CN219326649U

CN219326649U - Pool-column coupling type membrane photo-biological reaction device for sewage treatment

Info

Publication number: CN219326649U
Application number: CN202223525780.0U
Authority: CN
Inventors: 谭周亮; 李俊杰; 李欣; 陈杨武; 周后珍
Original assignee: Chengdu Institute of Biology of CAS
Current assignee: Chengdu Institute of Biology of CAS
Priority date: 2022-12-28
Filing date: 2022-12-28
Publication date: 2023-07-11
Anticipated expiration: 2032-12-28

Abstract

The utility model belongs to the field of sewage treatment equipment, and particularly relates to a pool-column coupling type membrane photo-biological reaction device for sewage treatment. The specific technical scheme is as follows: the anaerobic treatment device comprises an anaerobic unit and a first treatment unit which are communicated from bottom to top, wherein the anaerobic unit is separated from the first treatment unit through a non-woven fabric, the first treatment unit is connected with a second treatment unit through a first water outlet pipe, the second treatment unit is arranged at the lower part of the first treatment unit, one end of the first water outlet pipe is provided with the upper part of the first treatment unit, the first treatment unit and the second treatment unit are microalgae reaction areas, and the second treatment unit is connected with a sedimentation tank. The algae liquid in the first treatment unit enters the second treatment unit under the action of gravity, and the algae liquid can absorb carbon dioxide by contacting with air in the water fall process, so that the hydraulic retention time is prolonged to improve the sewage treatment effect, and the space is fully utilized.

Description

Pool-column coupling type membrane photo-biological reaction device for sewage treatment

Technical Field

The utility model belongs to the field of sewage treatment equipment, and particularly relates to a pool-column coupling type membrane photo-biological reaction device for sewage treatment.

Background

In recent years, domestic sewage is increased year by year, and effective treatment and disposal of sewage and recycling of pollutants in sewage are important concerns of sewage 'pollution reduction and carbon reduction' and resource recovery. The domestic sewage contains a large amount of nitrogen and phosphorus pollutants, the growth of animals and plants can be influenced by the excessively high nitrogen and phosphorus concentration in the water body, the ecological balance of the water body can be influenced by the rising of the nitrogen and phosphorus concentration in the water body, the eutrophication of the water body is caused, the ecological system is seriously destroyed, and even the human health is threatened.

In the traditional sewage treatment plant, nitrogen and phosphorus in sewage are mainly treated by A/O or A ₂ And removing by combining with a physical and chemical treatment process. But the treated nitrogen is discharged to the atmosphere in the form of nitrogen gas, whereas the conventional treatment process removes phosphorus in the form of phosphate. And because the treatment efficiency is low, the traditional nitrogen and phosphorus removal process needs to prolong the reaction time or improve the sewage backflow to improve the nitrogen and phosphorus removal effect in the sewage, is not easy to keep stable for a long time, and needs to consume more energy sources for realizing better nitrogen and phosphorus removal effect. The traditional process has the problems of high energy consumption, low pollutant treatment efficiency, high cost and the like, and the traditional sewage treatment technology can not meet the increasingly strict emission standard in face of increasingly strict energy consumption and carbon emission requirements.

Therefore, it is important to optimize the conventional treatment process for these technical problems. The microalgae, which is a common unicellular organism in a water body, has the characteristics of short growth cycle, high growth rate, higher photosynthetic efficiency, high nitrogen and phosphorus utilization rate and the like. And microalgae can continuously and rapidly grow under proper conditions, and is suitable for large-scale culture. In the process of treating pollutants in actual wastewater, microalgae can convert nitrogen and phosphorus while removing the pollutants, so that the recycling utilization of the pollutants in the wastewater is realized. And metabolites such as protein, grease and the like generated in the growth process of the microalgae can be used as raw materials for preparing foods and fuels. And the protein and grease content in the microalgae can reach more than 50% and 25% of the dry weight of the cell body respectively, and products such as chlorophyll, carotene, beta-1, 3-glucan and the like can be used in the fields of aquaculture baits, health-care foods, cosmetics, high-end pet feeds and the like.

As an important treatment device for microalgae cultivation and pollutant treatment, the photobioreactor may have an influence on microalgae cultivation and pollutant treatment. The traditional photobioreactor has the defects of low illumination utilization rate, slow microalgae culture rate, poor pollutant treatment effect and the like.

Therefore, if a domestic sewage treatment device which is based on the microalgae biological treatment system and is high in carbon fixation and capable of recycling can be developed, the device has a good industrial application prospect.

Disclosure of Invention

In order to solve the technical problems in the background technology, the utility model provides a pool-column coupling type membrane photo-biological reaction device for sewage treatment, which can treat organic pollutants and nitrogen and phosphorus in sewage at the same time, realize high-efficiency carbon fixation, reduce pollutant discharge and realize resource utilization.

In order to achieve the aim of the utility model, the utility model adopts the following technical scheme: the utility model provides a pond-post coupling formula membrane photo-biological reaction device for sewage treatment, includes from bottom to top intercommunication setting's anoxic unit and first processing unit, anoxic unit separates through the non-woven fabrics with first processing unit, first processing unit has the second processing unit through first outlet pipe connection, the second processing unit sets up in first processing unit lower part, first outlet pipe one end sets up first processing unit upper portion, first processing unit, second processing unit are little algae reaction zone, the second processing unit is connected with the sedimentation tank.

Preferably: the first treatment unit comprises a reaction column, the first water outlet pipe is arranged on the circumferential side wall of the reaction column and near the top of the reaction column, the anoxic unit comprises a treatment tank, and the top of the treatment tank is communicated with the bottom of the reaction column through the non-woven fabric; the second treatment unit comprises a reaction tank, and the bottoms of the treatment tank and the reaction column are arranged in the reaction tank.

Preferably: the top of the treatment tank is provided with a plurality of parallel reaction columns, and the bottom of each reaction column is connected with the top of the treatment tank through one non-woven fabric.

Preferably: the first processing unit is also provided with a return pipe, and the other end of the return pipe is connected with the sedimentation tank through a return pump.

Preferably: the bottom in the treatment tank is provided with a water distributor, the water distributor is connected with a water inlet pipe, and the other end of the water inlet pipe penetrates through the side wall of the reaction tank and stretches out of the reaction tank.

Preferably: the second treatment unit further comprises a circulating pump connected with the reaction tank and a water outlet arranged on the side wall of the reaction tank, and the other end of the water outlet is connected with the sedimentation tank.

Preferably: the sedimentation tank is internally provided with a membrane component, the membrane component is provided with a second water outlet pipe, and the other end of the second water outlet pipe is provided with a water outlet pump.

Preferably: an aeration ring is arranged at the bottom of the sedimentation tank, the aeration ring is connected with an air inlet pipe, and the other end of the air inlet pipe extends out of the sedimentation tank and is connected with an air pump.

Preferably: the top of the reaction column is provided with a top cover, and the top cover is provided with an exhaust port.

The utility model has the following beneficial effects:

1. the first treatment unit is vertically arranged, the second treatment unit is horizontally arranged, algae liquid in the first treatment unit enters the second treatment unit under the action of gravity, the algae liquid can be contacted with air in the water fall process, the dissolved oxygen content in the algae liquid can be improved, the hydraulic retention time is prolonged, the sewage treatment effect is improved, and the space is fully utilized.

2. The activated sludge is combined with the microalgae treatment system, so that not only can organic matters in sewage be removed, but also nitrogen and phosphorus compounds which cannot be removed by the activated sludge can be removed. Algae and metabolites produced by the algae in the biomass conversion process can be used as raw materials of biofuel. Meanwhile, the organic matters after nitrogen and phosphorus conversion can be utilized by microalgae, so that the utilization rate of pollutants in sewage is improved, and the resource utilization is realized.

3. Through setting up back flow and backwash pump, connect sedimentation zone and first processing unit, through the concentrated back algae liquid of membrane module under the effect of backwash pump, through back flow to first processing unit, realize algae liquid at reaction unit internal circulation.

4. By arranging the membrane component in the sedimentation tank, algae can be effectively trapped, so that the separation of algae and water is realized, and the pollutant treatment efficiency is greatly improved; the method can also filter and remove the residual microorganisms, partial organic pollutants, refractory pollutants and the like in the water to obtain relatively clean water, and the relatively clean water is discharged to a clean water tank through a water outlet pipe.

5. The device system is provided with a microalgae vertical processing unit and a microalgae horizontal processing unit which are used as main processing units for pollutant treatment and resource utilization. By separating the sludge zone and the microalgae zone, the influence of the flora on the microalgae can be weakened. And the existence of the vertical processing unit and the horizontal processing unit can improve illumination and CO of the system ₂ The utilization rate is favorable for the growth of microalgae and the removal of pollutants.

Drawings

FIG. 1 is a schematic front view showing the overall structure of a bioreactor of the present utility model;

FIG. 2 is a schematic top view showing the overall structure of the bioreactor of the present utility model;

FIG. 3 is a schematic view of the cross-sectional structure A-A of FIG. 1;

FIG. 4 is a schematic view of the cross-sectional structure D-D of FIG. 1;

FIG. 5 is a schematic view of the cross-sectional structure of C-C in FIG. 1;

FIG. 6 is a schematic view of the cross-sectional structure of F-F in FIG. 1;

FIG. 7 is a schematic view of the cross-sectional structure of G-G in FIG. 2;

FIG. 8 is a schematic view of the cross-sectional structure E-E of FIG. 1.

In the figure: the device comprises a water inlet pipe 1, a treatment tank 2, a water distributor 3, water distribution holes 31, a spacing mechanism 4, a non-woven fabric 41, a first fixing bolt 5, a reaction column 6, a top cover 61, a second fixing bolt 62, a silica gel pad 63, a return pipe 7, a return pump 8, a first water outlet pipe 9, an exhaust port 10, a reaction tank 11, a circulating pump 12, a water outlet 13, a sedimentation tank 14, a membrane component 141, a second water outlet pipe 142, an aeration ring 143, a water outlet pump 15, an air inlet pipe 16 and an air pump 17.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. The technical means used in the examples are conventional means well known to those skilled in the art unless otherwise indicated.

In the description of the present utility model, it should be understood that the terms "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present utility model, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

A pool-column coupling type membrane photo-biological reaction device for sewage treatment is shown in fig. 1-8, and comprises an anoxic unit and a first treatment unit which are communicated from bottom to top, wherein the anoxic unit is separated from the first treatment unit by a spacing mechanism 4, and the lower end of the first treatment unit is fixed to the spacing mechanism 4 by a first fixing bolt 5. Preferably, the spacing mechanism 4 is a non-woven fabric 41, and the activated sludge in the sewage is isolated from the microalgae by providing the non-woven fabric 41. The first processing unit is connected with a second processing unit through a first water outlet pipe 9, the second processing unit is arranged at the lower part of the first processing unit, one end of the first water outlet pipe 9 is provided with the upper part of the first processing unit, the first processing unit and the second processing unit are microalgae reaction areas, and the second processing unit is connected with a sedimentation tank 14.

In order to make full use of space effectively, the first processing unit is arranged vertically, the second processing unit is arranged horizontally, and the two units form a pool-column composite three-dimensional structure. The one end that first outlet pipe 9 and first processing unit are connected sets up in the position that first processing unit is close to lateral wall upper portion, and the algae liquid in the first processing unit gets into the second processing unit under the action of gravity, and the algae liquid can absorb carbon dioxide with the air contact in drop in-process, further strengthens the mass transfer, prolongs the hydraulic retention time in order to improve the treatment effect of sewage.

The first treatment unit in the reaction device is made of a light-transmitting material, the anoxic unit and the second treatment unit are made of concrete or stainless steel, and a plurality of light sources are arranged around the first treatment unit and the second treatment unit.

The sewage enters the anoxic unit for preliminary treatment, the activated sludge is precipitated to the bottom of the anoxic unit, the clear liquid is positioned on the upper part of the activated sludge and enters the first treatment unit through the non-woven fabric 41, the algae liquid of the first treatment unit enters the second treatment unit through the first water outlet pipe 9 under the action of gravity, then the algae liquid of the second treatment unit enters the sedimentation tank 14, and the effluent filtered by the sedimentation tank 14 is discharged to the clean water tank. The active sludge is combined with the microalgae treatment system, so that nitrogen and phosphorus compounds can be effectively removed. Algae and metabolites produced by the algae in the biomass conversion process can be used as raw materials of biofuel. Meanwhile, the organic matters after nitrogen and phosphorus conversion can be utilized by microalgae, so that resource utilization is realized.

Further, the first treatment unit comprises a reaction column 6, the first water outlet pipe 9 is arranged on the circumferential side wall of the reaction column 6 and near the top of the reaction column 6, and algae liquid in the reaction column 6 flows to the second treatment unit under the action of gravity. The top of the reaction column 6 is provided with a top cover 61, the top cover 61 is provided with an exhaust port 10, the top cover is connected with the reaction column 6 through a second fixing bolt 62, and a silica gel pad 63 is further arranged between the top cover 61 and the reaction column 6. The first treatment unit further comprises a return pipe 7, one end of the return pipe 7 is connected with the reaction column 6, and the other end of the return pipe 7 is connected with the sedimentation tank 14 through a return pump 8. The concentrated algae liquid in the sedimentation tank 14 flows back to the reaction column 6 through the return pipe 7 under the action of the return pump 8, so that the algae liquid is circulated in the reaction device. The reaction column 6 is also provided with a sampling port for measuring and analyzing the pollutant composition and the pollutant content in the sewage in the reaction column 6.

Further, the second treatment unit includes a reaction tank 11, a circulation pump 12 connected to the reaction tank 11, and a water outlet 13 provided on a side wall of the reaction tank 11. The anoxic unit and the bottom of the reaction column 6 are arranged in the reaction tank 11. The algae liquid is circulated in the reaction tank 11 by connecting a circulating pump 12 at the side of the reaction tank 11. The other end of the water outlet 13 is connected with the sedimentation tank 14, the water outlet 13 is used for connecting the reaction tank 11 and the sedimentation tank 14, and after the algae liquid in the reaction tank 11 circulates for a period of time, the algae liquid flows to the sedimentation tank 14 through the water outlet 13. The reaction tank 11 is also provided with a sampling port for measuring and analyzing the pollutant composition and the pollutant content in the sewage in the reaction tank 11.

Further, the anoxic unit comprises a treatment tank 2, the top of the treatment tank 2 is communicated with the bottom of the reaction column 6 through the non-woven fabric 41, the whole treatment tank 2 is positioned in the reaction tank 11, the space is fully utilized, and the volume of the reaction device is reduced. The bottom in the treatment tank 2 is provided with a water distributor 3, the water distributor 3 is provided with a plurality of water distribution holes 31, the water distributor 3 is connected with a water inlet pipe 1, and the other end of the water inlet pipe 1 penetrates through the side wall of the reaction tank 11 and stretches out of the reaction tank 11. The treatment tank 2 is also provided with a sampling port, and the sampling port is connected with a sampling tube which penetrates through the reaction tank 11 and extends out of the reaction tank 11, and is used for measuring and analyzing the pollutant composition and the pollutant content in the sewage in the treatment tank 2.

Further, the reaction column 6 may be provided with one or more groups. The top of the treatment tank 2 is provided with a plurality of parallel reaction columns 6, and the bottom of each reaction column 6 is connected with the top of the treatment tank 2 through an independently arranged non-woven fabric 41.

Further, a membrane assembly 141 is disposed in the sedimentation tank 14, a second water outlet pipe 142 is disposed on the membrane assembly 141, a water outlet pump 15 is disposed at the other end of the second water outlet pipe 142, and water in the sedimentation tank 14 is discharged through the water outlet pump 15. Preferably, the membrane module 141 is a ceramic membrane module. The algae liquid is filtered and concentrated by arranging the membrane component 141 in the sedimentation tank 14, so that algae bacteria can be effectively trapped, and separation of the algae bacteria and water can be realized. The bottom of the sedimentation tank 14 is provided with

The aeration ring 143, the aeration ring 143 is connected with intake pipe 16, intake pipe 16 other end 0 stretches out sedimentation tank 14 is connected with air pump 17, and gas passes through air pump 17 and gets into sedimentation tank 14.

By providing the aeration ring 143 below the membrane module 141, aeration is performed in the sedimentation tank 14, and not only can the algae liquid be effectively mixed but also carbon dioxide can be provided as a carbon source for algae bacteria, and oxygen can be provided for growth of an algae bacteria system by aeration. Meanwhile, bubbles formed in the aeration process can float upwards

And the mud and dirt attached to the surface of the membrane component 141 are blown off, so that the flux of the membrane component 141 is improved, and the service life and the use effect of the membrane component 141 are ensured to be 5.

The device combines the activated sludge with the microalgae treatment system, and under the mixed action condition of the two reaction systems, not only can organic matters, nutrients and other pollutants in the sewage be removed, but also the N, P content in the sewage can be metabolized by utilizing the algae coupling system. At the same time, due to algae

The coupling effect of bacteria and algae bacteria can promote the removal effect of the system on pollutants in domestic sewage by 0. The algae coupling system can mutually utilize the metabolites, thereby reducing the influence of the metabolites on the membrane module 141.

Meanwhile, the coupling of microorganisms and algae in the anoxic zone can form a coupling system to promote the growth and metabolism of microalgae in the microalgae system. Separating the anoxic zone from the microalgae zone

Microalgae are protected, and microorganisms in competition with the microalgae are weakened5 effects of the substances on algal growth and metabolism. And the combination of the columnar area and the horizontal pool area fully utilizes the ambient illumination, so that the illumination utilization rate of the system is improved to a certain extent. Meanwhile, by utilizing a columnar area and through a drop effect, the algae liquid and CO in the air are realized ₂ Fully contact and improve CO in the algae liquid ₂ Concentration, promote the growth of microalgae and further degradation and removal of pollutants.

The above embodiments are only illustrative of the preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model, and various modifications, variations, alterations, substitutions made by those skilled in the art to the technical solution of the present utility model should fall within the protection scope defined by the claims of the present utility model without departing from the spirit of the design of the present utility model.

Claims

1. A pond-post coupling formula membrane photo-biological reaction unit for sewage treatment, its characterized in that: the anaerobic treatment device comprises an anaerobic unit and a first treatment unit which are communicated from bottom to top, wherein the anaerobic unit is separated from the first treatment unit through a non-woven fabric (41), the first treatment unit is connected with a second treatment unit through a first water outlet pipe (9), the second treatment unit is arranged at the lower part of the first treatment unit, one end of the first water outlet pipe (9) is provided with the upper part of the first treatment unit, the first treatment unit and the second treatment unit are microalgae reaction areas, and the second treatment unit is connected with a sedimentation tank (14).

2. A pool-column coupled membrane photo-bioreactor apparatus for sewage treatment according to claim 1, wherein: the first treatment unit comprises a reaction column (6), the first water outlet pipe (9) is arranged on the circumferential side wall of the reaction column (6) and near the top of the reaction column, the anoxic unit comprises a treatment tank (2), and the top of the treatment tank (2) is communicated with the bottom of the reaction column (6) through the non-woven fabric (41); the second treatment unit comprises a reaction tank (11), and the bottoms of the treatment tank (2) and the reaction column (6) are arranged in the reaction tank (11).

3. A pool-column coupled membrane photo-bioreactor apparatus for sewage treatment according to claim 2, wherein: the top of the treatment tank (2) is provided with a plurality of parallel reaction columns (6), and the bottom of each reaction column (6) is connected with the top of the treatment tank (2) through a non-woven fabric (41).

4. A pool-column coupled membrane photo-bioreactor apparatus for sewage treatment according to claim 2, wherein: the first treatment unit is further provided with a return pipe (7), and the other end of the return pipe (7) is connected with the sedimentation tank (14) through a return pump (8).

5. A pool-column coupled membrane photo-bioreactor apparatus for sewage treatment according to claim 2, wherein: the water distributor (3) is arranged at the inner bottom of the treatment tank (2), the water distributor (3) is connected with the water inlet pipe (1), and the other end of the water inlet pipe (1) penetrates through the side wall of the reaction tank (11) and stretches out of the reaction tank (11).

6. The pool-column coupled membrane photo-bioreactor apparatus for sewage treatment of claim 4, wherein: the second treatment unit further comprises a circulating pump (12) connected with the reaction tank (11) and a water outlet (13) arranged on the side wall of the reaction tank (11), and the other end of the water outlet (13) is connected with the sedimentation tank (14).

7. A pool-column coupled membrane photo-bioreactor apparatus for sewage treatment according to claim 1, wherein: a membrane assembly (141) is arranged in the sedimentation tank (14), a second water outlet pipe (142) is arranged on the membrane assembly (141), and a water outlet pump (15) is arranged at the other end of the second water outlet pipe (142).

8. The pool-column coupled membrane photo-bioreactor apparatus for sewage treatment of claim 7, wherein: an aeration ring (143) is arranged at the inner bottom of the sedimentation tank (14), the aeration ring (143) is connected with an air inlet pipe (16), and the other end of the air inlet pipe (16) extends out of the sedimentation tank (14) to be connected with an air pump (17).

9. A pool-column coupled membrane photo-bioreactor apparatus for sewage treatment according to claim 2, wherein: the top of the reaction column (6) is provided with a top cover (61), and the top cover (61) is provided with an exhaust port (10).