CN210620535U - A/O-MBR (advanced membrane bioreactor) extended efficient denitrification system - Google Patents
A/O-MBR (advanced membrane bioreactor) extended efficient denitrification system Download PDFInfo
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- CN210620535U CN210620535U CN201921381563.4U CN201921381563U CN210620535U CN 210620535 U CN210620535 U CN 210620535U CN 201921381563 U CN201921381563 U CN 201921381563U CN 210620535 U CN210620535 U CN 210620535U
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Abstract
The utility model belongs to the technical field of high-concentration ammonia nitrogen wastewater treatment, and relates to an A/O-MBR (membrane bioreactor) extended high-efficiency denitrification system, which comprises a pretreatment unit, an A/O treatment unit and an MBR membrane treatment unit which are connected in sequence; the homogenizing pool in the pretreatment unit is provided with a water inlet and distribution pipeline which is communicated with the anoxic pool in the multistage A/O treatment unit in a matching way; the A/O treatment unit comprises a multistage A/O treatment unit and a delay A/O treatment unit connected with the multistage A/O treatment unit, and the added delay A/O unit anoxic tank does not directly distribute water and is used for treating residual total nitrogen and COD in the effluent of the multistage A/O treatment unit. The utility model discloses an increase the processing unit of journey AO and solved among the prior art terminal play water nitrate nitrogen and the insufficient problem of COD processing.
Description
Technical Field
The utility model belongs to the technical field of high concentration ammonia nitrogen waste water treatment, a AO-MBR prolongs high-efficient denitrogenation system of journey.
Background
With the development of industrial level, the water environment pollution problem becomes more serious. High-concentration ammonia nitrogen wastewater is one of the focuses in the field of wastewater treatment due to the universality of the source and the great environmental hazard. In recent years, the requirement for total nitrogen in wastewater treatment is further improved, and a new challenge is provided for a high-concentration ammonia nitrogen wastewater treatment technology.
The biochemical denitrification method has the advantages of economy, high efficiency, easy operation and the like, is a commonly adopted wastewater denitrification method at present, and generally can meet the requirement of effluent total nitrogen only by adopting an extremely high reflux ratio when the total nitrogen content of wastewater is higher. The high reflux ratio means that more dissolved oxygen can enter the denitrification tank, impact is caused to denitrifying strains, the denitrification effect is influenced, meanwhile, the high reflux ratio also causes higher investment cost and operation cost, and the prior art adopts a multi-stage and multi-section A/O denitrification mode, so that the limitation of the reflux ratio on the denitrification efficiency is removed, but the problems of low treatment efficiency of total nitrogen and COD (chemical oxygen demand) introduced by the last-stage A/O water inflow still exist.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model aims at providing a high-efficient denitrogenation system of AO-MBR extension, terminal total nitrogen and COD can obtain sufficient processing, realize energy saving and consumption reduction and biochemical system's high-efficient steady operation.
In order to achieve the above purpose, the utility model provides a following technical scheme: an A/O-MBR (membrane bioreactor) extended efficient denitrification system comprises a pretreatment unit, an A/O treatment unit and an MBR membrane treatment unit which are sequentially connected; the pretreatment unit comprises a homogenizing tank; the A/O processing unit comprises a multi-stage and multi-section A/O processing unit and a delay A/O processing unit connected with the multi-stage and multi-section A/O processing unit; the MBR membrane treatment unit comprises a membrane treatment reactor which is matched and connected with the A/O treatment unit, and a sludge return pipeline is also arranged between the membrane treatment reactor and the A/O treatment unit;
the multistage multi-section A/O treatment unit comprises a plurality of groups of anoxic tanks and aerobic tanks which are sequentially connected, wherein one end close to the homogenizing tank is provided with the anoxic tank, and the tail end far away from the homogenizing tank is provided with the aerobic tank;
the extended-range A/O treatment unit comprises an extended-range anoxic tank connected with a tail end aerobic tank of the multistage A/O treatment unit, which is far away from the pretreatment unit, and one end of the extended-range anoxic tank, which is far away from the multistage A/O treatment unit, is connected with the extended-range aerobic tank;
the homogenizing tank is provided with a water inlet and distribution pipeline which is communicated with an anoxic tank in the multistage A/O processing unit in a matching way;
and a nitrifying liquid cooling system is communicated with the aerobic tank communicated with the extended-range anoxic tank, and a cooling reflux pipeline is communicated with the nitrifying liquid cooling system and communicated to the anoxic tank close to one end of the homogenizing tank.
Optionally, the communication modes between the adjacent aerobic tanks and the anoxic tank, between the extended-range aerobic tank and the extended-range anoxic tank, and between the aerobic tanks and the extended-range anoxic tank are communicated in a pipeline or overflow or bottom hole opening mode, and degassing facilities are arranged at the communication positions.
Optionally, the degassing facility is a deflector or degassing well.
Optionally, all be provided with the PH monitor probe that is arranged in the control aerobic tank pH valve in the aerobic tank and the aerobic tank of extension for thereby control dissolved oxygen's DO probe, prevent the excessive physics defoaming facility in pond of foam and be used for controlling the tubular microporous aerator of aeration rate, this tubular microporous aerator intercommunication aeration pipe, this aeration pipe keeps away from one of aerobic tank and has connect the air-blower.
Optionally, a subsurface flow type stirrer is arranged in the homogenizing tank, the anoxic tank and the extended-range anoxic tank.
Optionally, a sludge discharge pump is communicated with the aerobic tank communicated with the extended anoxic tank and used for discharging excess sludge.
Optionally, a COD probe is arranged in the homogenizing tank, an ammonia nitrogen probe and a nitrate nitrogen probe are arranged in the anoxic tank and the delayed anoxic tank, and the COD probe, the ammonia nitrogen probe and the nitrate nitrogen probe are used for monitoring so as to control the wastewater distribution ratio and the carbon source adding amount.
Optionally, the nitrifying liquid cooling system comprises a plate heat exchanger, the plate heat exchanger is connected with a cooling tower, and a cold medium water pump is arranged on a branch of the cooling tower and the plate heat exchanger.
Optionally, the MBR membrane treatment unit is respectively communicated with the extended aerobic tank and the aerobic tank communicated with the extended anoxic tank.
Optionally, a homogenizing lift pump is further disposed at one end of the water inlet and distribution pipeline close to the homogenizing tank.
The beneficial effects of the utility model reside in that:
1. the utility model discloses a AO-MBR prolongs high-efficient denitrogenation system of journey, AO the processing unit has add behind multistage AO the processing unit of multistage AO, handles the remaining total nitrogen of multistage AO the processing unit play water and COD, and the continuation oxygen deficiency pond in the extension AO unit of addding does not have direct water distribution, has solved the insufficient problem of terminal play water nitrate nitrogen and COD treatment among the prior art through increasing extension AO the processing unit.
2. The utility model discloses a high-efficient denitrogenation system of AO-MBR extension, the MBR membrane processing unit that sets up behind the AO processing unit helps improving biochemical system's sludge concentration, has prolonged the sludge age.
3. The utility model discloses a AO-MBR prolongs high-efficient denitrogenation system of journey, through the improvement to multistage AO the processing unit, has further improved biochemical system's operating stability, has realized energy saving and consumption reduction.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and/or combinations particularly pointed out in the appended claims.
Drawings
For the purposes of promoting a better understanding of the objects, features and advantages of the invention, reference will now be made to the following detailed description taken in conjunction with the accompanying drawings in which:
FIG. 1 is a schematic view of the A/O-MBR extended high-efficiency denitrification system.
Reference numerals: the device comprises a homogenizing tank 1, a water inlet and distribution pipeline 2, a first anoxic tank 3, a first aerobic tank 4, a second anoxic tank 5, a second aerobic tank 6, a third anoxic tank 7, a third aerobic tank 8, a fourth anoxic tank 9, a fourth aerobic tank 10, a nitrification liquid cooling system 11, a range-extending anoxic tank 12, a range-extending aerobic tank 13, a membrane treatment reactor 14, a cooling backflow pipeline 15, a sludge discharge pump 16, a physical defoaming facility 17, a sludge backflow pipeline 18, a submerged flow type stirrer 19, a tubular microporous aerator 20, an air blower 21, an aeration pipe 22, a plate type heat exchanger 23, a cold medium water pump 24, a cooling tower 25 and a homogenizing lift pump 26.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. The present invention can also be implemented or applied through other different specific embodiments, and various details in the present specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention, and the features in the following embodiments and examples may be combined with each other without conflict.
Wherein the showings are for the purpose of illustrating the invention only and not for the purpose of limiting the same, and in which there is shown by way of illustration only and not in any way limiting the scope of the invention; for a better understanding of the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", "front", "back", etc., indicating directions or positional relationships based on the directions or positional relationships shown in the drawings, it is only for convenience of description and simplification of description, but it is not intended to indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore, the terms describing the positional relationships in the drawings are only used for illustrative purposes and are not to be construed as limiting the present invention, and those skilled in the art can understand the specific meanings of the terms according to specific situations.
Referring to fig. 1, an a/O-MBR extended denitrification system includes a pre-treatment unit, an a/O treatment unit and an MBR membrane treatment unit connected in sequence; the pretreatment unit comprises a homogenizing tank 1; the A/O processing unit comprises a multi-stage and multi-section A/O processing unit and a delay A/O processing unit connected with the multi-stage and multi-section A/O processing unit; the MBR membrane treatment unit comprises a membrane treatment reactor 14 which is matched and connected with the A/O treatment unit, and a sludge return pipeline 18 is arranged between the membrane treatment reactor 14 and the A/O treatment unit; the communication modes between the adjacent aerobic tanks and the anoxic tank, between the extended-range aerobic tank 13 and the extended-range anoxic tank 12 and between the aerobic tanks and the extended-range anoxic tank 12 are all communicated in a pipeline or overflow or bottom hole opening mode, and the communication positions are all provided with degassing facilities which are flow guide plates or degassing wells, so that the influence of dissolved oxygen on the effect of the anoxic tank is reduced; the homogenizing tank 1, the anoxic tank and the extended-range anoxic tank 12 are all internally provided with a submerged flow type stirrer 19; the aerobic tank communicated with the extended anoxic tank 12 is communicated with a sludge discharge pump 16 for discharging excess sludge, and the sludge discharge pump is communicated to a sludge treatment facility for treatment.
In this embodiment, the multistage a/O treatment unit includes a first anoxic tank 3, a first aerobic tank 4, a second anoxic tank 5, a second aerobic tank 6, a third anoxic tank 7, a third aerobic tank 8, a fourth anoxic tank 9, and a fourth aerobic tank 10, which are connected in sequence, the first anoxic tank 3 is disposed at one end close to the homogenizing tank 1, and the fourth aerobic tank 10 is disposed at the end far from the homogenizing tank 1; the extended-range A/O treatment unit comprises an extended-range anoxic tank 12 connected with a fourth aerobic tank 10 at the tail end of the multistage A/O treatment unit, which is far away from the pretreatment unit, and one end of the extended-range anoxic tank 12, which is far away from the multistage A/O treatment unit, is connected with an extended-range aerobic tank 13; the homogenizing tank 1 is provided with a water inlet and distribution pipeline 2, one end of the water inlet and distribution pipeline 2, which is close to the homogenizing tank 1, is also provided with a homogenizing lift pump 26 for pumping wastewater in the homogenizing tank 1, and the water inlet and distribution pipeline 2 is matched and communicated with a first anoxic tank 3, a second anoxic tank 5, a third anoxic tank 7 and a fourth anoxic tank 9 in the multistage A/O processing unit; a nitrifying liquid cooling system 11 is communicated with the fourth aerobic tank 10 communicated with the extended-range anoxic tank 12, the nitrifying liquid cooling system 11 is communicated with a cooling return pipeline 15, and the cooling return pipeline 15 is communicated to the first anoxic tank 3 close to one end of the homogenizing tank 1; the nitrifying liquid cooling system 11 comprises a plate heat exchanger 23, the plate heat exchanger 23 is connected with a cooling tower 25, and a cold medium water pump 24 is arranged on a branch of the cooling tower 25 and the plate heat exchanger 23.
In this embodiment, each of the aerobic tanks and the extended reach aerobic tank 13 is provided with a PH monitoring probe for monitoring PH value in the aerobic tank, a DO probe for monitoring and controlling dissolved oxygen, a physical defoaming device 17 for preventing foam from overflowing the tank, and a tubular microporous aerator 20 for aeration, wherein the tubular microporous aerator 20 is communicated with an aeration pipe 22, one end of the aeration pipe 22 far away from the aerobic tank is connected with an air blower 21, and air passes through the air blower 21 and the aeration pipe 22 and finally enters each of the aerobic tanks and the extended reach aerobic tank 13 through the tubular microporous aerator 20.
In this embodiment, a DO monitoring probe is added to each aerobic tank, and monitoring data facilitates control of the motor frequency of the blower 21, thereby controlling the aeration rate, aiming at avoiding excessive oxygen supply or insufficient oxygen supply, and achieving energy saving and consumption reduction.
In the embodiment, the MBR membrane treatment unit is respectively communicated with the extended-range aerobic tank 13 and the fourth aerobic tank 10, so as to realize the flexible operation of the system.
In this embodiment, be provided with the COD probe in the homogeneity pond, all be provided with ammonia nitrogen probe and nitrate nitrogen probe in every oxygen deficiency pond and the delay oxygen deficiency pond, thereby COD probe, ammonia nitrogen probe and nitrate nitrogen probe are used for the control waste water distribution ratio and carbon source volume of throwing.
In this embodiment, the homogenizing tank 1, each anoxic tank and each aerobic tank, the extended-range anoxic tank 12 and the extended-range aerobic tank 13 are all provided with level meters, so as to monitor the liquid level of each tank and ensure the stable operation of the biochemical system.
When the utility model is put into use, the leachate in the refuse landfill firstly enters the homogenizing tank 1 to mix the water quality, and then the wastewater enters the first anoxic tank 3, the second anoxic tank 5, the third anoxic tank 7 and the fourth anoxic tank 9 in the multistage A/O treatment unit through the inlet water distribution pipeline 2 according to the distribution proportion of 0-0.8Q (Q is the inlet water flow) by the homogenizing lift pump 26; the reacted mixture in the anoxic tank flows to a matched aerobic tank; a part of the internal nitrifying liquid cooling system 11 of the fourth aerobic tank 10 returns the cooled nitrifying liquid to the anoxic tank; and the other part of nitrified liquid flows out of the multistage multi-section A/O treatment unit, enters a delay anoxic tank 12 of the delay A/O treatment unit, flows through a delay aerobic tank 13 and then enters a membrane treatment reactor 14, concentrated liquid separated from the membrane treatment reactor 14 flows back to a first anoxic tank 3 of the multistage multi-section A/O treatment unit through a sludge return pipeline 18, and the sludge return ratio is 1-20 times.
Wherein, a COD probe is put into the homogenizing tank 1, an ammonia nitrogen monitoring probe and a nitrate nitrogen monitoring probe are put into each anoxic tank, and the distribution proportion of inlet water and the adding amount of a carbon source are controlled according to monitoring data, so that the optimal proportion of inlet water and the minimum adding amount of the carbon source are realized; a PH monitoring probe is put into each aerobic tank, and the adding amount of acid-base agents is controlled, so that the alkalinity of the biochemical system is kept stable.
In this embodiment, the delay anoxic tank 12 mainly functions to remove the residual nitrate nitrogen in the effluent of the multistage a/O treatment unit, and no wastewater directly enters the delay anoxic tank 12, but the ammonia nitrogen monitoring probe and the nitrate nitrogen monitoring probe are retained to adjust the carbon-nitrogen ratio; the extended-range aerobic tank 13 is used for treating COD in the effluent water in the extended-range anoxic tank 12.
The utility model provides an AO the processing unit has add the continuation AO the processing unit behind multistage AO the processing unit, handles the remaining total nitrogen and COD of multistage AO the processing unit effluent, and the continuation oxygen deficiency pond in the extension AO unit of addding does not have direct water distribution, has solved the terminal nitrate nitrogen that goes out water and the insufficient problem of COD treatment among the prior art through increasing the continuation AO the processing unit; an MBR membrane processing unit arranged behind the A/O processing unit is beneficial to improving the sludge concentration of a biochemical system and prolonging the sludge age; by improving the multistage and multistage A/O processing unit, the operation stability of the biochemical system is further improved, and energy conservation and consumption reduction are realized.
Finally, the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the scope of the claims of the present invention.
Claims (10)
1. The utility model provides a high-efficient denitrogenation system of A/O-MBR extension which characterized in that: comprises a pretreatment unit, an A/O treatment unit and an MBR membrane treatment unit which are connected in sequence; the pretreatment unit comprises a homogenizing tank; the A/O processing unit comprises a multi-stage and multi-section A/O processing unit and a delay A/O processing unit connected with the multi-stage and multi-section A/O processing unit; the MBR membrane treatment unit comprises a membrane treatment reactor which is matched and connected with the A/O treatment unit, and a sludge return pipeline is arranged between the membrane treatment reactor and the A/O treatment unit;
the multistage multi-section A/O treatment unit comprises a plurality of groups of anoxic tanks and aerobic tanks which are sequentially connected, wherein one end close to the homogenizing tank is provided with the anoxic tank, and the tail end far away from the homogenizing tank is provided with the aerobic tank;
the extended-range A/O treatment unit comprises an extended-range anoxic tank connected with a tail end aerobic tank of the multistage A/O treatment unit, which is far away from the pretreatment unit, and one end of the extended-range anoxic tank, which is far away from the multistage A/O treatment unit, is connected with the extended-range aerobic tank;
the homogenizing tank is provided with a water inlet and distribution pipeline which is communicated with an anoxic tank in the multistage A/O processing unit in a matching way;
and a nitrifying liquid cooling system is communicated with the aerobic tank communicated with the extended-range anoxic tank, and a cooling reflux pipeline is communicated with the nitrifying liquid cooling system and communicated to the anoxic tank close to one end of the homogenizing tank.
2. The A/O-MBR extended effective denitrification system of claim 1, wherein: the adjacent aerobic tanks and the anoxic tanks, the extended-range aerobic tank and the extended-range anoxic tank are communicated in a pipeline or overflow or bottom hole opening mode, and degassing facilities are arranged at the communicated positions.
3. The A/O-MBR extended effective denitrification system of claim 2, wherein: the degassing facility is a guide plate or a degassing well.
4. The A/O-MBR extended effective denitrification system of claim 1, wherein: all be provided with the PH monitor probe that is arranged in the control aerobic tank pH valve in aerobic tank and the aerobic tank of extending journey for thereby control dissolved oxygen's DO probe, prevent the excessive physics defoaming facility in pond of foam and be used for controlling the tubular microporous aerator of aeration rate, this tubular microporous aerator intercommunication aeration pipe, this aeration pipe keeps away from one end of aerobic tank and has connect the air-blower.
5. The A/O-MBR extended effective denitrification system of claim 1, wherein: and the homogenizing tank, the anoxic tank and the extended-range anoxic tank are internally provided with subsurface flow type stirrers.
6. The A/O-MBR extended effective denitrification system of claim 1, wherein: and the aerobic tank communicated with the extended anoxic tank is communicated with a sludge discharge pump for discharging residual sludge.
7. The A/O-MBR extended effective denitrification system of claim 1, wherein: be provided with COD monitor probe in the homogeneity pond, all be provided with ammonia nitrogen probe and nitrate nitrogen monitor probe in oxygen deficiency pond and the delay oxygen deficiency pond, thereby COD monitor probe, ammonia nitrogen monitor probe and nitrate nitrogen monitor probe are used for the control waste water distribution ratio and carbon source volume of throwing.
8. The A/O-MBR extended effective denitrification system of claim 1, wherein: the nitrifying liquid cooling system comprises a plate heat exchanger, the plate heat exchanger is connected with a cooling tower, and a cold medium water pump is arranged on a branch of the cooling tower and the plate heat exchanger.
9. The A/O-MBR extended effective denitrification system of claim 1, wherein: the MBR membrane treatment unit is respectively communicated with the extended aerobic tank and the aerobic tank communicated with the extended anoxic tank.
10. The A/O-MBR extended effective denitrification system of claim 1, wherein: and a homogenizing lift pump is also arranged at one end of the water inlet and distribution pipeline close to the homogenizing tank.
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| CN201921381563.4U CN210620535U (en) | 2019-08-23 | 2019-08-23 | A/O-MBR (advanced membrane bioreactor) extended efficient denitrification system |
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| CN201921381563.4U CN210620535U (en) | 2019-08-23 | 2019-08-23 | A/O-MBR (advanced membrane bioreactor) extended efficient denitrification system |
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