CN111689794A - Pig manure liquid fertilizing treatment method and system - Google Patents
Pig manure liquid fertilizing treatment method and system Download PDFInfo
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- CN111689794A CN111689794A CN202010504127.2A CN202010504127A CN111689794A CN 111689794 A CN111689794 A CN 111689794A CN 202010504127 A CN202010504127 A CN 202010504127A CN 111689794 A CN111689794 A CN 111689794A
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- 239000007788 liquid Substances 0.000 title claims abstract description 245
- 210000003608 fece Anatomy 0.000 title claims abstract description 83
- 239000010871 livestock manure Substances 0.000 title claims abstract description 83
- 238000000034 method Methods 0.000 title claims abstract description 24
- 239000003337 fertilizer Substances 0.000 claims abstract description 66
- 239000012528 membrane Substances 0.000 claims abstract description 54
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 53
- 238000001223 reverse osmosis Methods 0.000 claims abstract description 52
- 238000000926 separation method Methods 0.000 claims abstract description 27
- 239000011159 matrix material Substances 0.000 claims abstract description 22
- 235000015097 nutrients Nutrition 0.000 claims abstract description 22
- 238000002156 mixing Methods 0.000 claims abstract description 21
- 238000012216 screening Methods 0.000 claims abstract description 13
- 238000000227 grinding Methods 0.000 claims abstract description 7
- 239000002245 particle Substances 0.000 claims abstract description 7
- 238000004519 manufacturing process Methods 0.000 claims abstract description 6
- 241000282898 Sus scrofa Species 0.000 claims description 73
- 239000002893 slag Substances 0.000 claims description 15
- 239000002699 waste material Substances 0.000 claims description 9
- 238000007599 discharging Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 239000004615 ingredient Substances 0.000 claims description 3
- 239000000758 substrate Substances 0.000 claims description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 239000010865 sewage Substances 0.000 description 4
- 238000009264 composting Methods 0.000 description 3
- 238000000855 fermentation Methods 0.000 description 3
- 239000003895 organic fertilizer Substances 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 239000000725 suspension Substances 0.000 description 3
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000002550 fecal effect Effects 0.000 description 2
- 230000004151 fermentation Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 239000011574 phosphorus Substances 0.000 description 2
- 239000011591 potassium Substances 0.000 description 2
- 229910052700 potassium Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009395 breeding Methods 0.000 description 1
- 230000001488 breeding effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000003973 irrigation Methods 0.000 description 1
- 230000002262 irrigation Effects 0.000 description 1
- 238000005374 membrane filtration Methods 0.000 description 1
- 238000000053 physical method Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
- C05F3/00—Fertilisers from human or animal excrements, e.g. manure
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
- C05F3/00—Fertilisers from human or animal excrements, e.g. manure
- C05F3/06—Apparatus for the manufacture
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G5/00—Fertilisers characterised by their form
- C05G5/20—Liquid fertilisers
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/20—Fertilizers of biological origin, e.g. guano or fertilizers made from animal corpses
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Pest Control & Pesticides (AREA)
- Fertilizers (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention provides a method and a system for treating pig manure liquid manure. The method comprises the steps of carrying out solid-liquid separation on pig manure to obtain pig manure water and pig manure residues; screening out particles which are harmful to a reverse osmosis membrane greatly from pig manure water through a screen 1, carrying out VSEP treatment on the screened liquid, carrying out VSEP treatment on a clear liquid after the VSEP treatment through a reverse osmosis membrane 1, carrying out reverse osmosis membrane 2 treatment on the clear liquid after the reverse osmosis membrane 1 to obtain clear water, returning VSEP treatment to concentrated water after the reverse osmosis membrane 1 treatment, and returning the concentrated water after the reverse osmosis membrane 2 treatment to the reverse osmosis membrane 1 treatment; ultrafine grinding pig manure residues obtained after solid-liquid separation, uniformly mixing the ground pig manure residues with concentrated water treated by VSEP according to a predetermined ratio, and fermenting to obtain a liquid fertilizer matrix; and screening the liquid fertilizer matrix through a corresponding aperture screen 2 according to the liquid fertilizer manufacturing standard, and mixing the screened liquid and the added corresponding nutrient solution according to the requirement for producing the corresponding liquid fertilizer to prepare the corresponding specific liquid fertilizer. The method is simple, efficient, pollution-free, low in cost and high in added value.
Description
Technical Field
The invention relates to a method and a system for treating liquid manure of pig manure, in particular to an integrated method and an integrated system for treating liquid manure of pig manure.
Background
The large-scale and intensive development of the pig breeding industry enables a large amount of pig manure to be generated, the untreated pig manure can cause huge pollution to the environment, and the resource treatment of the pig manure is realized by firstly producing methane through anaerobic fermentation, then carrying out aerobic composting on biogas residues, or carrying out solid-liquid separation on the pig manure, then carrying out aerobic composting on solid manure residues, wherein the final products of the two treatment modes are solid organic fertilizers. At present, the demand of the waste market for liquid organic fertilizer used by spraying or drip irrigation is increasing day by day, and the technology for directly producing the liquid organic fertilizer by utilizing pig manure is not discussed. Meanwhile, a large amount of biogas slurry in an anaerobic treatment mode cannot meet the national standard of commercial liquid organic fertilizer, is not easy to sell in the market, can be consumed on the spot, and needs to be prepared with enough field scale, which is often limited to pig farm site selection. The aerobic composting of the pig manure residues also has the problems of long fermentation time and large occupied area.
Disclosure of Invention
The invention aims to provide a simple and efficient pig manure liquid fertilizing treatment method and system with no pollution, low cost and high added value.
In order to achieve the purpose, the invention provides the following technical scheme:
a method for treating pig manure liquid manure in a fertilizing way comprises the following steps:
carrying out solid-liquid separation on the pig manure through a solid-liquid separator to obtain pig manure water and pig manure residues;
screening pig manure water by using a screen 1 to remove particles which are harmful to a reverse osmosis membrane greatly, subjecting the screened liquid to VSEP treatment, subjecting the clear liquid after the VSEP treatment to reverse osmosis membrane 1 treatment, subjecting the clear liquid after the reverse osmosis membrane 1 treatment to reverse osmosis membrane 2 treatment to obtain clear water, returning the concentrated water after the reverse osmosis membrane 1 treatment to VSEP treatment, and returning the concentrated water after the reverse osmosis membrane 2 treatment to reverse osmosis membrane 1 treatment;
ultrafine grinding pig manure residues obtained after solid-liquid separation, uniformly mixing the ground pig manure residues with concentrated water treated by VSEP according to a predetermined ratio, and fermenting to obtain a liquid fertilizer matrix;
and screening the liquid fertilizer matrix through a corresponding aperture screen 2 according to the liquid fertilizer manufacturing standard, and mixing the screened liquid and the added corresponding nutrient solution according to the requirement for producing the corresponding liquid fertilizer to prepare the corresponding specific liquid fertilizer.
Preferably, the filter residue after being screened by the screen 1 is added with the pig manure again for solid-liquid separation.
Preferably, if the filter residue which is not fully degraded exists in the screen 2, the filter residue which is not fully degraded in the screen 2, the pig manure residue obtained after solid-liquid separation and the concentrated water after VSEP treatment are uniformly mixed according to a preset proportion and then fermented to obtain the liquid fertilizer matrix.
Preferably, the pig manure water after solid-liquid separation enters a collecting tank (tank), and the pig manure residues are used for later use;
liquid of pig manure water in the collecting tank enters a liquid inlet tank after being screened by a screen mesh 1, and filter residue after screening enters a concentrated liquid tank;
clear liquid obtained after the liquid in the liquid inlet pool (tank) is processed by VSEP enters a clear liquid pool (tank) 1, and concentrated liquid enters a concentrated liquid pool (tank);
clear liquid obtained after the liquid in the clear liquid pool (tank) 1 is treated by the reverse osmosis membrane 1 enters the clear liquid pool (tank) 2, and concentrated liquid is returned into the clear liquid pool (tank);
clear liquid in the clear liquid pool (tank) 2 after being treated by the reverse osmosis membrane 2 enters the clear water pool (tank), and concentrated liquid is returned to the clear liquid pool (tank) 1;
the liquid screened by the screen 2 enters a liquid fertilizer matrix pool (tank), and is mixed into a corresponding specific liquid fertilizer in a mixing pool (tank) according to the proportion of the corresponding liquid fertilizer production requirement and the corresponding added nutrient solution.
Preferably, the manure residue generated in the concentrated solution tank is subjected to solid-liquid separation by another solid-liquid separator, and the separated liquid enters the liquid manure substrate tank through the screen 2.
Preferably, the predetermined ratio is determined according to the requirements for making liquid manure, and the ratio of the ingredients is adjusted by adjusting the conveying speed of each material.
The invention also provides a system used in the method for treating the pig manure liquid manure, and the system comprises the following components: the solid-liquid separator is used for carrying out solid-liquid separation on the pig manure; the collecting tank (tank) is used for collecting the pig manure water separated by the solid-liquid separator; the screen 1 is used for removing particles which are harmful to the reverse osmosis membrane in the liquid in the collecting tank (tank); the liquid inlet pool (tank) is used for collecting pig manure water screened by the screen mesh 1 and concentrated water treated by the reverse osmosis membrane 1; VSEP for treating a liquid in a liquid intake sump (tank); a clear liquid pool (tank) 1 for collecting clear liquid after VSEP treatment and concentrated water after reverse osmosis membrane 2 treatment; a reverse osmosis membrane 1 for treating the liquid in the clear liquid tank (tank) 1; a clear liquid pool (tank) 2 for collecting clear liquid treated by the reverse osmosis membrane 1; a reverse osmosis membrane 2 for treating the liquid in the clear liquid tank (tank); the clean water tank is used for collecting the clean liquid treated by the reverse osmosis membrane 2; a concentrated solution tank (tank) having a stirrer for mixing swine waste residue produced by the solid-liquid separator for ultrafine grinding, filter residue sieved by a screen 2, and concentrated water separated by VSEP; the screen 2 is used for screening the mixture fermented in the concentrated solution tank according to the standard for preparing the liquid fertilizer; the liquid fertilizer matrix pool (tank) is used for collecting liquid screened by the screen 2; a mixing tank (tank) having a stirrer for mixing the liquid in the liquid fertilizer matrix tank (tank) and the nutrient solution in the nutrient solution tank (tank) to make a specific liquid fertilizer; and the nutrient solution pool (tank) is used for providing nutrient solution required for preparing the specific liquid fertilizer.
Preferably, the bottom of the concentrated solution pool (tank) is provided with a slag discharge hole for periodically discharging the difficult-to-degrade fecal slag.
Preferably, the system also comprises another solid-liquid separator, which is used for carrying out solid-liquid separation on the excrement slag which is discharged from the concentrated solution pool (tank) and is difficult to degrade, and the separated liquid enters the liquid fertilizer matrix pool (tank) through the screen 2.
Compared with the prior art, the invention has the beneficial effects that:
(1) the pig manure sewage and the pig manure slag do not fall to the ground.
(2) The pig manure sewage is treated by a full physical method (membrane separation), no chemicals are added, and no secondary pollution is caused.
(3) Nearly more than 90 percent of the plant nutrient elements of nitrogen, phosphorus and potassium in the pig manure wastewater are returned to the liquid fertilizer (water soluble fertilizer, leaf fertilizer or suspension fertilizer).
(4) A large amount of water contained in the pig manure sewage is directly separated into clear water which can be directly discharged, recycled and even drunk through membrane separation; meanwhile, organic matters, nitrogen, phosphorus and potassium plant nutrient elements in the pig manure sewage are concentrated, so that the utilization value is improved.
(5) The liquid fertilizer with high added value is directly produced from the pig manure, and the requirement on the occupied area in the fertilizer production is greatly reduced.
Drawings
FIG. 1 is a schematic flow chart of the pig manure liquid fertilizing treatment method.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a pig manure liquid fertilizing treatment method, which comprises the following steps:
firstly, carrying out solid-liquid separation on the pig manure, obtaining pig manure water and pig manure residues after separation, and enabling the pig manure water to enter a collecting tank (tank) for later use;
removing particles which are harmful to a reverse osmosis membrane from pig manure water in a collecting tank by using a screen 1, and feeding screened liquid into a liquid inlet tank;
clear liquid obtained by processing liquid in the liquid inlet pool (tank) by VSEP (high frequency vibration membrane filtration technology) enters a clear liquid pool (tank) 1, and concentrated liquid enters a concentrated liquid pool (tank);
clear liquid obtained after the liquid in the clear liquid pool (tank) 1 is treated by the reverse osmosis membrane 1 enters the clear liquid pool (tank) 2, and concentrated liquid is returned into the clear liquid pool (tank);
clear liquid in the clear liquid pool (tank) 2 after being treated by the reverse osmosis membrane 2 enters the clear water pool (tank), and concentrated liquid is returned to the clear liquid pool (tank) 1;
the pig manure residues generated by solid-liquid separation are subjected to ultrafine grinding and then are metered into the concentrated solution tank (jar), and a stirrer is arranged in the concentrated solution tank (jar) at the same time, so that the concentrated solution and the fed pig manure residues are stirred and uniformly mixed for effective fermentation. The mixing proportion is determined according to the requirements of making liquid fertilizers, and the proportion of the ingredients can be adjusted by adjusting the conveying speed of each material.
The fermented concentrated solution and the pig manure residue mixture can pass through a corresponding aperture screen 2 according to the standard for preparing liquid fertilizer, the liquid after screening enters a liquid fertilizer matrix pool (tank), and is prepared into corresponding specific liquid fertilizer (water soluble fertilizer, leaf fertilizer or suspension fertilizer) in a mixing pool (tank) according to the requirement for producing the corresponding liquid fertilizer (water soluble fertilizer, leaf fertilizer or suspension fertilizer) and the corresponding nutrient solution added from the nutrient solution pool (tank), and the mixing pool (tank) is provided with a stirrer so as to be fully and uniformly mixed. If the filter residue can not be fully degraded in the screening process, the filter residue flows back to the concentrated solution pool (tank) again for next degradation.
The concentrated liquid tank has slag discharging hole in the bottom for regularly discharging excrement slag hard to degrade, and the small amount of un-degraded excrement slag is fermented and solid-liquid separated before being screened into liquid fertilizer base material tank.
The invention also provides a treatment system for the fattening of the pig manure, which comprises the following steps: the solid-liquid separator is used for carrying out solid-liquid separation on the pig manure; the collecting tank (tank) is connected with the solid-liquid separator and is used for collecting the pig manure water separated by the solid-liquid separator; the screen 1 is connected with the collection tank (tank) and is used for removing particles which are harmful to the reverse osmosis membrane in the liquid in the collection tank (tank); the liquid inlet tank (tank) is connected with the screen mesh 1 and the reverse osmosis membrane 1 and is used for collecting pig manure water screened by the screen mesh 1 and concentrated water treated by the reverse osmosis membrane 1; VSEP connected with the liquid inlet pool (tank) and used for treating liquid in the liquid inlet pool (tank); a clear liquid pool (tank) 1 connected with the VSEP and used for collecting clear liquid treated by the VSEP and concentrated water treated by a reverse osmosis membrane 2; the reverse osmosis membrane 1 is connected with the clear liquid pool (tank) 1 and is used for treating liquid in the clear liquid pool (tank) 1; a clear liquid pool (tank) 2 connected with the reverse osmosis membrane 1 and used for collecting clear liquid treated by the reverse osmosis membrane 1; the reverse osmosis membrane 2 is connected with the clear liquid pool (tank) 2 and is used for treating liquid in the clear liquid pool (tank) 2; the clean water tank is connected with the reverse osmosis membrane 2 and is used for collecting the clean liquid treated by the reverse osmosis membrane 2; a concentrated solution tank (tank) having a stirrer, connected to the solid-liquid separator, VSEP and the following screen 2, for mixing swine waste residue produced by the solid-liquid separator subjected to ultrafine grinding, filter residue sieved by the screen 2, and concentrated water separated by VSEP; the screen 2 is connected with the concentrated solution tank (jar) and is used for screening the fermented mixture in the concentrated solution tank (jar) according to the standard for preparing liquid fertilizer; the liquid fertilizer matrix pool (tank) is connected with the screen 2 and is used for collecting liquid screened by the screen 2; a mixing tank (tank) which is provided with a stirrer, is connected with the liquid fertilizer matrix tank and the nutrient solution tank (tank) and is used for mixing the liquid in the liquid fertilizer matrix tank (tank) and the nutrient solution in the nutrient solution tank (tank) to prepare specific liquid fertilizer; and the nutrient solution pool (tank) is used for providing nutrient solution required for preparing the specific liquid fertilizer.
Preferably, the bottom of the concentrated solution pool (tank) is provided with a slag discharge hole for periodically discharging the difficult-to-degrade fecal slag.
Preferably, the system also comprises another solid-liquid separator, which is used for carrying out solid-liquid separation on the excrement slag which is discharged from the concentrated solution pool (tank) and is difficult to degrade, the separated liquid enters the liquid fertilizer matrix pool (tank) through the screen 2, and as the small amount of the undegraded excrement slag is fully fermented and then is subjected to solid-liquid separation, the liquid enters the liquid fertilizer matrix pool (tank) through the screen, and the solid fermented excrement slag can be directly used for planting crops in fields or flowers and gardens.
Claims (9)
1. A method for treating pig manure liquid manure is characterized by comprising the following steps: the method comprises the following steps:
carrying out solid-liquid separation on the pig manure through a solid-liquid separator to obtain pig manure water and pig manure residues;
screening pig manure water by using a screen 1 to remove particles which are harmful to a reverse osmosis membrane greatly, subjecting the screened liquid to VSEP treatment, subjecting the clear liquid after the VSEP treatment to reverse osmosis membrane 1 treatment, subjecting the clear liquid after the reverse osmosis membrane 1 treatment to reverse osmosis membrane 2 treatment to obtain clear water, returning the concentrated water after the reverse osmosis membrane 1 treatment to VSEP treatment, and returning the concentrated water after the reverse osmosis membrane 2 treatment to reverse osmosis membrane 1 treatment;
ultrafine grinding pig manure residues obtained after solid-liquid separation, uniformly mixing the ground pig manure residues with concentrated water treated by VSEP according to a predetermined ratio, and fermenting to obtain a liquid fertilizer matrix;
and screening the liquid fertilizer matrix through a corresponding aperture screen 2 according to the liquid fertilizer manufacturing standard, and mixing the screened liquid and the added corresponding nutrient solution according to the requirement for producing the corresponding liquid fertilizer to prepare the corresponding specific liquid fertilizer.
2. The method for treating swine waste liquid by fattening as claimed in claim 1, wherein: and adding the pig manure into the filter residue sieved by the screen mesh 1 again for solid-liquid separation.
3. The method for treating swine waste liquid fertilizer according to claim 2, wherein: and if the filter residue which is not fully degraded exists in the screen 2, uniformly mixing the filter residue which is not fully degraded in the screen 2, the pig manure residue obtained after solid-liquid separation and the concentrated water after VSEP treatment according to a preset proportion, and fermenting to obtain the liquid fertilizer matrix.
4. The method for treating swine waste liquid fertilizer according to claim 3, wherein the method comprises:
the pig manure water after solid-liquid separation enters a collecting tank (tank), and pig manure residues are used for later use;
liquid of pig manure water in the collecting tank enters a liquid inlet tank after being screened by a screen mesh 1, and filter residue after screening enters a concentrated liquid tank;
clear liquid obtained after the liquid in the liquid inlet pool (tank) is processed by VSEP enters a clear liquid pool (tank) 1, and concentrated liquid enters a concentrated liquid pool (tank);
clear liquid obtained after the liquid in the clear liquid pool (tank) 1 is treated by the reverse osmosis membrane 1 enters the clear liquid pool (tank) 2, and concentrated liquid is returned into the clear liquid pool (tank);
clear liquid in the clear liquid pool (tank) 2 after being treated by the reverse osmosis membrane 2 enters the clear water pool (tank), and concentrated liquid is returned to the clear liquid pool (tank) 1;
the liquid screened by the screen 2 enters a liquid fertilizer matrix pool (tank), and is mixed into a corresponding specific liquid fertilizer in a mixing pool (tank) according to the proportion of the corresponding liquid fertilizer production requirement and the corresponding added nutrient solution.
5. The method for treating swine waste liquid fertilizer according to claim 4, wherein the method comprises the following steps: the manure residue generated in the concentrated solution tank is subjected to solid-liquid separation by another solid-liquid separator, and the separated liquid enters the liquid manure substrate tank through the screen 2.
6. The method for treating swine waste liquid by fattening as claimed in claim 1, wherein: the predetermined proportion is determined according to the requirements for making liquid fertilizer, and the proportion of the ingredients is adjusted by adjusting the conveying speed of each material.
7. The system for use in the method of fattening treatment of pig manure liquid as claimed in claim 1, wherein: the method comprises the following steps:
the solid-liquid separator is used for carrying out solid-liquid separation on the pig manure;
the collecting tank (tank) is used for collecting the pig manure water separated by the solid-liquid separator;
the screen 1 is used for removing particles which are harmful to the reverse osmosis membrane in the liquid in the collecting tank (tank);
the liquid inlet pool (tank) is used for collecting pig manure water screened by the screen mesh 1 and concentrated water treated by the reverse osmosis membrane 1;
VSEP for treating a liquid in a liquid intake sump (tank);
a clear liquid pool (tank) 1 for collecting clear liquid after VSEP treatment and concentrated water after reverse osmosis membrane 2 treatment;
a reverse osmosis membrane 1 for treating the liquid in the clear liquid tank (tank) 1;
a clear liquid pool (tank) 2 for collecting clear liquid treated by the reverse osmosis membrane 1;
a reverse osmosis membrane 2 for treating the liquid in the clear liquid tank (tank);
the clean water tank is used for collecting the clean liquid treated by the reverse osmosis membrane 2;
a concentrated solution tank (tank) having a stirrer for mixing swine waste residue produced by the solid-liquid separator for ultrafine grinding, filter residue sieved by a screen 2, and concentrated water separated by VSEP;
the screen 2 is used for screening the mixture fermented in the concentrated solution tank according to the standard for preparing the liquid fertilizer;
the liquid fertilizer matrix pool (tank) is used for collecting liquid screened by the screen 2;
a mixing tank (tank) having a stirrer for mixing the liquid in the liquid fertilizer matrix tank (tank) and the nutrient solution in the nutrient solution (tank) to make a specific liquid fertilizer;
and the nutrient solution pool (tank) is used for providing nutrient solution required for preparing the specific liquid fertilizer.
8. The system of claim 7, wherein: the bottom of the concentrated solution pool (tank) is provided with a slag discharge hole for discharging the excrement slag which is difficult to degrade periodically.
9. The system of claim 8, wherein: the device also comprises another solid-liquid separator used for carrying out solid-liquid separation on the excrement slag which is discharged from the concentrated solution pool (tank) and is difficult to degrade through the other solid-liquid separator, and the separated liquid enters the liquid fertilizer matrix pool (tank) through the screen 2.
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| CN113698033A (en) * | 2021-08-19 | 2021-11-26 | 秦皇岛市思嘉特专用汽车制造有限公司 | Livestock and poultry manure recycling treatment system and treatment method |
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Application publication date: 20200922 |