CN115180769A - Pollutant treatment system for dairy cattle breeding - Google Patents
Pollutant treatment system for dairy cattle breeding Download PDFInfo
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- CN115180769A CN115180769A CN202210829594.1A CN202210829594A CN115180769A CN 115180769 A CN115180769 A CN 115180769A CN 202210829594 A CN202210829594 A CN 202210829594A CN 115180769 A CN115180769 A CN 115180769A
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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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- 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
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
-
- 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
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
-
- 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
- C02F2001/007—Processes including a sedimentation step
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/20—Nature of the water, waste water, sewage or sludge to be treated from animal husbandry
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/04—Disinfection
-
- 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
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The application discloses milk cow feeding pollutant processing system includes: the device comprises a solid-liquid separation treatment unit, a biochemical treatment unit and a disinfection treatment unit which are connected in sequence, wherein the solid-liquid separation treatment unit comprises a plurality of sedimentation tanks arranged in a matrix manner, the bottom of each sedimentation tank is provided with a slurry inlet and a sludge outlet, and a sludge transport vehicle is arranged at the position of each sludge outlet; the biochemical treatment unit is including the equalizing basin that connects gradually, thoughtlessly congeal the pond, the anaerobic reaction pond, distribution tank and AO pond, be provided with aeration equipment and heating device in the equalizing basin, install first agitating unit in the coagulation pond, the import and the export in anaerobic reaction pond all are provided with the hydraulic control valve, be provided with second agitating unit in the AO pond, wherein, the bottom in coagulation pond, anaerobic reaction pond all is equipped with the sludge outlet, all be connected with out the silt pipe on the sludge outlet, it is connected with the sludge impoundment to go out the silt pipe.
Description
Technical Field
The application relates to the technical field of pollutant treatment systems, in particular to a pollutant treatment system for dairy cattle raising.
Background
The animal husbandry is one of the major components of agriculture. At present, animal breeding mainly comprises: livestock husbandry for raising domestic animals and fowls such as pig, cattle, sheep, horse, donkey, mule, chicken, duck, goose, etc.; and aquaculture industry for breeding aquatic animals such as fish and shrimp. Further, silkworm breeding, bee breeding, and the like are also available. Cows in livestock farming are an important breeding industry development industry. A large amount of waste gas, animal wastes and other liquid pollutants are generated in the process of cow breeding, and if the pollutants are stacked in a breeding area for a long time, the health of livestock breeding is directly influenced without treatment, and the adverse effect is caused on the surrounding environment.
Therefore, the application provides a cow feeding pollutant treatment system to solve the problems.
Disclosure of Invention
The application provides a pollutant processing system is raised to milk cow has solved the liquid pollutant in the current livestock-raising and if stack in the breed district for a long time, does not handle the health that will directly influence the poultry, causes harmful effects's problem to the surrounding environment.
In order to solve the technical problem, the application provides a pollutant processing system for dairy cattle raising, including: a solid-liquid separation treatment unit, a biochemical treatment unit and a disinfection treatment unit which are connected in sequence,
the solid-liquid separation treatment unit comprises a plurality of sedimentation tanks arranged in a matrix manner, the bottom of each sedimentation tank is provided with a slurry inlet and a sludge outlet, and a sludge outward-carrying vehicle is mounted at the position of each sludge outlet;
the biochemical treatment unit comprises an adjusting tank, a coagulation tank, an anaerobic reaction tank, a water distribution tank and an A/O tank which are connected in sequence, wherein an aeration device and a heating device are arranged in the adjusting tank, a first stirring device is arranged in the coagulation tank, a hydraulic control valve is arranged at an inlet and an outlet of the anaerobic reaction tank, a second stirring device is arranged in the A/O tank, sludge outlets are arranged at the bottoms of the coagulation tank and the anaerobic reaction tank, sludge outlet pipes are connected to the sludge outlets, and the sludge outlet pipes are connected with the sludge tank;
the disinfection treatment unit comprises a disinfection tank, and the disinfection tank is connected with a discharge water tank.
As a further scheme, each sedimentation tank is internally provided with a filtrate net which is arranged in the horizontal direction.
As a further scheme, the upper end in the sludge tank is provided with a liquid outlet pipe, the liquid outlet pipe is connected with an inlet of the adjusting tank, and a sludge concentration sensor is arranged above the liquid outlet pipe.
As a further scheme, the sewage treatment device further comprises a secondary sedimentation tank arranged between the disinfection tank and the A/O tank, one end of the secondary sedimentation tank is connected with the sludge tank through a sludge discharge pipe, and the other end of the secondary sedimentation tank is connected with the A/O tank through a return pipe.
As a further scheme, the device also comprises a membrane treatment unit, wherein the membrane treatment unit is positioned between the disinfection tank and the secondary sedimentation tank;
the membrane treatment unit comprises an MBR membrane component, an active carbon filter, a reverse osmosis membrane component, a nanofiltration membrane treatment component and a clean water tank which are sequentially connected, wherein a water inlet of the MBR membrane component is communicated with a water outlet of the secondary sedimentation tank, and an outlet of the clean water tank is communicated with an inlet of the disinfection tank.
As a further scheme, the first stirring device comprises a first stirring motor, the first stirring motor is connected with a first stirring shaft, and the first stirring shaft is connected with a first stirring blade with a spiral structure.
As a further scheme, the second stirring device comprises a second stirring motor, a second stirring shaft is connected to the second stirring motor, and a second stirring blade arranged in the horizontal direction is connected to the second stirring shaft.
As a further aspect, the heating device includes an air heat source pump installed in the conditioning tank.
Compared with the prior art, the dairy cattle breeding pollutant treatment system provided by the invention can be used for performing multi-stage high-efficiency treatment on liquid waste in livestock breeding, the treated water quality can reach the agricultural irrigation water quality standard, the influence of polluted liquid on the environment is continuously avoided, and the effect of water recycling can be achieved.
Drawings
In order to more clearly explain the technical solution of the present application, the drawings needed to be used in the embodiments are briefly described below, and it is obvious for those skilled in the art to obtain other drawings without making any inventive changes.
FIG. 1 is a process flow diagram of a system for treating contaminants in dairy cattle feeding water according to the present invention;
FIG. 2 is a schematic structural view of a first stirring device provided in the present invention;
FIG. 3 is a schematic structural view of a second stirring device provided in the present invention;
fig. 4 is a schematic structural diagram of a sedimentation tank provided by the present invention.
In the figure: 1. a sedimentation tank; 2. a regulating tank; 3. a coagulation tank; 4. an anaerobic reaction tank; 5. a water distribution tank; 6. an A/O pool; 7. a sludge tank; 8. a disinfection tank; 9. draining the water tank; 10. an MBR membrane module; 11. an activated carbon filter; 12. a reverse osmosis membrane module; 13. a nanofiltration membrane treatment component; 14. a clean water tank; 15. a secondary sedimentation tank; 16. an aeration device; 101. a first stirring motor; 102. a first stirring shaft; 103. a first stirring blade; 201. a second stirring motor; 203. a second stirring shaft; 204. and a second stirring blade.
Detailed Description
In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments.
The core of this application is to provide a pollutant processing system is raised to milk cow, and this system can carry out the efficient to the liquid pollutant that produces in the livestock-raising, makes water can recycle.
FIG. 1 is a process flow diagram of a system for treating contaminants in dairy cattle feeding water according to the present invention; FIG. 2 is a schematic structural view of a first stirring device provided in the present invention; fig. 3 is a schematic structural view of a second stirring device provided by the present invention.
As shown in fig. 1 to 4, the present invention provides a contaminant treatment system for dairy cattle rearing, comprising: the device comprises a solid-liquid separation treatment unit, a biochemical treatment unit and a disinfection treatment unit which are connected in sequence, wherein the solid-liquid separation treatment unit comprises a plurality of sedimentation tanks 1 arranged in a matrix manner, the bottom of each sedimentation tank 1 is provided with a slurry inlet and a sludge outlet, and a sludge transport vehicle is arranged at the position of each sludge outlet; the biochemical treatment unit comprises an adjusting tank 2, a coagulation tank 3, an anaerobic reaction tank 4, a distribution tank 5 and an A/O tank 6 which are connected in sequence, wherein an aeration device and a heating device are arranged in the adjusting tank 2, a first stirring device is arranged in the coagulation tank 3, a hydraulic control valve is arranged at an inlet and an outlet of the anaerobic reaction tank 4, a second stirring device is arranged in the A/O tank 6, sludge outlets are arranged at the bottoms of the coagulation tank 3 and the anaerobic reaction tank 4, sludge outlet pipes are connected to the sludge outlets, and the sludge outlet pipes are connected with a sludge tank 7; the sterilization treatment unit includes a sterilization tank 8, and the sterilization tank 8 is connected to a drain tank 9.
In this embodiment, each sedimentation tank 1 is provided with a filtrate net, and the filtrate nets are all arranged in a horizontal direction.
In this embodiment, the upper end in the sludge impoundment 7 is provided with the drain pipe, the access connection of drain pipe and equalizing basin 2, and the top of drain pipe is provided with mud concentration sensor.
In the embodiment, the device further comprises a secondary sedimentation tank 15 arranged between the disinfection tank 8 and the A/O tank 6, one end of the secondary sedimentation tank 15 is connected with the sludge tank 7 through a sludge discharge pipe, and the other end of the secondary sedimentation tank 15 is connected with the A/O tank 6 through a return pipe.
In the embodiment, the device also comprises a membrane treatment unit, wherein the membrane treatment unit is positioned between the disinfection tank 8 and the secondary sedimentation tank 15;
the membrane treatment unit comprises an MBR membrane component 10, an active carbon filter 11, a reverse osmosis membrane component 12, a nanofiltration membrane treatment component 13 and a clean water tank 14 which are connected in sequence, wherein the water inlet of the MBR membrane component 10 is communicated with the water outlet of the secondary sedimentation tank 1, and the outlet of the clean water tank 14 is communicated with the inlet of the disinfection tank 8.
In this embodiment, the first stirring device includes a first stirring motor 101, a first stirring shaft 102 is connected to the first stirring motor 101, and a first stirring blade 103 having a spiral structure is connected to the first stirring shaft 102.
In this embodiment, the second stirring device includes a second stirring motor 201, a second stirring shaft 203 is connected to the second stirring motor 202, and a second stirring blade 204 horizontally disposed is connected to the second stirring shaft 203.
In the present embodiment, the heating means includes an air heat source pump installed in the conditioning tank 2.
In this example, the wastewater in the livestock farm was first analyzed, and the specific wastewater treatment process is shown in table 1.
TABLE 1
Determining the water quality in the livestock farm to be COD through the analysis of the waste water: 4357mg/L, BOD5:1585mg/L, SS:1329mg/L, NH3-N:305mg/L, TP:43mg/L.
Meanwhile, the results of monitoring the discharge amount of wastewater and pollutants are shown in Table 2
TABLE 2
Aiming at the monitoring result, the invention provides a treatment system of wastewater pollutants, which adopts a harmless technology of a sedimentation tank → a regulating tank → a coagulation tank → an anaerobic reaction tank → a distribution tank → an A/O tank → a secondary sedimentation tank → a disinfection → a discharge tank for a wastewater treatment process, the total removal efficiency of COD (chemical oxygen demand) of the wastewater treated by the technology can reach more than 95 percent, and the system has the following advantages: high-concentration organic wastewater can be treated; the investment cost is low, the energy consumption is low, and the operation cost is low; the impact load resistance is high; good effluent quality, stable operation, convenient management and the like.
Also directed to the processing system, the method comprises the following steps:
firstly, introducing wastewater into a sedimentation tank 1 through a sewage discharge pipeline, and settling for more than 24 hours;
because sedimentation tank 1 is the matrix setting (as shown in fig. 4), consequently enlarged the area of deposiing, the sedimentation tank who sets up alone in addition deposits waste water in independent space, can carry out the sedimentation treatment according to the handling capacity suction of actual waste water to the sedimentation tank of corresponding quantity in, the efficiency of the processing of improvement.
Because the cow dung particle suspended matter content of the effluent of the milking parlor is very high, a plurality of sedimentation tanks are arranged, so that a large amount of cow dung particles in the wastewater are precipitated and removed, partial organic matters can be removed, and the load of a subsequent biochemical treatment unit is reduced.
And step two, the supernatant liquid after the precipitation treatment automatically flows into the adjusting tank 2, the adjusting tank 2 is heated and insulated when the temperature is lower than 10 ℃ (for preventing the anaerobic reaction from running normally when the temperature is too low in winter), a pH adjusting liquid is injected into the adjusting tank 2, and when the pH value reaches 7-8, the aeration treatment is continuously carried out by using the aeration device 16, so that the adjusting efficiency is increased. The production wastewater enters the regulating tank, and the quality and the quantity of the treated wastewater are balanced and regulated by utilizing the characteristics of the regulating tank and staying for a certain time, so that the stable operation of a subsequent treatment unit is ensured. The aeration treatment ensures the balance effect, prevents dead angle deposition, and can play a certain role in biochemical treatment in advance to remove part of organic matters. A heating device is arranged in the pool to heat the wastewater and keep the temperature of the wastewater, and a heat source is in a combined heating mode of solar energy and an air heat source pump.
And thirdly, conveying the liquid in the regulating reservoir 1 into a coagulation reservoir 3 through a pipeline, adding flocculating agents PAC and PAM into the coagulation reservoir 3, continuously stirring by using a first stirring device, and stopping stirring after the liquid reaches a coagulation state (manual observation).
Flocculating agents PAC and PAM are added into the wastewater in the coagulation tank 3, so that particles which are difficult to precipitate in the precipitated wastewater are mutually polymerized to form colloid, and then are combined with impurities in a water body to form a larger flocculating constituent. The flocculating constituent has strong adsorption capacity, can not only adsorb suspended matters, but also can adsorb partial bacteria and soluble substances, and the flocculating constituent sinks through adsorption and volume increase, thereby achieving the purpose of removing suspended matters, COD and BOD 5. Meanwhile, the load of the subsequent units is reduced, the separated sludge is discharged to a sludge tank, and clear liquid automatically flows into an anaerobic reaction tank 4.
Fourthly, the wastewater in the anaerobic reaction tank 4 is treated for 5 to 10 hours.
In this step, a method for purifying wastewater by degrading organic pollutants in the wastewater using anaerobic microorganisms. The mechanism is that organic matters in the sludge are decomposed under the action of anaerobic bacteria, and finally, gases such as methane, carbon dioxide and the like are generated. The complete anaerobic digestion process can be divided into three stages:
the first stage is as follows: dissolving solid organic compounds in the sludge by virtue of extracellular hydrolase secreted from anaerobic bacteria, allowing the dissolved solid organic compounds to enter cells through cell walls, and hydrolyzing polysaccharide, protein and fat into monosaccharide, amino acid, fatty acid and the like under the catalysis of the hydrolase;
and a second stage: under the action of acid-producing bacteria, the product in the first stage is further degraded into simpler volatile organic acids such as acetic acid, propionic acid, butyric acid and the like;
and a third stage: and under the action of methane bacteria, converting the volatile acid generated in the second stage into methane and carbon dioxide. The influencing factors include temperature, pH value, nutrients, organic toxicants, anaerobic environment and the like. The anaerobic reaction tank utilizes the first two stages of anaerobic fermentation, namely hydrolysis and acidification, to degrade high molecular organic matters into low molecular organic matters by controlling the hydraulic retention time, so as to be beneficial to the subsequent aerobic treatment. The hydrolysis acidification process does not need strict anaerobic conditions, so the operation conditions are easy to control, the retention time is short (generally several hours, while the anaerobic fermentation is about several days), the investment is low, the occupied area is saved, and the method can adapt to higher COD and BOD loads. In the process, the polymer organic matters are degraded into the low-molecular organic acids, so that the biodegradability of the wastewater is improved, the retention time required by subsequent biological treatment is shortened, the energy consumption is reduced, the removal rate of aerobic treatment is improved, and the reduction of foams is greatly facilitated. Because the gas production stage is not reached, the peculiar bad smell of anaerobic fermentation is not generated. The hydrolysis acidification can also hydrolyze suspended solid matters into soluble matters, so that the sludge is treated, the sludge yield is reduced, the dehydration performance of the sludge is improved, and the one-time treatment of sewage and sludge is realized. Compared with UASB, AF and AFBR processes, the anaerobic bioreactor has the advantages of low investment, impact load resistance, strong water temperature change resistance and the like.
And fifthly, distributing water in the distribution tank 5 to accumulate water to be processed in the next step, and when the water in the distribution tank 5 can be sufficiently treated, intensively conveying the water into the A/O tank 6. In the step, the A/O process sewage firstly passes through the section A (anoxic section) to generate denitrification reaction, so that nitrate nitrogen generates nitrogen under the action of denitrifying bacteria to escape from water, organic matters in the water are consumed during the denitrification reaction, the aeration quantity is reduced, the nitrification reaction is facilitated, and a stirring device is arranged at the section to fully mix the mixed liquid. The mixed liquid enters an O section (aerobic section) from the anaerobic section, ammonia nitrogen in the wastewater subjected to nitration reaction generates nitrate nitrogen and removes COD and BOD in the O section, and a mixed liquid reflux pump is arranged to reflux part of the wastewater to the anoxic section. Under the condition of anaerobic and aerobic alternate operation, filamentous fungi cannot be proliferated in a large amount, and the sludge expansion is avoided. Nitrogen contaminants are a major cause of eutrophication of water bodies. With the continuous improvement of domestic environmental protection consciousness and environmental protection technology, higher requirements are also put forward on the control of nitrogen pollutants. In the biological decarbonization and denitrification system, not only organic matters are removed, but also nitrogen-containing substances in the sewage are converted into nitrogen through biological nitrification and denitrification, and finally the nitrogen is removed from the sewage. The biological denitrification comprises the following three processes:
a. in the assimilation process, part of ammonia nitrogen in the sewage is assimilated into new cell substances and is removed in the form of excess sludge;
b. a nitrification process, namely nitrifying bacteria convert ammonia nitrogen into nitrate nitrogen;
c. the denitrification process, i.e. the denitrifying bacteria convert nitrate nitrogen into nitrogen and then release the nitrogen from the wastewater into the atmosphere.
The traditional denitrification system adopts a nitrification process and a denitrification process which are mutually independent, and usually adopts methanol as an external carbon source to remove nitrate. The A/O process combines nitrification and denitrification reactions in one process, and uses a carbon source in wastewater to remove nitrate. The A/O process comprises an anoxic section and an aerobic section, and the functions and process characteristics of each reaction unit are as follows:
the sewage firstly passes through the anoxic section, the function of the section is denitrification, organic matters in the water can be consumed through denitrification, the subsequent load is reduced, the aeration quantity is reduced, the nitrification reaction is facilitated, and nitrate nitrogen is sent by the backflow of the aerobic section. The mixed liquid enters an aerobic section from the anoxic reaction section to remove COD and BOD and carry out nitration reaction.
And then the liquid after the A/O process is conveyed to a secondary sedimentation tank 15 to remove sediments in the treated wastewater, and during operation, sludge is pumped out from the bottom of the secondary sedimentation tank 15. And is pumped into a sludge tank 7 for centralized re-sedimentation. Wherein the settled liquid in the sludge tank 7 can be pumped into the adjusting tank 2 again for secondary treatment. The A/O pool 6 contains a large amount of sludge in the effluent due to the aeration effect, the sludge is intercepted and concentrated by the sedimentation pool, part of the sludge flows back to the anoxic pool (the secondary sedimentation pool 15), and the rest sludge is discharged to the sludge pool. The unit adopts a vertical flow sedimentation tank, and water enters the tank from top to bottom through a water inlet pipe arranged at the center of the tank. The suspended matters are settled and enter a conical sludge settling hopper at the bottom of the tank, and clear water flows out from the periphery of the tank along a peripheral overflow weir. One side of the pool is provided with a mud discharging pipe close to the pool wall, and mud is discharged periodically by hydrostatic pressure.
The membrane treatment unit added in the A/O process comprises an MBR membrane component 10, an active carbon filter 11, a reverse osmosis membrane component 12, a nanofiltration membrane treatment component 13 and a clean water tank 14 which are connected in sequence, wherein the water inlet of the MBR membrane component 10 is communicated with the water outlet of the secondary sedimentation tank 1, and the outlet of the clean water tank 14 is communicated with the inlet of the disinfection tank 8. The purification degree of the waste water can be higher after passing through the membrane treatment unit.
And sixthly, guiding the liquid in the clean water tank 14 into the disinfection tank 8 for disinfection treatment, and guiding the treated water into the discharge water tank 9 for agricultural irrigation.
The treated water was tested in this step, and the test results are shown in table 3;
TABLE 3
The results in Table 4 show that the wastewater treatment process adopted by the invention has strict flow and obvious treatment effect, and the treated water quality can meet the dry farming standard in the Farmland irrigation water quality standard (GB 5084-2005) and the pollutant emission standard in livestock and poultry breeding (GB 18596-2001). The water treated by the method reaches the standard of harmless treatment, and is used for irrigating farmlands and grasslands around enterprises. The discharged sewage is mainly flushing waste water of milking parlors and domestic sewage, has no toxic and harmful substances after advanced treatment, and contains various nutrient components required by crops, such as nitrogen, phosphorus, potassium and the like. The wastewater is used for irrigation after being treated by sewage, so that the physical and chemical properties of soil can be improved, the soil fertility is improved, chemical fertilizers are saved, the crop yield is increased, the growth of crops is facilitated, and a certain promotion effect is provided for the development of peripheral agriculture. And the wastewater is treated and reused for farmland irrigation, so that water resources can be effectively saved, and pollutant discharge amount is reduced. Therefore, the wastewater generated by the invention can be temporarily stored in the drainage pool 9 (6000 m 3) after being treated by the sewage treatment station, and then is conveyed to nearby farmlands for irrigation by a tank car without being directly drained into surface water bodies, so that the surrounding water environment is not obviously influenced. Compared with the prior art, the dairy cattle breeding pollutant treatment system provided by the invention can be used for performing multistage high-efficiency treatment on liquid waste in livestock breeding, the quality of treated water can reach the quality standard of agricultural irrigation water, the influence of polluted liquid on the environment is continuously avoided, and the effect of water recycling can be achieved.
In the description of the application, it is to be understood that the terms "central," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be considered limiting of the application. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate a number of the indicated technical features. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present application, the meaning of "a plurality" is two or more unless otherwise specified.
In the description of the present invention, it should also be noted that, unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice in the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope of the disclosure being indicated by the following claims.
It will be understood that the present application is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The above-described embodiments of the present application do not limit the scope of the present application.
Claims (8)
1. A cow feeding pollutant treatment system, comprising: a solid-liquid separation treatment unit, a biochemical treatment unit and a disinfection treatment unit which are connected in sequence,
the solid-liquid separation treatment unit comprises a plurality of sedimentation tanks arranged in a matrix manner, the bottom of each sedimentation tank is provided with a slurry inlet and a sludge outlet, and a sludge outward-carrying vehicle is arranged at the position of each sludge outlet;
the biochemical treatment unit comprises an adjusting tank, a coagulation tank, an anaerobic reaction tank, a distribution tank and an A/O tank which are connected in sequence, wherein an aeration device and a heating device are arranged in the adjusting tank, a first stirring device is arranged in the coagulation tank, hydraulic control valves are arranged at the inlet and the outlet of the anaerobic reaction tank, a second stirring device is arranged in the A/O tank, sludge outlets are arranged at the bottoms of the coagulation tank and the anaerobic reaction tank, sludge outlet pipes are connected to the sludge outlets, and the sludge outlet pipes are connected with the sludge tank;
the disinfection treatment unit comprises a disinfection tank, and the disinfection tank is connected with a discharge water tank.
2. The pollutant treating system for dairy cattle raising according to claim 1, wherein each settling pond is provided with a filter screen, and the filter screens are arranged in a horizontal direction.
3. The pollutant treatment system for dairy cattle raising according to claim 1, wherein a liquid outlet pipe is arranged at the upper end in the sludge tank, the liquid outlet pipe is connected with an inlet of the adjusting tank, and a sludge concentration sensor is arranged above the liquid outlet pipe.
4. The pollutant treating system for dairy cattle raising according to claim 1, further comprising a secondary sedimentation tank disposed between the disinfection tank and the A/O tank, wherein one end of the secondary sedimentation tank is connected with the sludge tank through a sludge discharge pipe, and the other end of the secondary sedimentation tank is connected with the A/O tank through a return pipe.
5. The dairy cattle feeding pollutant treatment system of claim 4, further comprising a membrane treatment unit located between the disinfection tank and the secondary sedimentation tank;
the membrane treatment unit comprises an MBR membrane component, an active carbon filter, a reverse osmosis membrane component, a nanofiltration membrane treatment component and a clean water tank which are sequentially connected, wherein a water inlet of the MBR membrane component is communicated with a water outlet of the secondary sedimentation tank, and an outlet of the clean water tank is communicated with an inlet of the disinfection tank.
6. The pollutant treatment system for dairy cattle feeding according to claim 1, wherein the first stirring device comprises a first stirring motor, a first stirring shaft is connected to the first stirring motor, and a first stirring blade with a spiral structure is connected to the first stirring shaft.
7. The pollutant treating system for dairy cattle raising according to claim 1, wherein the second stirring device comprises a second stirring motor, a second stirring shaft is connected to the second stirring motor, and a second stirring blade arranged in a horizontal direction is connected to the second stirring shaft.
8. A pollutant treating system for use in raising dairy cows according to claim 1, wherein the heating means comprises an air heat source pump mounted within the conditioning tank.
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| WO2022143256A1 (en) * | 2020-12-31 | 2022-07-07 | 上海映山环保科技有限公司 | Chemical sewage treatment and reuse system |
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| CN110183052A (en) * | 2019-06-17 | 2019-08-30 | 北京中科国润环保科技有限公司 | A kind of waste waste water treatment system and method |
| CN210367363U (en) * | 2019-08-20 | 2020-04-21 | 河南澜溪环保科技有限公司 | Wastewater treatment device for dairy farm breeding |
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Application publication date: 20221014 |