Livestock and poultry breeding wastewater concentration and reduction device

Abstract

The utility model discloses a livestock and poultry breeding wastewater concentration reduction device which comprises a solid-liquid separation system and a membrane concentration system, the solid-liquid separation system comprises a water storage tank, an inclined plate filter tank, a middle water tank, a sand filter tank, a buffer barrel, a sludge concentration tank and a filter press, and a lifting pump is connected with a water diversion tank to pump wastewater in the water storage tank into the inclined plate filter tank; primary filtrate of the inclined plate filter tank flows into a middle water tank, a water delivery pump pumps water in the middle water tank into a sand filter tank, and waste liquid produced by the sand filter tank enters a buffer barrel to be collected; the membrane concentration system comprises an ultrafiltration equipment unit and a reverse osmosis equipment unit, and waste liquid of the solid-liquid separation system enters the membrane concentration system to be concentrated. The utility model solves the problems of large yield of livestock and poultry breeding wastewater and lower content of effective nutrient substances, and pretreats the wastewater before membrane concentration, so that the inlet water quality of the membrane concentration system meets the requirement, and the membrane concentration burden is reduced.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of livestock and poultry breeding wastewater treatment, and relates to a livestock and poultry breeding wastewater concentration and reduction device. BACKGROUND

[0002] Livestock and poultry breeding wastewater refers to excrement and waste produced in the process of livestock and poultry breeding, which is mainly composed of feces, urine, food residues, microorganisms, residual veterinary drugs and flushing wastewater. When the water is used to clean the feces in the form of water flushing or water soaking, the solid feces will enter the liquid sewage, increasing the treatment load of the sewage. After the solid-liquid separation of the livestock and poultry breeding wastewater, the liquid part and the solid part are treated respectively. The conventional solid-liquid separation technology can only remove the large-particle solid, and a large amount of soluble nutrients, including vitamins, enzymes, amino acids, trace elements (Zn, Fe, Mn, etc.) and a large amount of elements (N, P, K, etc.) required for plant growth, are preserved in the liquid part, which means that the liquid part still has the value of exploitation and utilization. However, due to the characteristics of high water content and low nutrient concentration, it is difficult to be widely used in agricultural production, and a reasonable concentration method needs to be adopted to better utilize it. From the perspective of the cycle of planting and breeding, the demand of farmland and the output of livestock and poultry waste liquid are out of sync, the demand of crops for manure is seasonal, while the livestock and poultry breeding industry produces a large amount of concentrated feces without seasonality, and the waste liquid part continuously flows into the storage pool, which has high storage and transportation costs.

[0003] Membrane concentration technology is a process of enriching soluble nutrients in breeding wastewater, which can concentrate breeding wastewater nutrients to produce high-value liquid fertilizer. The permeate produced by membrane separation can be used for flushing the circle shed, greening the farm or discharging as irrigation water. At present, the most commonly used method is reverse osmosis or the combination of reverse osmosis and ultrafiltration, microfiltration. In order to maintain the stable operation of the membrane concentration system, the waste liquid is purified before concentration, so as to provide stable water for the subsequent nutrient concentration and realize the nutrient recovery of the whole system and obtain high-quality permeate. Although the membrane technology has obvious advantages, the cost of the membrane accounts for 10% to 30% of the whole system cost, and the cost is still high in actual application. During the operation, membrane pollution is inevitable, and effective pretreatment can delay the decline of membrane flux and prolong the service life of the membrane. SUMMARY

[0004] The purpose of the present application is to provide a livestock and poultry breeding wastewater concentration and reduction device to solve the problems of large output of livestock and poultry breeding wastewater and low content of effective nutrients. The wastewater is pretreated before membrane concentration, so that the water quality of the membrane concentration system meets the requirements, the burden of membrane concentration is reduced, and the membrane pollution is reduced.

[0005] In order to achieve the above object, the present application provides the technical scheme as follows: a livestock and poultry breeding wastewater concentration and reduction device, which comprises a solid-liquid separation system and a membrane concentration system, waste liquid of the solid-liquid separation system enters the membrane concentration system for concentration, the solid-liquid separation system comprises a water storage pool, an inclined plate filter pool, an intermediate water pool, a sand filter tank, a buffer barrel and a sludge concentration pool, a filter press, a booster pump connects a water diversion tank to pump waste water in the water storage pool into the inclined plate filter pool, primary filtrate of the inclined plate filter pool flows into the intermediate water pool, a water delivery pump pumps intermediate water in the intermediate water pool into the sand filter tank, a water outlet of the sand filter tank is connected with a water outlet pipe, a sewage outlet of the sand filter tank is connected with a sewage pipe and a backwash inlet pipe, the water outlet pipe is connected with the buffer barrel for collecting the waste liquid, a water inlet of the sand filter tank is connected with a backwash water outlet pipe, sludge in the inclined plate filter pool is discharged into the sludge concentration pool, the filter press performs filter pressing on sludge in the sludge concentration pool, and filter pressed water is returned to the water storage pool.

[0006] The membrane concentration system comprises an ultrafiltration equipment set, the ultrafiltration equipment set comprises a feed pump and an ultrafiltration membrane set, the waste liquid is pumped into the ultrafiltration membrane set through the feed pump, and ultrafiltration liquid generated by the ultrafiltration membrane set is collected into an ultrafiltration water production barrel.

[0007] The membrane concentration system further comprises a low-pressure pump, a security filter and a reverse osmosis equipment set, the reverse osmosis equipment set comprises a high-pressure pump and a reverse osmosis membrane set, the security filter is connected between the ultrafiltration equipment set and the reverse osmosis equipment set, the ultrafiltration liquid of the ultrafiltration membrane set is pumped into the reverse osmosis membrane set through the low-pressure pump and the security filter and then the high-pressure pump, and the permeate and the concentrated liquid of the reverse osmosis membrane set are collected respectively.

[0008] An ultraviolet sterilizer is connected to a permeate outlet pipe of the reverse osmosis membrane set.

[0009] The reverse osmosis equipment set is further provided with an inlet liquid pressure indicating table, a concentrated liquid flow indicator, a concentrated liquid pressure indicating table, a permeate flow indicator and a permeate pressure indicating table.

[0010] The permeate is discharged from an outlet of the ultraviolet sterilizer, and part of the sterilized permeate is collected into a permeate storage barrel for backwashing of the reverse osmosis equipment set.

[0011] The permeate storage barrel is provided with a backwashing water outlet pipe, the backwashing water outlet pipe is connected to a backwashing pressure pump, the backwashing pressure pump is connected to a water inlet of the security filter through a backwashing pipe, a backwashing discharge pipe is connected to a concentrated liquid outlet pipe of the reverse osmosis membrane set, and a backwashing pressure indicating table is arranged on the backwashing pipe.

[0012] A concentrated liquid storage barrel is connected to an outlet pipe of the concentrated liquid, part of the concentrated liquid is collected into the concentrated liquid storage barrel, and another part of the concentrated liquid is returned to the reverse osmosis equipment set.

[0013] The backflow pipe is connected with the inlet pipe of the high-pressure pump, and a backflow water flow indicator is arranged on the backflow pipe.

[0014] The permeate liquid storage barrel is further provided with a backwashing outlet pipe connected to a backwashing pressure pump, the backwashing pressure pump is connected to the concentrated liquid outlet pipe through a backwashing pipe, and a backwashing discharge pipe is connected to the concentrated liquid inlet pipe of the reverse osmosis membrane unit, and a backwashing pressure indicator is arranged on the backwashing pipe.

[0015] Compared with the prior art, the present application has the following beneficial effects:

[0016] The present application adopts solid-liquid separation-ultrafiltration membrane-reverse osmosis membrane technology to highly concentrate livestock breeding wastewater, and the water quality of the concentrated water can meet the irrigation water standard and be directly discharged; the concentrated water part can achieve more than 3 times of concentration effect on organic matter, ammonia nitrogen and phosphate nutrients, and the volume of the livestock breeding wastewater is reduced to less than 1 / 3 of the original, which can be used as liquid fertilizer for popularization.

[0017] The livestock breeding wastewater concentration and reduction device of the present application has the following advantages: the original livestock breeding wastewater in the water storage pool is rapidly and preliminarily filtered through the inclined plate filter tank, the water quality is stabilized in the intermediate pool, and the sedimentation efficiency is improved. The water diversion tank balances the pressure fluctuation in the conveying process of the lifting pump, plays a buffering role, filters out large particles, and protects the lifting pump. The sand filter tank can deeply filter out suspended matter and colloidal matter, effectively pre-purifies the water body entering the membrane concentration system, and reduces the burden of the subsequent membrane concentration process. The sand filter tank can be dynamically backwashed to ensure the sand filtration effect. The sludge in the sludge concentration tank is dewatered by the filter press, the filter press water is returned to the water storage pool, the concentrated sludge is transported out, and the solid-liquid separation of the livestock breeding wastewater is maximized. The solid-liquid separation system provides water with required water quality for the membrane concentration system.

[0018] The livestock breeding wastewater concentration and reduction device of the present application has the following advantages: the ultrafiltration equipment unit can use ultrafiltration water to complete backwashing, the reverse osmosis membrane unit can use reverse osmosis permeate liquid to complete forward washing and backwashing, which can clean the membrane components of the membrane concentration system, remove impurities and restore the membrane flux, and effectively recycle the water in the system to save water resources. The concentrated liquid part of the reverse osmosis membrane unit is returned to the reverse osmosis membrane unit to increase the concentrated water flow rate on the membrane surface and meet the minimum concentration requirement of the reverse osmosis membrane concentrated water. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a structure schematic view of the solid-liquid separation system in the livestock breeding wastewater concentration and reduction device of the present embodiment.

[0020] Figure 2 It is a structure schematic view of the membrane concentration system in the livestock breeding wastewater concentration and reduction device of the present embodiment. It is a structure schematic view of the membrane concentration system in the livestock breeding wastewater concentration and reduction device of the present embodiment.

[0021] Reference numerals: 101. wastewater, 102. water storage tank, 103. water introduction tank, 104. lifting pump, 105. inclined plate filter tank, 106. intermediate water tank, 107. water delivery pump, 108. sand filter tank, 109. buffer tank, 110. sludge discharge valve, 111. sludge concentration tank, 112. filter press pump, 113. filter press, 114. filter press discharge pipe, 115. sand filter tank water inlet, 116. backwash water outlet pipe, 117. sand filter tank water outlet, 118. water outlet pipe, 119. sewage outlet, 120. sewage pipe, 121. backwash water inlet pipe, 122. filter press feed pipe, 123. liquid level meter, 124. sludge outlet, 201. feed pump, 202. ultrafiltration membrane unit, 203. waste liquid inlet, 204. ultrafiltration liquid outlet, 205. ultrafiltration water bucket, 206. ultrafiltration backwash inlet, 207. ultrafiltration backwash outlet, 208. ultrafiltration backwash pump, 209. low-pressure pump, 210. security filter, 211. high-pressure pump, 212. reverse osmosis membrane unit, 213. permeate outlet pipe, 214. backwash pressure indicator, 215. ultraviolet sterilizer, 216. liquid inlet pressure indicator, 217. permeate pressure indicator, 218. permeate flow indicator, 219. concentrate pressure indicator, 220. concentrate flow indicator, 221. concentrate outlet pipe, 222. concentrate storage bucket, 223. backflow pipe, 224. backflow flow indicator, 225. permeate storage bucket, 226. forward wash outlet pipe, 227. forward wash pressure pump, 228. forward wash pipe, 229. forward wash discharge pipe, 230. forward wash pressure indicator, 231. backwash outlet pipe, 232. backwash pressure pump, 233. backwash pipe, 234. backwash discharge pipe. DETAILED DESCRIPTION

[0022] The utility model is further explained below in combination with examples. These examples are only used for explaining the utility model and not for limiting the range of the utility model. Any non-essential change and replacement made by the person skilled in the art on the basis of the utility model belongs to the range claimed by the utility model.

[0023] The pollution concentration of livestock and poultry breeding wastewater varies with different manure removal methods, but in general, high suspended solids, high ammonia nitrogen and high COD (Chemical Oxygen Demand) are the most notable features, and it has the characteristics of high moisture content, low solid content and certain adhesion. The embodiment provides a livestock and poultry breeding wastewater concentration and reduction device, which comprises a solid-liquid separation system and a membrane concentration system, and the waste liquid of the solid-liquid separation system enters the membrane concentration system for concentration.

[0024] Because the membrane concentration technology requires the purification level of waste liquid to be higher than the level required by the conventional sewage treatment process, the pre-treatment of waste water before the membrane concentration is very important. Referring to Figure 1 The solid-liquid separation system of the embodiment includes a water storage tank 102, an inclined plate filter tank 105, an intermediate water tank 106, a sand filter tank 108, a buffer barrel 109, and a sludge concentration tank 111 and a filter press 113. The lifting pump 104 connects the water guide tank 103 to pump the waste water 101 in the water storage tank 102 into the inclined plate filter tank 105. The primary filtrate of the inclined plate filter tank 105 flows into the intermediate water tank 106. The water delivery pump 107 pumps the intermediate water in the intermediate water tank 106 into the sand filter tank 108. The water outlet 117 of the sand filter tank is connected to the water outlet pipe 118. The sewage outlet 119 of the sand filter tank is connected to the sewage pipe 120 and the backwashing water inlet pipe 121. The waste liquid is discharged from the water outlet pipe 118. The water outlet pipe 118 is connected to the buffer barrel 109 for collecting waste liquid. The water inlet 115 of the sand filter tank is connected to the backwashing water outlet pipe 116. The sludge in the inclined plate filter tank 105 is discharged into the sludge concentration tank 111. The filter press 113 performs filter pressing on the sludge in the sludge concentration tank 111. The filter-pressed water is returned to the water storage tank 102.

[0025] Referring to Figure 1 The original waste water 101 of livestock and poultry breeding flows into the water storage tank 102. The original waste water 101 in the water storage tank 102 is pumped into the inclined plate filter tank 105 by the lifting pump 104 and is then allowed to stand for no more than 30 minutes. The water guide tank 103 is arranged in front of the lifting pump 104 to smoothly pump and deliver the waste water and to balance the pressure fluctuation in the delivery process. The water guide tank 103 can also filter out larger particles and protect the lifting pump 104. The primary filtrate of the inclined plate filter tank 105 flows into the intermediate water tank 106. The solid-liquid preliminary separation is realized by gravity to remove part of the pollutants. The sludge valve 110 arranged at the bottom of the inclined plate filter tank 105 discharges the sludge to the sludge concentration tank 111 for recovery. The liquid level meter 123 is arranged in the intermediate water tank 106 to monitor the liquid level as needed to improve the stability and reliability of the production process. The intermediate water in the intermediate water tank 106 is pumped into the sand filter tank 108 by the water delivery pump 107. The sand filtration can deeply filter out the suspended matter and colloidal matter to effectively pre-clean the water entering the subsequent ultrafiltration equipment set and to reduce the burden of the subsequent membrane concentration process. When the sand filter tank 108 is backwashed, tap water can be pumped from the backwashing water inlet pipe 121. The backwashing water of the sand filter tank 108 is discharged from the backwashing water outlet pipe 116 and is returned to the water storage tank 102. The sludge is pumped into the filter press feed pipe 122 by the filter press pump 112, then enters the filter chamber of the filter press 113, and the filter-pressed water is returned to the water storage tank 102 from the filter press discharge pipe 114. The sludge at the filter press sludge outlet 124 is transported out.

[0026] Referring to Figure 2The membrane concentration system of the embodiment includes an ultrafiltration device unit and a reverse osmosis device unit, and a security filter 210 is arranged between the ultrafiltration device unit and the reverse osmosis device unit. The ultrafiltration device unit includes a feed pump 201 and an ultrafiltration membrane unit 202, and the waste liquid in the buffer tank 109 is pumped into the ultrafiltration membrane unit 202 by the feed pump 201. The ultrafiltration membrane unit 202 is provided with a waste liquid inlet 203, an ultrafiltration liquid outlet 204, an ultrafiltration backwash inlet 206, an ultrafiltration backwash outlet 207, an ultrafiltration backwash pump 208 and an ultrafiltration water production tank 205. The ultrafiltration membrane unit 202 can be a ceramic ultrafiltration membrane unit, and the operating pressure is 0.2 MPa. Due to the selective interception of the ultrafiltration membrane, part of the macromolecular organic matter is completely intercepted, and the suspended solids and COD in the waste liquid in the buffer tank 109 can be filtered. After the waste liquid is purified by the ultrafiltration membrane unit 202, the ultrafiltration liquid is collected from the pipeline of the ultrafiltration liquid outlet 204 to the ultrafiltration water production tank 205. When the ceramic membrane ultrafiltration is used to purify and concentrate the waste liquid, the particulate matter and colloidal matter will form pollution on the membrane surface, part of the ultrafiltration liquid is backflowed for backwashing of the ultrafiltration membrane, which saves water resources, restores the ultrafiltration membrane flux through backwashing, and improves the stability of the ultrafiltration membrane unit. The ultrafiltration backwash pump 208 is connected to the ultrafiltration backwash inlet 206 through a pipeline. During backwashing, the ultrafiltration liquid in the ultrafiltration water production tank 205 is pumped into the ultrafiltration membrane unit 202 by the ultrafiltration backwash pump 208, and the ultrafiltration backwash liquid is discharged from the ultrafiltration backwash outlet 207 and then backflows to the water storage tank 102.

[0027] Reference Figure 2 The reverse osmosis device unit of the embodiment includes a high-pressure pump 211 and a reverse osmosis membrane unit 212. The ultrafiltration liquid produced by the ultrafiltration membrane unit 202 is pumped into the reverse osmosis membrane unit 212 by the low-pressure pump 209 and the security filter 210 after being pressurized by the high-pressure pump 211, and the permeate and the concentrated liquid of the reverse osmosis membrane unit 212 are collected respectively. The security filter 210 filters out the fine suspended solids in the ultrafiltration liquid, so that the water quality entering the reverse osmosis membrane unit 212 meets the requirements, and the reverse osmosis membrane is protected from damage by particulate matter. The content of small-molecule organic matter such as dissolved microbial metabolites and humic substances in the ultrafiltration liquid is high, and most of the dissolved organic matter is nutrient substance that can be utilized by crop growth. The important target product of the waste water concentration by the reverse osmosis membrane unit 212 is the recovery and enrichment of the part of the dissolved organic matter.

[0028] Reference Figure 2In the embodiment, the permeate outlet pipe 213 of the reverse osmosis membrane unit 212 is connected with an ultraviolet sterilizer 215. In the embodiment, the ultraviolet sterilizer 215 can be a pipeline ultraviolet sterilizer. The sterilizer tank has a low-voltage high-strength ultraviolet lamp tube. The ultraviolet lamp tube is sleeved with a quartz sleeve for protection. The high transparency of the quartz sleeve ensures high transmittance of ultraviolet rays. The permeate flows into the ultraviolet sterilizer 215 from the inlet, is irradiated by the low-voltage high-strength ultraviolet lamp tube in the sterilizer tank, and is disinfected and sterilized. Since no chemical agent needs to be added, secondary pollution of the permeate can be avoided.

[0029] Reference Figure 2 In the embodiment, the reverse osmosis equipment unit is also provided with a liquid inlet pressure indicator 216, a concentrated liquid flow indicator 220, a concentrated liquid pressure indicator 219, a permeate flow indicator 218, and a permeate pressure indicator 217. By providing the liquid inlet pressure indicator 216, the permeate pressure indicator 217, and the concentrated liquid pressure indicator 219, the water pressure in the pipeline of the entire device can be monitored in real time, and the membrane concentration system can be ensured to operate normally within the design pressure range. If an abnormal pressure is encountered, it can be found in time. The provision of the permeate flow indicator 218 and the concentrated liquid flow indicator 220 can monitor the flow direction and flow rate of the system, quickly locate the abnormal pipeline, and ensure long-term stable operation of the device.

[0030] Reference Figure 2 The concentrated liquid outlet pipe 221 is connected with a concentrated liquid storage barrel 222. Part of the concentrated liquid is collected in the concentrated liquid storage barrel 222, and another part of the concentrated liquid is returned to the reverse osmosis equipment unit. The concentrated liquid outlet pipe 221 is also connected with a return pipe 223, which is connected with the inlet pipe of the high-pressure pump 211. The reverse osmosis membrane unit 212 has a maximum pressure drop and water inlet quantity limit. The return flow of the concentrated liquid needs to be within a suitable range to ensure normal operation. The return flow indicator 224 is arranged on the return pipe 223 to detect the flow direction and flow rate of the return pipe 223, so as to avoid damage to the membrane elements in the reverse osmosis membrane unit 211. The part of the return flow of the concentrated liquid is re-entered into the reverse osmosis membrane unit 212 through the high-pressure pump 211, which can improve the concentrated liquid flow rate on the membrane surface and maintain the total design recovery rate of the membrane concentration system. The part of the concentrated liquid collected in the concentrated liquid storage barrel 222 can be used for subsequent production of liquid organic fertilizer and struvite slow-release fertilizer, which has advantages in improving crop yield and replacing chemical fertilizer.

[0031] Reference Figure 2The permeate is discharged from the outlet of the ultraviolet sterilizer 215, and part of the permeate after sterilization is collected in the permeate storage barrel 225 for the forward washing of the reverse osmosis device unit, and another part of the permeate after sterilization can be directly discharged up to the standard. The permeate storage barrel 225 is provided with a forward washing outlet pipe 226 connected to a forward washing pressure pump 227, the forward washing pressure pump 227 is connected to the water inlet of the security filter 210 through a forward washing pipe 228, the concentrated liquid outlet pipe 221 of the reverse osmosis membrane unit 212 is connected with a forward washing discharge pipe 229, the forward washing pipe 228 is provided with a forward washing pressure indicating table 230, and the liquid of the forward washing discharge pipe 229 is returned to the water storage tank 102. The permeate storage barrel 225 is also provided with a backwashing outlet pipe 231 connected to a backwashing pressure pump 232, the backwashing pressure pump 232 is connected to the concentrated liquid outlet pipe 221 through a backwashing pipe 233, the inlet pipe of the reverse osmosis membrane unit 212 is connected with a backwashing discharge pipe 234, the liquid of the backwashing discharge pipe 234 is returned to the water storage tank 102, and the backwashing pipe 233 is provided with a backwashing pressure indicating table 214. By low-pressure high-flow-rate forward washing and backwashing of the reverse osmosis membrane unit 212, membrane pollution is further relieved, the membrane flux is ensured, dynamic cleaning is realized, and the service life of the reverse osmosis membrane is prolonged.

[0032] The livestock breeding wastewater concentration reduction device of the embodiment carries out sedimentation-sand filtration-ultrafiltration-reverse osmosis purification and concentration on the wastewater in sequence, pre-treats the wastewater through a solid-liquid separation system, separates the liquid and solid parts in the wastewater, removes suspended particulate matter and colloidal matter, and can provide water with a water quality meeting the requirements for the subsequent concentration system, relieve membrane pollution caused in the wastewater concentration process, ensure the stability of the equipment operation, and maximize the separation of the solid and liquid of the livestock breeding wastewater through pressure filtration. After the membrane concentration treatment, the concentrated liquid obtained has a high nutrient content per unit volume, i.e., the nutrients are enriched, can be used for configuring organic fertilizer, and the storage and transportation cost is reduced, while the permeate can be reused, realizing the resource utilization of the wastewater. The whole set of process equipment has a high degree of automation, strong pollution resistance, and can realize continuous and stable operation.

Claims

1. A livestock and poultry breeding wastewater concentration and reduction device, comprising a solid-liquid separation system and a membrane concentration system, the waste liquid of the solid-liquid separation system enters the membrane concentration system for concentration, characterized in that: The solid-liquid separation system comprises a water storage tank, a inclined plate filter tank, an intermediate water tank, a sand filter tank, a buffer barrel and a sludge concentration tank, a filter press, a lifting pump connecting a water guide tank to pump wastewater in the water storage tank into the inclined plate filter tank, the initial filtrate of the inclined plate filter tank flowing into the intermediate water tank, a water pump pumping the intermediate water in the intermediate water tank into the sand filter tank, the water outlet of the sand filter tank being connected to a water outlet pipe, the sewage outlet of the sand filter tank being connected to a sewage pipe and a backwash inlet pipe, the water outlet pipe being connected to the buffer barrel for collecting the waste liquid, the water inlet of the sand filter tank being connected to a backwash water outlet pipe, the sludge in the inclined plate filter tank being discharged into the sludge concentration tank, the filter press performing filter pressing on the sludge in the sludge concentration tank, and the filter-pressed water being returned to the water storage tank.

2. The livestock and poultry breeding wastewater concentration and reduction device according to claim 1, characterized in that: The membrane concentration system comprises an ultrafiltration equipment set, which comprises a feed pump and an ultrafiltration membrane set, the waste liquid being pumped into the ultrafiltration membrane set through the feed pump, and the ultrafiltrate produced by the ultrafiltration membrane set being collected into an ultrafiltration water tank.

3. The livestock and poultry breeding wastewater concentration and reduction device according to claim 2, characterized in that: The membrane concentration system further comprises a low-pressure pump, a security filter and a reverse osmosis equipment set, the reverse osmosis equipment set comprising a high-pressure pump and a reverse osmosis membrane set, the security filter being connected between the ultrafiltration equipment set and the reverse osmosis equipment set, the ultrafiltrate of the ultrafiltration membrane set being pumped into the reverse osmosis membrane set through the low-pressure pump and the security filter and then the high-pressure pump, and the permeate and the concentrated liquid of the reverse osmosis membrane set being collected respectively.

4. The livestock and poultry breeding wastewater concentration and reduction device according to claim 3, characterized in that: An ultraviolet sterilizer is connected to the permeate outlet pipe of the reverse osmosis membrane set.

5. The livestock and poultry breeding wastewater concentration and reduction device according to claim 4, characterized in that: The reverse osmosis equipment set is further provided with an inlet liquid pressure indicator, a concentrated liquid flow indicator, a concentrated liquid pressure indicator, a permeate flow indicator and a permeate pressure indicator.

6. The livestock and poultry breeding wastewater concentration and reduction device according to claim 5, characterized in that: The permeate is discharged from the outlet of the ultraviolet sterilizer, and part of the sterilized permeate is collected into a permeate storage tank for forward washing of the reverse osmosis equipment set.

7. The livestock and poultry breeding wastewater concentration and reduction device according to claim 6, characterized in that: The permeate storage tank is provided with a forward washing water outlet pipe, the forward washing water outlet pipe being connected to a forward washing pressure pump, the forward washing pressure pump being connected to the water inlet of the security filter through a forward washing pipe, a forward washing discharge pipe being connected to the concentrated liquid outlet pipe of the reverse osmosis membrane set, and a forward washing pressure indicator being arranged on the forward washing pipe.

8. The livestock and poultry breeding wastewater concentration and reduction device according to claim 7, characterized in that: The concentrated liquid outlet pipe is connected to a concentrated liquid storage tank, part of the concentrated liquid being collected into the concentrated liquid storage tank, and another part of the concentrated liquid being returned to the reverse osmosis equipment set.

9. The livestock and poultry breeding wastewater concentration and reduction device according to claim 8, characterized in that: A return pipe is further connected to the concentrated liquid outlet pipe, the return pipe being connected to the inlet pipe of the high-pressure pump, and a return flow indicator being arranged on the return pipe.

10. The livestock and poultry breeding wastewater concentration and reduction device according to claim 9, characterized in that: The permeate storage tank is further provided with a backwash water outlet pipe, the backwash water outlet pipe being connected to a backwash pressure pump, the backwash pressure pump being connected to the concentrated liquid outlet pipe through a backwash pipe, a backwash discharge pipe being connected to the concentrated liquid inlet pipe of the reverse osmosis membrane set, and a backwash pressure indicator being arranged on the backwash pipe.

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