CN113003871A - Liquid dung recovery process and liquid dung recovery system - Google Patents
Liquid dung recovery process and liquid dung recovery system Download PDFInfo
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- CN113003871A CN113003871A CN202110245353.8A CN202110245353A CN113003871A CN 113003871 A CN113003871 A CN 113003871A CN 202110245353 A CN202110245353 A CN 202110245353A CN 113003871 A CN113003871 A CN 113003871A
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Images
Classifications
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/20—Treatment of water, waste water, or sewage by degassing, i.e. liberation of dissolved gases
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/50—Treatment of water, waste water, or sewage by addition or application of a germicide or by oligodynamic treatment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/78—Treatment of water, waste water, or sewage by oxidation with ozone
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/28—Anaerobic digestion processes
- C02F3/2866—Particular arrangements for anaerobic reactors
- C02F3/2873—Particular arrangements for anaerobic reactors with internal draft tube circulation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
Abstract
The invention discloses a fecal sewage recycling process, which comprises the following steps: s1: carrying out solid-liquid separation on the liquid dung, and filtering out sludge in the energy liquid dung; s2: enabling the energy fecal sewage to enter an IC anaerobic tank for anaerobic fermentation to remove organic matters and suspended solids in the energy fecal sewage; s3: carrying out solid-liquid separation on the energy fecal sewage, and filtering out organic matters and suspended solids in the energy fecal sewage; s4: enabling the energy liquid dung to enter an A/O reaction tank, and performing nitrogen removal, phosphorus removal and organic matter degradation on the energy liquid dung; s5: and (4) sterilizing and disinfecting the energy fecal sewage. The fecal sewage recovery process can fully remove organic matters and suspended solids in the fecal sewage and can fully sterilize and disinfect the fecal sewage. In addition, the invention also collects the biogas. And collecting the sludge to be used for preparing organic fertilizer. The invention also discloses a fecal sewage recycling system.
Description
Technical Field
The invention relates to the field of livestock and poultry liquid dung treatment, in particular to a liquid dung recovery process and a liquid dung recovery system.
Background
With the development of economy and improvement of living standard of people in China, the consumption number of livestock and poultry products is increased year by year, and the demand of the livestock and poultry products is increased more and more. In the later period of the 20 th century and the 80 th century, livestock and poultry breeding in China is rapidly developed, the breeding scale, breeding mode and distribution area of livestock and poultry breeding are greatly changed, and the livestock and poultry breeding mode is gradually changed from initial free-ranging to intensive and large-scale breeding. Meanwhile, the development of large-scale livestock and poultry farms meets a large amount of demands of residents on meat and poultry egg food on one hand, and brings certain environmental pollution on the other hand. The livestock and poultry dung water with large amount, high concentration, high ammonia nitrogen, high suspended matter and great treatment difficulty generated by the livestock and poultry farms becomes an important pollution source of polluted water.
At present, a great number of technical means are available at home and abroad aiming at the treatment of the liquid dung, and the treatment can be roughly classified into a physical and chemical treatment technology, a biological treatment technology and an artificial wetland treatment technology. However, these techniques cannot sufficiently recover energy in the fecal water and are poor in purification effect.
Therefore, how to design a fecal sewage recovery process, which can significantly purify the fecal sewage and fully recover the energy in the fecal sewage, is a critical problem to be solved by those skilled in the art.
Disclosure of Invention
The invention aims to fully purify the liquid dung and fully recover the energy in the liquid dung. In order to achieve the purpose, the invention provides the following technical scheme:
a fecal sewage recycling process comprises the following steps:
s1: carrying out solid-liquid separation on the liquid dung, and filtering out sludge in the liquid dung;
s2: allowing the liquid dung to enter an IC anaerobic tank for anaerobic fermentation to remove organic matters and suspended solids in the liquid dung;
s3: carrying out solid-liquid separation on the liquid dung, and filtering out organic matters and suspended solids in the liquid dung;
s4: enabling the liquid dung to enter an A/O reaction tank, and carrying out nitrogen removal, phosphorus removal and organic matter degradation on the liquid dung;
s5: and (4) sterilizing and disinfecting the liquid dung.
Preferably, the S5 specifically includes the following steps:
s51: enabling the liquid dung to enter an MBR (membrane bioreactor) tank, and carrying out solid-liquid separation, bacteria removal and disinfection on the liquid dung by the MBR tank;
s52: enabling the liquid dung to enter a super filter, and further sterilizing and disinfecting the liquid dung by the super filter;
s53: and enabling the liquid dung to enter an ozone disinfection tank, and carrying out decoloration, deodorization and disinfection on the liquid dung by the ozone disinfection tank.
Preferably, in the step S1, the liquid manure is subjected to solid-liquid separation by using a trommel screen.
Preferably, in the step S3, a floatation device is used to perform solid-liquid separation on the liquid dung.
Preferably, the S1 filtered sludge is extruded into organic fertilizer raw materials.
Preferably, the sludge produced by the IC anaerobic tank in the S2 and the sludge produced by the air floatation device in the S3 are extruded into organic fertilizer raw materials.
Preferably, the sludge generated by the MBR tank in S51 is extruded into organic fertilizer raw materials.
Preferably, biogas generated by the IC anaerobic tank in S2 is made to enter a biogas collection device.
Preferably, the concentrated water produced from the ultrafiltration tank in S52 is mixed with the fecal water without solid-liquid separation in S1.
The invention also provides a fecal sewage recycling system, which comprises a drum sieve, an IC anaerobic tank, an air floatation device, an A/O reaction tank and a purification system which are sequentially communicated;
the drum screen is used for carrying out solid-liquid separation on the liquid dung;
the IC anaerobic tank is used for removing organic matters and suspended solids in the excrement;
the air floatation equipment is used for carrying out solid-liquid separation on the liquid dung;
the A/O reaction tank is used for performing nitrogen removal, phosphorus removal and organic matter degradation on the liquid dung;
the purification system is used for sterilizing and disinfecting the liquid dung.
Preferably, the purification system comprises an MBR tank, an ultrafiltration tank and an ozone disinfection tank which are communicated in sequence;
the MBR tank is used for carrying out solid-liquid separation, bacteria removal and disinfection on the liquid dung;
the super filter further performs degerming and disinfection on the liquid dung;
the ozone disinfection tank is used for decoloring, deodorizing and disinfecting the liquid dung.
Preferably, the sludge treatment device further comprises an extruder, wherein the extruder is communicated with the drum screen through a first sludge pipeline.
Preferably, the integrated air floatation device further comprises a spiral shell stacking machine, wherein the spiral shell stacking machine is communicated with the IC anaerobic tank through a second sludge pipeline, communicated with the air floatation device through a third sludge pipeline and communicated with the MBR tank through a fourth sludge pipeline.
Preferably, the system further comprises a biogas collecting device, and the biogas collecting device is communicated with a biogas outlet of the IC anaerobic tank through a biogas pipeline.
Preferably, the super filter is communicated with the inlet of the drum screen through a concentrated water return pipe.
Preferably, the MBR tank comprises a plurality of mutually communicated small tanks, and membrane racks are placed in the small tanks.
According to the technical scheme, the liquid dung is sequentially arranged as follows: solid-liquid separation of a drum screen, removal of organic matters and suspended solids in an IC anaerobic tank, solid-liquid separation of air floatation equipment, removal of organic matters and nitrogen and phosphorus in an A/O tank, sterilization and disinfection of an MBR tank, sterilization and super-filtration of a filter tank, and decoloration, sterilization and disinfection of an ozone sterilization tank. The fecal sewage recovery process can fully remove organic matters and suspended solids in the fecal sewage, and can fully sterilize and disinfect the fecal sewage, so that the fecal sewage is fully purified. In addition, the invention also collects the biogas generated by the IC anaerobic tank. And extruding and collecting sludge generated by the drum screen, the IC anaerobic tank, the air floatation equipment and the MBR tank so as to produce organic fertilizer. In conclusion, the liquid dung recovery process can not only fully purify liquid dung, but also fully recover available energy.
Drawings
In order to more clearly illustrate the solution of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the description below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without inventive efforts.
Fig. 1 is a flow chart of a fecal sewage recovery process according to an embodiment of the present invention.
Detailed Description
The invention discloses a liquid dung recovery process, which can fully purify liquid dung and fully recover energy in the liquid dung. The invention also discloses a fecal sewage recovery system.
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 of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
The fecal sewage recycling process comprises the following steps:
s1: and (4) carrying out solid-liquid separation on the liquid dung, and filtering out sludge in the liquid dung.
In the step, a drum sieve is preferably adopted to carry out solid-liquid separation on the liquid dung. The drum screen has the advantages of high overall reliability, less one-time investment, simple structure, convenient maintenance, difficult blockage of screen holes, capability of sealing a screening barrel and the like. Each pipeline is matched with two trommel screens, so that the unit is sealed and water is pumped to directly enter the trommel screens for solid-liquid separation treatment. After solid-liquid separation by a drum sieve, the produced liquid dung enters an IC anaerobic tank, and the produced sludge enters an extruder. The extruder carries out three-stage extrusion on the sludge, and the sludge is extruded into the organic fertilizer raw material. And then the organic fertilizer raw materials can be sent to an organic fertilizer plant for producing the organic fertilizer.
It should be noted that the liquid dung generated by the extruder in the process of extruding the sludge flows into the IC anaerobic tank through a pipeline.
S2: and (3) allowing the liquid dung to enter an IC anaerobic tank for anaerobic fermentation to remove organic matters and suspended solids in the liquid dung.
An IC (internal circulation) reactor is arranged in the IC anaerobic tank, and the IC reactor is a new generation of high-efficiency anaerobic reactor, namely an internal circulation anaerobic reactor. Anaerobic activated sludge is mainly concentrated at the bottom of the anaerobic tank, so that more biogas can be generated at the bottom, the biogas rises together with water in the rising process, and is collected in the gas collecting hood after meeting the gas collecting hood, and the top end of the gas collecting hood is connected with the riser pipe. The gas lifts with the water due to the large buoyancy and is discharged out of the riser pipe when rising to the top. And the liquid returns to the bottom of the anaerobic tank along with a return pipe. The IC reactor is mainly different from other anaerobic reactors in that the IC reactor is provided with an internal circulation system, and the generated methane generates an internal circulation for the lifting action of the mixed liquid, so that the consumption of external power is not needed. After the liquid dung passes through the IC anaerobic tank, a part of organic matters and suspended solids in the liquid dung are separated out.
And (3) allowing sludge discharged from the IC anaerobic tank to enter a screw stacking machine, extruding the sludge by the screw stacking machine, and extruding the sludge into an organic fertilizer raw material. The stack snail machine has strong decontamination capability, is easy to separate and can not be blocked. Belongs to environment protection type, no odor and no noise, and is suitable for dewatering high and low concentration sludge.
It is noted that biogas generated by the IC anaerobic tank is collected in a biogas collection device to be utilized.
S3: and (4) carrying out solid-liquid separation on the liquid dung, and filtering out organic matters and suspended solids in the liquid dung.
After the fecal sewage is subjected to anaerobic fermentation in the IC anaerobic tank, solid-liquid separation is carried out again, so that suspended solids and organic matters in the fecal sewage are filtered out in a sludge mode. In the invention, the solid-liquid separation of the liquid dung is preferentially carried out by adopting an air floatation device.
The air floatation equipment is an air floatation device integrating flocculation, air floatation, skimming and mud scraping, and is a water treatment equipment which utilizes the buoyancy of bubbles to make air float on the water surface so as to realize solid-liquid separation, wherein the water treatment equipment has low suspended substance in effluent and high solid content in slag. Different waste water's pollutant concentration is different, in the actual coagulation process, adds the medicine volume and need pass through the test and survey step by step, gets the best effect, the lower medicine volume combination of adding of cost.
S4: and (3) enabling the liquid dung to enter an A/O reaction tank, and performing nitrogen removal, phosphorus removal and organic matter degradation on the liquid dung.
After the liquid dung is treated by the air floatation equipment, the generated sludge can enter the screw stacking machine and is extruded into the organic fertilizer raw material by the screw stacking machine. The produced liquid dung enters the A/O reaction tank. The A/O is the abbreviation of antioxidant/Oxic, and has the advantage of having certain functions of nitrogen and phosphorus removal besides degrading organic pollutants.
Decomposing nitrogen-containing organic matters into ammonia by bacteria under the aerobic condition, further converting the ammonia into nitrite under the action of aerobic autotrophic nitrosobacteria, and converting the ammonia into nitrate under the action of aerobic autotrophic nitrobacteria, so as to finish the nitration reaction. Under the anoxic condition, the facultative heterotrophic bacteria utilize or partially utilize organic carbon source in sewage as electron donor, nitrate replaces molecular oxygen as electron acceptor, and anaerobic respiration is performed to decompose organic matter, and nitrogen in the nitrate is reduced into gaseous nitrogen, so that denitrification reaction is completed. The A/O process can not only obtain satisfactory denitrification effect, but also obtain high COD and BOD removal rate through the anoxic-aerobic cyclic operation.
S5: and (5) sterilizing and disinfecting the liquid dung.
After passing through the A/O reaction tank, the liquid dung enters the final treatment stage: and (5) sterilizing and disinfecting the liquid dung. In order to ensure the effect of the purification, the invention is particularly provided with the following three steps:
s51: and (4) enabling the fecal sewage to enter an MBR (membrane bioreactor) tank, and carrying out solid-liquid separation, bacterium removal and disinfection on the fecal sewage by the MBR tank.
MBR (Membrane Bioreactor) tanks are capable of removing most of the bacteria and viruses in the liquid manure. The MBR tank can be independently arranged, and can also be arranged together with the aerobic tank in the A/O reaction tank on the wall.
The MBR tank is divided into a plurality of small tanks, and the small tanks are used for placing the membrane frame. The membrane frame is used for treating liquid dung. When a single membrane frame is maintained or cleaned, only the small pool where the membrane frame is located needs to be stopped, and the whole process is not stopped, so that the operation efficiency is improved.
The sludge generated by the MBR tank enters the spiral shell stacking machine and is extruded by the spiral shell stacking machine to be used as an organic fertilizer raw material.
S52: and (3) enabling the liquid dung to enter an ultra-filtration tank, and further sterilizing and disinfecting the liquid dung by the ultra-filtration tank.
The super filter is a membrane separation device which can purify and separate solution and is used for further sterilizing and disinfecting the liquid dung.
And after MBR, performing secondary filtration by using an ultrafiltration tank with the aperture of 30nm to further intercept bacterial viruses. The super filter tank consists of a water inlet pump, a security filter, a hollow fiber ultrafiltration membrane component, a backwashing water pump, an automatic valve, a flow meter, a pressure gauge, an electric cabinet and the like.
The ultrafiltration filter takes the pressure difference between two sides of the membrane as a driving force, takes the ultrafiltration membrane as a filter medium, and under a certain pressure, when a stock solution flows across the surface of the membrane, a plurality of fine micropores densely distributed on the surface of the ultrafiltration membrane only allow water and small molecular substances to pass through to become a permeate (clear water) and be discharged from a middle pipeline, while substances with larger particle diameters in the stock solution are intercepted on the liquid inlet side of the membrane to become a concentrated solution, and the concentrated solution is discharged from the uppermost pipeline, so that the purification of the stock solution is realized.
It should be noted that the concentrate produced by the ultrafiltration tank is communicated with the inlet of the rotary screen through a concentrate return pipe. Namely, the concentrated water generated by the ultrafiltration pond needs to be subjected to a series of purification treatment again.
S53: the liquid dung enters an ozone disinfection tank, and the ozone disinfection tank decolors, deodorizes and disinfects the liquid dung.
Ozone is a high-efficiency clean strong oxidant, has stronger sterilization capability than chlorine, and has no secondary pollutant in reaction. With the continuous perfection of ozone generation technology and advanced oxidation technology, the application of ozone generation technology and advanced oxidation technology in advanced treatment is more and more common. Ozone directly acts with bacteria and viruses to destroy organelles, DNA and RNA of the bacteria, so that metabolism of the bacteria is destroyed, the bacteria die, and biological safety can be guaranteed.
The ozone disinfection tank comprises an ozone generating device and an ozone oxidizing device, wherein the ozone generating device is in a container form and internally provided with an air compressor, an oxygen generator, an ozone generator and a tail gas destructor. The ozone oxidation equipment comprises an ozone catalytic oxidation tower, a high-efficiency gas dissolving device, a circulating water pump and the like.
In summary, in the invention, the liquid dung is arranged as follows: solid-liquid separation of a drum screen, removal of organic matters and suspended solids in an IC anaerobic tank, solid-liquid separation of air floatation equipment, removal of organic matters and nitrogen and phosphorus in an A/O tank, sterilization and disinfection of an MBR tank, sterilization and super-filtration of a filter tank, and decoloration, sterilization and disinfection of an ozone sterilization tank. The fecal sewage recovery process can fully remove organic matters and suspended solids in the fecal sewage, and can fully sterilize and disinfect the fecal sewage, so that the fecal sewage is fully purified. In addition, the invention also collects the biogas generated by the IC anaerobic tank. And extruding and collecting sludge generated by the drum screen, the IC anaerobic tank, the air floatation equipment and the MBR tank so as to produce organic fertilizer. In conclusion, the liquid dung recovery process can not only fully purify liquid dung, but also fully recover available energy.
The invention also discloses a fecal sewage recycling system, which comprises the drum sieve, the IC anaerobic tank, the air floatation device, the A/O reaction tank and the purification system which are sequentially communicated. And the trommel screen performs solid-liquid separation on the liquid dung. The IC anaerobic tank is used for removing organic matters and suspended solids in the excrement. The air floatation equipment is used for carrying out solid-liquid separation on the liquid dung. The A/O reaction tank is used for carrying out nitrogen removal, phosphorus removal and organic matter degradation on the liquid dung. The purification system is used for sterilizing and disinfecting the liquid dung.
Specifically, the purification system comprises an MBR tank, an ultrafiltration tank and an ozone disinfection tank which are communicated in sequence. And the MBR tank is used for carrying out solid-liquid separation, bacteria removal and disinfection on the liquid dung. The super filter tank further sterilizes and disinfects the liquid dung. The ozone disinfection tank is used for decoloring, deodorizing and disinfecting the liquid dung.
It should be noted that the ultrafiltration tank is communicated with the inlet of the drum screen through a concentrated water return pipe to purify the concentrated water again.
It should be further noted that the MBR tank includes a plurality of small tanks connected with each other, and the small tanks are used for placing the membrane frame. The membrane frame is used for treating liquid dung. When a single membrane frame is maintained or cleaned, only the small pool where the membrane frame is located needs to be stopped, and the whole process is not stopped, so that the operation efficiency is improved.
The liquid dung recycling system further comprises an extruder and a screw stacking machine, and the extruder is communicated with the drum screen through a first sludge pipeline. The spiral shell stacking machine is communicated with the IC anaerobic tank through a second sludge pipeline, communicated with the air floatation device through a third sludge pipeline and communicated with the MBR tank through a fourth sludge pipeline.
The liquid dung recycling system also comprises a biogas collecting device which is communicated with a biogas outlet of the IC anaerobic tank through a biogas pipeline and is used for collecting biogas generated by the IC anaerobic tank.
Finally, it should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (16)
1. A fecal sewage recycling process is characterized by comprising the following steps:
s1: carrying out solid-liquid separation on the liquid dung, and filtering out sludge in the liquid dung;
s2: allowing the liquid dung to enter an IC anaerobic tank for anaerobic fermentation to remove organic matters and suspended solids in the liquid dung;
s3: carrying out solid-liquid separation on the liquid dung, and filtering out organic matters and suspended solids in the liquid dung;
s4: enabling the liquid dung to enter an A/O reaction tank, and carrying out nitrogen removal, phosphorus removal and organic matter degradation on the liquid dung;
s5: and (4) sterilizing and disinfecting the liquid dung.
2. The fecal sewage recycling process of claim 1, wherein the S5 specifically comprises the following steps:
s51: enabling the liquid dung to enter an MBR (membrane bioreactor) tank, and carrying out solid-liquid separation, bacteria removal and disinfection on the liquid dung by the MBR tank;
s52: enabling the liquid dung to enter a super filter, and further sterilizing and disinfecting the liquid dung by the super filter;
s53: and enabling the liquid dung to enter an ozone disinfection tank, and carrying out decoloration, deodorization and disinfection on the liquid dung by the ozone disinfection tank.
3. The fecal sewage recycling process of claim 1, wherein in the step S1, the fecal sewage is solid-liquid separated by using a trommel screen.
4. The fecal sewage recycling process of claim 1, wherein in the step S3, the fecal sewage is subjected to solid-liquid separation by using an air flotation device.
5. The fecal sewage recycling process of claim 1, wherein the S1 filtered sludge is extruded into organic fertilizer raw material.
6. The fecal sewage recycling process of claim 4, wherein the sludge produced by the IC anaerobic tank in S2 and the sludge produced by the air floatation device in S3 are extruded into organic fertilizer raw materials.
7. The fecal sewage recycling process of claim 2, wherein the sludge produced by the MBR tank in S51 is extruded into organic fertilizer raw material.
8. The fecal water reuse process of claim 1, characterized in that the biogas generated by the IC anaerobic tank in S2 is passed to a biogas collection device.
9. The process of recycling fecal water according to claim 2, wherein the concentrate produced by the ultrafiltration tank in S52 is mixed with the fecal water without solid-liquid separation in S1.
10. A fecal sewage recycling system is characterized by comprising a drum sieve, an IC anaerobic tank, an air floatation device, an A/O reaction tank and a purification system which are sequentially communicated;
the drum screen is used for carrying out solid-liquid separation on the liquid dung;
the IC anaerobic tank is used for removing organic matters and suspended solids in the excrement;
the air floatation equipment is used for carrying out solid-liquid separation on the liquid dung;
the A/O reaction tank is used for performing nitrogen removal, phosphorus removal and organic matter degradation on the liquid dung;
the purification system is used for sterilizing and disinfecting the liquid dung.
11. The fecal sewage reuse system of claim 10, wherein the purification system comprises an MBR tank, an ultrafiltration tank and an ozone disinfection tank which are connected in sequence;
the MBR tank is used for carrying out solid-liquid separation, bacteria removal and disinfection on the liquid dung;
the super filter further performs degerming and disinfection on the liquid dung;
the ozone disinfection tank is used for decoloring, deodorizing and disinfecting the liquid dung.
12. The fecal water reuse system of claim 10, further comprising an extruder in communication with the trommel through a first sludge conduit.
13. The fecal water reuse system of claim 11, further comprising a stack screw machine, wherein the stack screw machine is communicated with the IC anaerobic tank through a second sludge pipeline, communicated with the air flotation device through a third sludge pipeline, and communicated with the MBR tank through a fourth sludge pipeline.
14. The fecal water reuse system of claim 10, further comprising a biogas collection device, wherein the biogas collection device is communicated with the biogas outlet of the IC anaerobic tank through a biogas pipeline.
15. The fecal sewage reuse system of claim 10, wherein the super filter is communicated with the inlet of the drum screen through a concentrate return pipe.
16. The fecal water reuse system of claim 11, wherein the MBR tank comprises a plurality of small tanks connected with each other, and the small tanks are used for placing membrane racks.
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