CN215906050U - MBR sewage treatment plant of rearmounted oxygen deficiency - Google Patents

Abstract

The utility model discloses a post-anoxic MBR sewage treatment device, which comprises an adjusting tank, an anaerobic tank, a post-anoxic tank, an aerobic tank, a clean water tank, a sludge concentration tank and an MBR membrane component, wherein a lifting pump is arranged between the adjusting tank and the anaerobic tank, the effluent of the adjusting tank enters the anaerobic tank after being lifted by the lifting pump, and then sequentially flows through the post-anoxic tank and the aerobic tank for performing biochemical treatment on sewage; a sludge reflux pump is arranged between the anaerobic tank and the aerobic tank, the sludge part of the aerobic tank is lifted to the anaerobic tank by the sludge reflux pump, and the residual sludge flows into the sludge concentration tank. The device achieves the purpose of removing pollutants in sewage through the combined operation of the postposition anoxic membrane component and the MBR membrane component, and has better nitrogen and phosphorus removal efficiency.

Description

MBR sewage treatment plant of rearmounted oxygen deficiency

Technical Field

The utility model relates to the technical field of MBR (membrane bioreactor) processes, in particular to a post-anoxic MBR sewage treatment device.

Background

With the social development, industrial wastewater and urban domestic wastewater caused by food processing, agricultural and livestock product processing and the like can cause water eutrophication if the wastewater is directly discharged. Meanwhile, for effluent water quality standards of urban sewage treatment plants, the first-level B standard is improved to the first-level A standard, and execution of stricter discharge standards of municipal sewage and industrial wastewater is an effective solution.

The membrane bioreactor technology (MBR) is widely applied in the field of sewage treatment due to the characteristics of stable quality of produced water, high automation degree and the like. However, MBR always has the problems of large aeration quantity, large reflux quantity, high operation energy consumption and the like. There are also problems in combination with other processing techniques. How to better combine with the traditional technology, it is the development trend of MBR technique to guarantee that sewage treatment effect is reliable and stable.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the problems and provides a post-anoxic MBR sewage treatment device,

in order to achieve the purpose, the utility model provides the following technical scheme: a post-anoxic MBR sewage treatment device comprises an adjusting tank, an anaerobic tank, a post-anoxic tank, an aerobic tank, a clean water tank, a sludge concentration tank and an MBR membrane module, wherein a lifting pump is arranged between the adjusting tank and the anaerobic tank, the effluent of the adjusting tank enters the anaerobic tank after being lifted by the lifting pump, then sequentially flows through the post-anoxic tank and the aerobic tank for performing biochemical treatment on sewage, the water outlet of the MBR membrane module is connected with a self-priming pump through a suction pipe, and the self-priming pump is connected with the clean water tank through a water outlet pipe; a sludge reflux pump is arranged between the anaerobic tank and the aerobic tank, the sludge part of the aerobic tank is lifted to the anaerobic tank by the sludge reflux pump, and the residual sludge flows into the sludge concentration tank.

Wherein, the MBR membrane module is arranged in the aerobic tank.

The MBR membrane module is arranged in the aerobic tank, and the sludge separated by the MBR membrane module can be completely left in the aerobic tank, so that sufficient microbial colonies, namely activated sludge, can be ensured in the aerobic tank, and the effluent quality is more stable and excellent.

The device also comprises a backwashing pump which is used for extracting clean water from the clean water tank and injecting the clean water into the MBR membrane module, wherein the backwashing pump is connected with the clean water tank through a suction pipe, and the backwashing pump is connected with a self-priming pump through a water outlet pipe.

Furthermore, a loose joint valve is arranged on a suction pipe connected with the backwashing pump, and a normally closed electromagnetic valve and a check valve are arranged on a water outlet pipe connected with the backwashing pump.

Wherein, a water outlet pipe connected with the self-priming pump is provided with a normally open electromagnetic valve.

The regulating tank of the device can balance water quality and water quantity, and can remove macromolecular organic matters and realize the hydrolysis acidification of the air passage; the device's rearmounted oxygen deficiency pond, the mud in good oxygen pond flows back to the anaerobism pond, can supply the sludge amount on the one hand, and on the other hand can be to the denitrification denitrogenation of nitrate nitrogen in the mud. The lift pump lifts the sewage in the adjusting tank and conveys the sewage into the anaerobic tank.

The device achieves the purpose of removing pollutants in sewage through the combined operation of the postposition anoxic membrane component and the MBR membrane component, and has better nitrogen and phosphorus removal efficiency.

Drawings

FIG. 1 is a schematic diagram of the present invention.

In the figure: 1. the device comprises a regulating tank, 2, an anaerobic tank, 3, an aerobic tank, 4, a rear anoxic tank, 5, a clean water tank, 6, an MBR (membrane bioreactor) membrane component, 7, a lift pump, 8, a backwashing pump, 9, a self-priming pump, 10, a loose joint valve, 11, a normally open electromagnetic valve, 12, a normally closed electromagnetic valve, 13, a check valve, 14, a sludge reflux pump, 15 and a sludge concentration tank.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It is to be understood that the described embodiments are merely exemplary of the utility model, and not restrictive of the full scope of the utility model. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

A post-anoxic MBR sewage treatment device is shown in figure 1 and comprises an adjusting tank 1, an anaerobic tank 2, a post-anoxic tank 4, an aerobic tank 3, a clean water tank 5, a sludge concentration tank 15 and an MBR membrane component 6, wherein a lift pump 7 is arranged between the adjusting tank 1 and the anaerobic tank 2, effluent of the adjusting tank 1 is lifted by the lift pump 7 and then enters the anaerobic tank 2, and then flows through the post-anoxic tank 4 and the aerobic tank 3 which are used for performing biochemical treatment on sewage in sequence.

As shown in figure 1, the delivery port of MBR membrane module 6 passes through the suction tube and connects self priming pump 9, and self priming pump 9 passes through outlet pipe connection clean water basin 5, is equipped with normally open solenoid valve 11 on the outlet pipe that self priming pump 9 is connected. The device is still including being used for extracting the clear water from clear water basin 5 to pour into the backwash pump 8 of MBR membrane module 6 into, backwash pump 8 passes through the suction tube and connects clear water basin 5, and backwash pump 8 is equipped with loose joint valve 10 on the suction tube that backwash pump 8 is connected through going out water piping connection self priming pump 9, is equipped with normally closed solenoid valve 12 and check valve 13 on the outlet pipe that backwash pump 8 is connected.

As shown in FIG. 1, a sludge reflux pump 14 is provided between the anaerobic tank 2 and the aerobic tank 3, a sludge portion of the aerobic tank 3 is lifted to the anaerobic tank by the sludge reflux pump 14, and excess sludge flows into a sludge concentration tank 15.

The MBR membrane module 6 is arranged in the aerobic tank 3, sludge separated by the MBR membrane module 6 falls back into the aerobic tank 3, the sludge concentration in the aerobic tank 3 is increased, and pollutants are thoroughly decomposed; nitrifying liquid is returned to the anaerobic tank 2 from part of sludge in the aerobic tank 3 to supplement the amount of sludge, nitrate nitrogen in the sludge is denitrified, residual sludge is discharged into a sludge concentration tank 15 through a sludge return pump 14, and the sludge after concentration and drying can be transported to be landfilled or composted.

The working principle of the device is as follows: the domestic sewage collected by the pipeline firstly passes through the existing grating to remove larger floaters and suspended matters and insoluble particles with primary particles larger than gaps of the grating, then automatically flows to the regulating tank 1 by utilizing a gravity-flow mode, and is homogenized and homogenized in the regulating tank 1, and meanwhile, macromolecular organic matters can be removed to play a role in hydrolysis and acidification; then the sewage enters the integrated sewage treatment equipment through a lifting pump 7 in the regulating tank 1, flows through the anaerobic tank 2 and the postposition anoxic tank 4 in sequence for biochemical treatment, is subjected to sludge-water separation in the aerobic tank 3 through an MBR (membrane bioreactor) membrane module 6, and the supernatant enters the clean water tank 5 through a self-priming pump 9 and is finally discharged or recycled after reaching the standard after being sterilized. Wherein, the nitrified liquid is returned to the anaerobic tank 2 from the part of sludge in the aerobic tank 3 to supplement the sludge amount and denitrify the nitrate nitrogen in the sludge, the residual sludge is discharged into a sludge concentration tank 15, and the sludge after concentration and drying can be transported to landfill or compost. The reflux quantity of the sludge is increased, and the influence of nitrate on the anaerobic environment is reduced.

Wherein, the equalizing basin: the water quantity and the water quality can be regulated and uniformly mixed to be used as an emergency pool, and a part of anaerobic reaction can be performed; a post-positioned anoxic tank: organic matters in the sewage are used as a carbon source, nitrate and nitrite which flow back to the pond sludge mixture are converted into nitrogen by denitrifying bacteria, and the denitrification of the wastewater is realized; an aerobic tank: under the aeration state, a large amount of microorganisms in the activated sludge degrade or adsorb organic pollutants containing carbon, ammonia nitrogen and phosphorus in water, so that the aim of purifying the water quality is fulfilled.

The water passes through the MBR membrane module, and the filtered solution is collected by the MBR water collecting pipe and is sent to the clean water tank. Through the efficient interception function of the membrane, all bacteria and suspended matters are intercepted in the membrane tank, so that nitrifying bacteria can be effectively intercepted, the nitrification reaction is smoothly carried out, and ammonia nitrogen is effectively removed; meanwhile, macromolecular organic matters which are difficult to degrade can be intercepted, and the retention time of the macromolecular organic matters in the reactor is prolonged, so that the macromolecular organic matters are degraded to the maximum extent. The MBR membrane module utilizes the membrane to filter the sludge-containing sewage in the biochemical reaction tank, so as to realize sludge-water separation, on one hand, the membrane intercepts the microorganisms in the reaction tank, so that the concentration of the activated sludge in the aerobic tank is greatly increased to reach a high level, and the biochemical reaction for degrading the sewage is carried out more rapidly and thoroughly; on the other hand, due to the high filtering precision of the membrane, the effluent is ensured to be clear and transparent, and high-quality produced water is obtained.

The MBR membrane module can greatly save the occupied area and has stable effluent quality; the operation management is convenient, the maintenance is simple, and the traditional aerobic activated sludge treatment process can cause the sludge swelling phenomenon when being operated under the condition of high sludge load, so that the system can not normally operate, and the effluent can not reach the standard. The MBR process is used for separating mud and water by pumping through a membrane, so that the influence of sludge expansion on MBR effluent is far smaller than that of the traditional process, and the operation and management are very convenient; the sludge is long in age, is more suitable for the growth of microorganisms with long generation time, and is beneficial to removing organic substances which are difficult to explain in the wastewater; the power consumption is low; the impact resistance is strong.

Claims (5)

1. The utility model provides a MBR sewage treatment plant of rearmounted oxygen deficiency which characterized in that: the device comprises an adjusting tank, an anaerobic tank, a postposition anoxic tank, an aerobic tank, a clean water tank, a sludge concentration tank and an MBR (membrane bioreactor) membrane component, wherein a lifting pump is arranged between the adjusting tank and the anaerobic tank, the effluent of the adjusting tank enters the anaerobic tank after being lifted by the lifting pump, then sequentially flows through the postposition anoxic tank and the aerobic tank for performing biochemical treatment on the sewage, the water outlet of the MBR membrane component is connected with a self-priming pump through a suction pipe, and the self-priming pump is connected with the clean water tank through a water outlet pipe; a sludge reflux pump is arranged between the anaerobic tank and the aerobic tank, the sludge part of the aerobic tank is lifted to the anaerobic tank by the sludge reflux pump, and the residual sludge flows into the sludge concentration tank.

2. The MBR sewage treatment unit with anoxic post-treatment according to claim 1, wherein: the device is still including being used for following the clear water pond and extracting the clear water to pour into the backwash pump of MBR membrane module into, the backwash pump passes through the suction tube and connects the clear water pond, and the backwash pump passes through outlet pipe connection self priming pump.

3. The MBR sewage treatment unit with anoxic post-treatment according to claim 2, wherein: a movable joint valve is arranged on a suction pipe connected with the backwashing pump, and a normally closed electromagnetic valve and a check valve are arranged on a water outlet pipe connected with the backwashing pump.

4. The MBR sewage treatment unit with anoxic post-treatment according to claim 1, wherein: and a water outlet pipe connected with the self-priming pump is provided with a normally open electromagnetic valve.

5. The MBR sewage treatment unit with anoxic post-treatment according to claim 1, wherein: the MBR membrane module is arranged in the aerobic tank.

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