering chamber through the upper opening, exits through the outflow channel and enters through the flow channel (air duct) the condenser, located outside the dewatering chamber, and the condensate is directed to a special container, also located outside the dewatering chamber. According to the essence of the invention, the process of obtaining pure drinking water is carried out outside the dewatering chamber (1), the process being carried out in several stages, in which: [0088] a) warm vapour, originating from the dewatered products, escaping continuously through the upper opening of the dewatering chamber (1) into the outflow channel (13) forming part of the flow channel (FC), located outside the dewatering chamber (1), flows through wire disinfectant grids (20) placed in the channel (FC), [0089] b) then the vapour flows towards the condenser (14) made of acid-resistant steel which is cooled down by a refrigerating unit (18) whereby as a result of the cooling of the condenser (14), at the point where warm gases leaving the dewatering chamber (1) come into contact with the condenser (14), the “dew point” occurs, where—at the temperature of cooled condenser (14) ranging from +5° C. to +15° C., the process of gas condensation begins, [0090] c) the vapour condenses on the densely arranged lamellas (19) made of acid-resistant steel and located inside the condenser (14), [0091] d) next, fans (4) pump the vapour, and the condensate generated from the condensation of the vapour is directed in sterile conditions from the condenser (14) to a condensate discharge tub (21), [0092] e) the condensate goes into a flow duct (i.e. pipes or a hose) (22) and it flows through it in sterile conditions into a special water storage tank (16).

[0093] The subject matter of the invention is also a device for dewatering such products, provided with elements allowing for extracting crystal clear water from the dewatered biological products, being an improvement of the design of the device constituting a physically and thermally closed unit, with a hermetic dewatering chamber (1) fitted with a door (2) and connected by pipes with a condenser (14) located outside, inside which chamber a heat exchanger is located, with the said heat exchanger having the form of a rack (5), whose entire supporting structure is filled with heating liquid and the rack (5) has shelves (6) on which drying trays filled with dewatered biological raw material are stacked one over another, additionally the rack (5) is detachably connected to the heater (9) by a supply and outflow pipeline located outside the dewatering chamber (1), and has a system for introducing nitrogen and bacteriostatic agents inside the dewatering chamber (1), comprising a nitrogen container (12) placed outside the dewatering chamber (1), which is connected by pipes (11) to injectors (10) located at the floor of the dewatering chamber (1) and equipped with a system for forcing the flow of a gas medium at a predetermined pressure and in the rear wall of the dewatering chamber (4) at the height of each tray shelf (6), fans (4)—preferably turbine once—with individual capacity control are placed that blow a gas medium into the dewatering chamber (1), into the spaces between the drying trays and apart from that, the device has an automated setting and control system (17), which controls the process parameters as well as a container (16), also located outside the dewatering chamber (1), for collecting the condensate. According to the invention in the flow channel (FC) located above the dewatering chamber (1), in which the gas medium flows in a closed circuit, there are at least two replaceable disinfection wire grids (20), of which at least one grid (20) is located in the outflow channel (13), being part of the flow channel (FC), in the space between the upper opening of the dewatering chamber (1) and the condenser (14), forming a vessel located in the middle of the flow channel (FC), made of acid-resistant steel, and at least one disinfectant wire grid (20) is located in the inflow channel (15) which is also a part of the flow channel (FC), in the space between the condenser (14) and the upper inflow opening of the dewatering chamber (1) (through which dehydrated vapour returns to the dewatering chamber (1)), and apart from that, outside the dewatering chamber (1), at a side adjacent to the upper opening constituting the inflow channel (15), there is a refrigeration unit (18) which cools the condenser (14) by ice water and causes the “dew point”, at which the gas condensation process begins, and inside the condenser (14) them are densely mounted lamellas (19), made of acid-resistant steel, connected to each other by a tubular spiral, under the condenser (14) there is a condensate discharge tub (21), also made of acid-resistant steel, connected to the sterile flow duct (22), connected to a special sterile water storage tank (16).

LIST OF MARKINGS

[0094] 1—dewatering chamber [0095] 2—dewatering chamber door [0096] 3—rear side of the dewatering chamber [0097] 4—fan [0098] 5—rack [0099] 6—shelf [0100] 7—heating element [0101] 8—heating system pipe [0102] 9—heater [0103] 10—injector [0104] 11—nitrogen system line [0105] 12—nitrogen container [0106] FC—flow channel [0107] 13—humid gas medium outflow channel [0108] 14—condenser [0109] 15—dewatered gas medium inflow channel [0110] 16—water reservoir [0111] 17—setting and control system [0112] 18—refrigerating unit [0113] 19—lamellas inside the condenser 14 [0114] 20—disinfectant wire grids [0115] 21—condensate discharge tub [0116] 22—pipe connections, connecting the condenser 14 with water reservoir 16.