CN210711156U

CN210711156U - Milk room effluent disposal system

Info

Publication number: CN210711156U
Application number: CN201921343030.7U
Authority: CN
Inventors: 杨鹏; 张克强
Original assignee: Agro Environmental Protection Institute Ministry of Agriculture
Current assignee: Agro Environmental Protection Institute Ministry of Agriculture
Priority date: 2019-08-19
Filing date: 2019-08-19
Publication date: 2020-06-09
Anticipated expiration: 2029-08-19

Abstract

The utility model relates to a milk room effluent disposal system, including equalizing basin, anaerobism pond, good oxygen pond, sedimentation tank, aquatic plant view pond, drainage water tank, MBR membrane cisterna and normal water pond, the anaerobism pond is connected to the equalizing basin, and good oxygen pond is connected to the anaerobism pond, and the sedimentation tank is connected to good oxygen pond, and the sedimentation tank is connected with aquatic plant view pond, and drainage tank is connected to aquatic plant view pond, and drainage tank connects the normal water pond, the MBR membrane cisterna set up alone, its one end is connected with the sedimentation tank, and the normal water pond is connected to the other end. The utility model has the advantages of being scientific and reasonable in structural design, equipment selection is under the prerequisite that satisfies the technological requirement, and the principle that the technology is advanced, safe and reliable, economic rationality and through practical application, the quality is reliable is gone on, the autonomous control instrument that adopts in this technology, for domestic and foreign high-quality brand, its measurement accuracy is accurate, stability is high, sturdy and durable and protection level are higher, and ton water consumption cost is low, ton water 1.85, low cost, economic environmental protection is applicable to and uses widely.

Description

Milk room effluent disposal system

Technical Field

The utility model belongs to the waste water treatment field relates to milk room waste water treatment technique, especially milk room effluent disposal system.

Background

The milk hall wastewater mainly comprises wastewater discharged in the process of producing milk and dairy products by dairy cows, the wastewater mainly comes from cleaning water of containers and equipment, and the main components comprise product raw materials, wherein the milk processing factory contains 0.2 percent of processed raw milk, BOD (biochemical oxygen demand) is 20-300mg/L, the pollution degree of the wastewater produced by processing cheese and cream is higher, COD (chemical oxygen demand) reaches 3000mg/L, BOD (total oxygen demand) reaches 2400mg/L, total nitrogen (N) reaches 90mg/L, total phosphorus (P) reaches 16mg/L, oil content reaches 200mg/L, and suspended matters reach 600 mg/L. The dairy product industrial wastewater has the characteristics of high pollutant concentration, easy biodegradation, high content of suspended matters and the like.

The dairy waste water mainly comes from washing water and rinsing water, the milk receiving station waste water mainly comes from washing water of equipment for conveying milk products, and the milk processing plant waste water comprises washing water of various equipment, ground rinsing water, waste water for washing and stirring butter and waste water for producing various dairy products. The current wastewater treatment method for milk products generally adopts a physicochemical method: air flotation, coagulating sedimentation, adsorption and the like, and has poor removal effect, high operation cost and inconvenient management. The treatment method at the present stage is suitable for biological treatment except proper pretreatment, and the system and the method for treating the wastewater in the milk room, which are economic, environment-friendly and low in cost, have important significance.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the shortcomings of the prior art and provide a milk room wastewater treatment system with scientific and reasonable design, simple structure, economy, environmental protection and good treatment effect.

The utility model provides a its technical problem take following technical scheme to realize:

the utility model provides a milk room effluent disposal system, includes equalizing basin, anaerobism pond, good oxygen pond, sedimentation tank, aquatic plant view pond, drainage water tank, MBR membrane cisterna and well pond, the equalizing basin connect the anaerobism pond, good oxygen pond is connected to the anaerobism pond, and the sedimentation tank is connected to good oxygen pond, and the sedimentation tank is connected with aquatic plant view pond, and drainage tank is connected to aquatic plant view pond, and drainage tank connects well pond, the MBR membrane cisterna set up alone, its one end is connected with the sedimentation tank, and well pond is connected to the other end.

And an artificial grid is arranged in the adjusting tank.

And the anaerobic tank and the aerobic tank are an A/O integrated water tank, and an air blower and a reflux pump are arranged at the outlet end of the aerobic tank.

And the sedimentation tank is a horizontal flow type sedimentation tank, and a lifting pump is arranged at the bottom end of the sedimentation tank.

And a membrane module is arranged in the MBR membrane tank, and an air blower, a reflux pump and a lift pump are arranged at the end of the MBR membrane tank.

The utility model has the advantages that:

1. the utility model discloses a be provided with artifical grid in the equalizing basin, prevent that large granule material from getting into the system to need waste water to stop 24h in the equalizing basin, make the reaction fully go on, play water yield and quality of water and have good regulatory action.

2. The utility model discloses an anaerobism pond is all-in-one with good oxygen pond, and area is little, and is easy and simple to handle, and oxidation treatment is effectual, and the AO technology has the enhanced nitrogen removal function, possesses biological dephosphorization effect, and its good oxygen pond dwell time and mud age are longer, and the BOD clearance is high.

3. The utility model discloses a advection type sedimentation tank, water flows in the cell body through evenly distributed's inlet opening by the inlet channel, be equipped with the baffle behind the inlet opening, make the rivers distribute uniformly at the wide cross section of whole pond, the export adopts the overflow weir more, can follow the wide even outflow canal of pond in the clarified water after guaranteeing to deposit, establish scum groove and baffle before the weir in order to hold back the surface of water dross, rivers slowly and flow through steadily according to the design velocity of flow, generally adopt many ponds combination, the rectangle cell body is arranged more conveniently, save the occupation of land.

4. The utility model discloses an MBR system is an easy operation, and the high processing procedure of degree of automation compares with traditional processing system, can save 50% land usable floor area, can handle the sewage that the MLSS content is high (< 10g/L), has longer silt entrapment time (not less than 60 days), to different intakes, has stable product water quality of water, and mud output is low, has reduced the expense of handling, and the energy consumption is low, washs simply, and the working costs is low.

5. The utility model has the advantages of being scientific and reasonable in structural design, equipment selection is under the prerequisite that satisfies the technological requirement, and the principle that the technology is advanced, safe and reliable, economic rationality and through practical application, the quality is reliable is gone on, the autonomous control instrument that adopts in this technology, for domestic and foreign high-quality brand, its measurement accuracy is accurate, stability is high, sturdy and durable and protection level are higher, and ton water consumption cost is low, ton water 1.85, low cost, economic environmental protection is applicable to and uses widely.

Drawings

FIG. 1 is a schematic view of a wastewater treatment system according to the present invention;

Detailed Description

The present invention will be described in further detail with reference to the following embodiments, which are illustrative, not restrictive, and the scope of the invention should not be limited thereto.

The utility model provides a milk room effluent disposal system, as shown in figure 1, includes equalizing basin 2, anaerobism pond 3, good oxygen pond 4, sedimentation tank 8, aquatic plant view pond 9, drainage tank 10, MBR membrane 12 and normal water pond 13, the equalizing basin connect the anaerobism pond, the good oxygen pond is connected to the anaerobism pond, the sedimentation tank is connected to good oxygen pond, the sedimentation tank is connected with aquatic plant view pond, the drainage tank is connected to aquatic plant view pond, the normal water pond is connected to the drainage tank, MBR membrane pond set up alone, its one end is connected with the sedimentation tank, the normal water pond is connected to the other end.

Artifical grid 1 is equipped with to the equalizing basin liam for the coarse filtration of waste water, the exit end in good oxygen pond is provided with air-blower 5 and backwash pump 6, bottom at the sedimentation tank is provided with elevator pump 7, the elevator pump is used for discharging the mud suction filtration that the sedimentation tank lower part depositd, be provided with membrane module 11 in the MBR membrane cisterna, this MBR membrane cisterna end is provided with the air-blower, backwash pump and elevator pump, waste water after the filtration of MBR membrane module promotes via the elevator pump and flows into the pond in the middle of, the water that accords with discharge standard in the pond is through output pump 14 output retrieval and utilization, the process backwash pump who does not accord with the standard returns and flows into in the MBR membrane.

A milk hall wastewater treatment method comprises the following specific process flows: taking milk hall wastewater as raw water, firstly entering a regulating reservoir, staying in the regulating reservoir for 24 hours, entering an A/O (anaerobic/aerobic) pool for biochemical treatment, removing COD (chemical oxygen demand) and ammonia nitrogen in the A/O pool, enabling the wastewater to enter a sedimentation tank after passing through the A/O pool, enabling sludge in the sedimentation tank to flow back to the anaerobic pool, enabling settled reclaimed water to enter an aquatic plant landscape pool for treatment, enabling the settled reclaimed water to enter an MBR (membrane bioreactor) pool for treatment when landscape plants cannot survive in winter, recycling the treated reclaimed water to a milking hall for cleaning, and discharging residual sludge.

The equalizing basin design dwell time is 24h, does the automatic scum board of chain formula and scrapes out milk room sewage dross automatically simultaneously on the equalizing basin, and it sets up artifical grid to intake and prevents that large granule material from getting into the system, throws suspension filler in the cell body and carries out certain hydrolysis, plays certain regulating action to water yield and quality of water simultaneously.

The utility model discloses the square water tank technical parameter of well equalizing basin is as follows:

the device type:	capping square water tank
		Quantity:	1 table
The material is as follows:	carbon steel lining rubber
		Size:	6m×2m×2.5m
remarking:	external 100mm rock wool heat preservation

A/O is an abbreviation for antioxidant/OxicThe process is a deformation process developed on the basis of the traditional plug flow aerobic biological tank, an anoxic tank is arranged at the front section of the aerobic tank, and NO is provided for the anoxic tank through the backflow of the nitration mixed liquid of the aerobic tank₃And NO₂. By biological reaction of anoxic bacteria, BOD in raw water is used as electron donor to convert NO₃And NO₂Conversion to N₂And biological denitrification is realized. Therefore, the A/O process has the advantages of degrading organic pollutants and having a certain denitrification function.

The A/O process exists in an anoxic pond and an aerobic pond with two different dominant floras. In the aerobic tank, under the condition of sufficient oxygen supply, the dominant bacteria are autotrophic bacteria, and NH is generated by the nitrification of the autotrophic bacteria₃-N(NH⁺) Oxidation to NO^-In the anoxic zone, the dominant bacteria are anoxic heterotrophic flora, the dissolved oxygen in the anoxic tank must be controlled to be lower than 0.2mg/L, and NO is₃And NO₂As an oxygen supply for the growth of heterotrophic bacteria, whereby NO is converted by denitrification of the heterotrophic bacteria^-Reducing to molecular nitrogen (N). Therefore, in the A/O process, the aerobic section not only degrades the organic pollutants in the water, but also is NH₃The process of N-nitrification, the growth generation of nitrifying bacteria is relatively long.

The A/O process has the function of enhanced denitrification, but does not have the biological phosphorus removal effect, the retention time of an aerobic tank and the sludge age are longer, and the BOD removal rate is high; however, the denitrification process requires a sufficient carbon source (BOD/TN >3-5) and, if not, a supplemental carbon source.

The utility model discloses the used AO integration water tank of AO technology, concrete technological parameter is as follows:

the sedimentation tank is an important component of the activated sludge process, and the mixed liquor of the biological tank is separated from the sludge in the secondary sedimentation tank through the sedimentation function. Therefore, the operation effect of the secondary sedimentation tank is good and bad, the quality of the effluent water is directly related, most of the precipitated sludge needs to flow back into the biological tank to participate in biological reaction, and the amount of the precipitated sludge is large. The more of the practical engineering uses is the vertical flow sedimentation tank of horizontal flow sedimentation tank, radial flow sedimentation tank, and the utility model discloses the people introduces and compares the two respectively in the design.

(1) Horizontal flow type sedimentation tank

The advection type sedimentation tank consists of a water inlet, a water flow part, a water outlet and a sludge hopper. The plane of the pool body is rectangular, the inlet and the outlet are respectively arranged at two ends of the pool body, the inlet is generally a submerged water inlet, water flows into the pool body from the water inlet channel through the water inlet holes which are uniformly distributed, a baffle is arranged behind the water inlet, so that water flow is uniformly distributed on the wide cross section of the whole pool, and the outlet is mostly provided with an overflow weir to ensure that settled clarified water can uniformly flow into the water outlet channel along the width of the pool. A scum groove and a baffle are arranged in front of the weir to intercept scum on the water surface.

The water flow part is the main body of the horizontal flow sedimentation tank, the width and the depth of the tank ensure that the water flow is distributed uniformly along the cross section of the tank and flows slowly and stably according to the designed flow rate. The sludge hopper is used for accumulating precipitated sludge and is arranged below the tank bottom at the front part of the tank, and the sludge discharge pipe is arranged at the bottom of the hopper for discharging sludge regularly.

The advection type sedimentation tank is usually provided with a chain belt type mud scraper, is limited by equipment, has smaller single-tank capacity, generally adopts multi-tank combination, but has more convenient arrangement of rectangular tank bodies and saves occupied land.

(2) Radial flow sedimentation tank

The plane of the radial flow sedimentation tank body is circular. According to the water inlet and outlet directions of the sedimentation tank, the radial sedimentation tank can be divided into a central water inlet peripheral water outlet type and a peripheral water inlet peripheral water outlet type.

1) Radial flow sedimentation tank with central water inlet

The sewage of the central water inlet type sedimentation tank is introduced into the tank through a central pipe, water is uniformly distributed from the lower part of the central cylinder to the periphery, the effluent is arranged at the periphery of the tank, and a triangular weir or a submerged overflow hole is usually adopted for the effluent weir to collect supernatant and then discharge. After sludge is precipitated, the sludge is collected by a mud scraper or a mud scraping and sucking machine and then is discharged out of the sedimentation tank through a sludge pipeline. The central water inlet sedimentation tank has uniform water distribution and water outlet, has stronger adaptability to water quantity change, can set the scale of the tank body according to the water quantity requirement, can maximally reach 60m, and has simpler sludge scraping (absorbing) machine equipment and low cost. The surface load of the sedimentation tank is equivalent to that of a horizontal flow sedimentation tank, but the tank body is circular, so the occupied area is larger. More applications are used in sewage treatment plants with less restriction of the land area.

2) Peripheral water inlet radial flow sedimentation tank

The periphery water inlet radial flow type sedimentation tank is provided with a water inlet groove along the tank wall, the lower part of the groove is provided with a water inlet downcomer, and the water inlet downcomer enters the tank from the lower part of the tank. The effluent collecting tank is generally arranged on the inner side of the water inlet tank, and is used for collecting supernatant through a triangular weir or a submerged overflow hole, water flow is circulated in the tank body, the supernatant is discharged from the upper part, and sludge is scraped to a sludge hopper at the center of the tank through a sludge scraping (sucking) machine at the bottom and then is discharged by gravity.

Compared with a central water inlet radial flow sedimentation tank, the surface load of the peripheral inlet and outlet sedimentation tank is high, the occupied area is small, and the civil engineering cost is saved. The peripheral inlet and outlet sedimentation tank is generally a central driving mud scraping (sucking) machine, and when the water inflow changes greatly, the phenomena of uneven water distribution and short flow are easy to occur, and the water quality of outlet water is influenced.

(3) Vertical flow sedimentation tank

The vertical sedimentation tank is also called as a vertical sedimentation tank and is a sedimentation tank in which wastewater in the tank flows vertically. The plane figure of the pool body is round or square, water enters the pool from top to bottom through a water inlet pipe arranged in the center of the pool (the flow velocity in the pipe is less than 30mm/s), an umbrella-shaped baffle is arranged under the pipe to ensure that the wastewater slowly rises along the whole water passing section after being uniformly distributed in the pool (for domestic sewage, the flow velocity is generally 0.5-0.7mm/s, the settling time is 1-1.5h), suspended matters settle and enter a conical sludge settling hopper at the bottom of the pool, and clarified water flows out from the periphery of the pool along a peripheral overflow weir. A baffle plate and a scum groove are arranged in front of the weir to intercept scum and ensure the quality of effluent. One side of the pool is provided with a mud pipe (the diameter is more than 200mm) close to the pool wall, and mud is discharged periodically by hydrostatic pressure. The vertical sedimentation tank has the advantages of small occupied area, easy sludge discharge, large depth, difficult construction and high manufacturing cost. Is usually used for treating water with a volume of less than 20000m³D sewage treatment plant。

In summary, the horizontal flow sedimentation tank is used in the project, and the specific technical parameters are as follows:

the utility model discloses an aquatic plant view pond includes the aquatic plant culture tank, is provided with hot house on the aquatic plant culture tank, and aquatic plant culture tank embeds culture medium support, elevator pump and liquid level switch, the outside drainage water tank of aquatic plant culture tank, hot house.

A Membrane Bioreactor (MBR) is a novel sewage treatment technology combining an efficient membrane separation technology and an activated sludge process, is a modern and efficient water treatment system, can meet the increasing demand of municipal sewage treatment capacity, and greatly improves the water quality after sewage treatment. The activated sludge process is combined with an integrated immersed membrane separation system, and can be used for treating municipal or industrial wastewater with high organic content. Although the technical application of the aerobic MBR process dates back to the 70's of the 20 th century, its large-scale commercial application in the field of sewage treatment was also beginning during the last 10 years.

MBRs organically combine biochemical treatment and membrane retention processes. The membrane entrapment greatly enhances the biochemical process, which also makes the membrane entrapment more than a simple filtration, with complex organic and inorganic phenomena. The solid-liquid separation process by using the membrane component replaces the traditional sedimentation process, and can effectively remove solid suspended particles and organic particles to prepare sterile water. Compared with the traditional process, the MBR can enable the activated sludge to have a higher MLSS value, prolong the retention time of the activated sludge in the reactor, and improve the nitrogen removal rate and the degradation of organic matters. The process can be widely applied to the municipal and industrial sewage treatment fields, including water resource recycling, community development, park scenic spot water resource recycling and the like.

The utility model discloses the MBR system of well adoption Tianjin sea party is an easy operation, and the high processing procedure of degree of automation has following advantage:

⑴, compared with the traditional treatment system, the land use area can be saved by 50%;

⑵ can treat sewage with high MLSS content (less than 10g/L), and has long sludge retention time (no less than 60 days);

⑶ has stable water quality for different water intakes;

⑷ the yield of sludge is low, and the treatment cost is reduced;

⑸, low energy consumption, simple cleaning and low operating cost;

the FP series membrane component provided by Tianjin Haipard adopts PVDF as membrane material to prepare the hollow fiber micro-filtration membrane, which has good chemical stability and is very suitable for MBR system. The MBR system uses a hollow fiber membrane to carry out solid-liquid separation, and the FP series immersion hollow fiber membrane provided by Tianjin Haidett is a membrane component specially developed and developed for matching with a Membrane Bioreactor (MBR). The filter has high filtering efficiency, and can effectively remove bacteria, suspended particles and impurities, thereby obtaining high-quality filtered water. In addition, because the membrane module has large filtering area, the installation of the membrane occupies small volume, and the volume and the occupied area of the reactor are reduced.

The specification and performance technical parameters of the FP series membrane component of the utility model are as follows:

the utility model discloses an equipment selection type is under the prerequisite that satisfies the technological requirement, and the principle of advanced, safe and reliable, the economic rationality of technology and through practical application, the quality is reliable is gone on.

The automatic control instrument adopted in the project is a high-quality brand at home and abroad, has accurate measurement precision, high stability, firmness, durability, higher protection level and low cost of water consumption per ton, and has the following specific consumption:

the system is designed to process a scale of from 1 to 3 square meters per ton of water, for example, 25 to 75 square meters of water is required to process 25 tons of water.

Although the embodiments of the present invention and the accompanying drawings are disclosed for illustrative purposes, those skilled in the art will appreciate that: various substitutions, changes and modifications are possible without departing from the spirit and scope of the present invention and the appended claims, and therefore, the scope of the present invention is not limited to the disclosure of the embodiments and the accompanying drawings.

Claims

1. The utility model provides a milk room effluent disposal system which characterized in that: including equalizing basin, anaerobism pond, good oxygen pond, sedimentation tank, aquatic plant view pond, drainage water tank, MBR membrane cisterna and well pond, the equalizing basin connect the anaerobism pond, good oxygen pond is connected to the anaerobism pond, and the sedimentation tank is connected to good oxygen pond, and the sedimentation tank is connected with aquatic plant view pond, and drainage box is connected to aquatic plant view pond, and drainage box connects well pond, the MBR membrane cisterna set up alone, its one end is connected with the sedimentation tank, and well pond is connected to the other end.

2. The milk room wastewater treatment system of claim 1, wherein: an artificial grid is arranged in the adjusting tank.

3. The milk room wastewater treatment system of claim 1, wherein: the anaerobic tank and the aerobic tank are an A/O integrated water tank, and an air blower and a reflux pump are arranged at the outlet end of the aerobic tank.

4. The milk room wastewater treatment system of claim 1, wherein: the sedimentation tank is a horizontal flow sedimentation tank, and a lift pump is arranged at the bottom end of the sedimentation tank.

5. The milk room wastewater treatment system of claim 1, wherein: and a membrane module is arranged in the MBR membrane tank, and an air blower, a reflux pump and a lift pump are arranged at the end of the MBR membrane tank.