CN218910108U

CN218910108U - Ultrasonic reinforced AO wastewater treatment integrated device

Info

Publication number: CN218910108U
Application number: CN202223583896.XU
Authority: CN
Inventors: 都小兵; 贾胜勇; 裴元虎; 魏静; 李桂荣
Original assignee: Qingshuiyuan Shanghai Environmental Technology Co ltd
Current assignee: Qingshuiyuan Shanghai Environmental Technology Co ltd
Priority date: 2022-12-30
Filing date: 2022-12-30
Publication date: 2023-04-25
Anticipated expiration: 2032-12-30

Abstract

The utility model relates to an integrated device for ultrasonic strengthening of AO wastewater treatment, which comprises: the water storage tank is used for storing the mixed solution of the activated sludge and the wastewater; the anoxic reaction tank is used for performing anoxic reaction on the activated sludge and wastewater mixed solution pumped by the water storage tank; the aerobic reaction tank is internally provided with a membrane bioreactor for carrying out aerobic reaction on the reaction mixed solution flowing in from the anoxic reaction tank; wherein, the inner wall of the aerobic reaction tank is provided with an ultrasonic vibration plate which is connected with an ultrasonic generator arranged on the outer wall; the sedimentation tank is used for carrying out sedimentation separation on the reaction mixed solution in the aerobic reaction tank. Compared with the prior art, the utility model can effectively realize the biological effect of low-intensity ultrasonic wave enhanced active sludge microorganisms on the metabolic efficiency of wastewater pollutants, and improve the efficiency of wastewater treatment.

Description

Ultrasonic reinforced AO wastewater treatment integrated device

Technical Field

The utility model relates to the technical field of sewage treatment, in particular to an ultrasonic reinforced AO wastewater treatment integrated device.

Background

The aerobic activated sludge process is a conventional wastewater treatment process, and an anoxic biological treatment process (AO process) is added at the front end of the process to form an anoxic/aerobic wastewater treatment process. The AO technology is widely applied to sewage treatment plants, and aerobic microorganisms oxidize and decompose BOD5 in wastewater in an aerobic tank (O tank) and convert ammonia nitrogen into nitrate nitrogen, and simultaneously perform phosphorus absorption reaction; and the nitrifying liquid in the aerobic section flows back to an anoxic tank (tank A) at the front end through a reflux pump, and denitrifying bacteria utilize the returned nitrate nitrogen and available carbon sources in the wastewater to perform denitrification reaction to generate nitrogen, so that the aim of denitrification is fulfilled. Generally, AO-processes rely on optimizing operating parameters to increase their effectiveness in treating wastewater, which means that for some wastewater, once AO-process operating parameters are optimized their effectiveness will reach a bottleneck to further increase. Increasingly stringent wastewater emission standards require AO processes to continuously enhance contaminant removal efficiency, which puts higher demands on further enhancing the metabolic efficiency of microorganisms on contaminants based on AO optimal operating parameters.

The ultrasonic wave generally refers to mechanical waves with the frequency higher than 20kHz, and the biological effect of low-intensity ultrasonic wave on enhancing the metabolic efficiency of activated sludge microorganisms on wastewater pollutants can be effectively realized by regulating and controlling the power density, the action time and the interval action time of the ultrasonic wave on the activated sludge and wastewater mixed solution.

Disclosure of Invention

The utility model aims to overcome the defects of the prior art and provide the ultrasonic reinforced AO wastewater treatment integrated device with high wastewater treatment efficiency.

The aim of the utility model can be achieved by the following technical scheme:

the utility model provides an ultrasonic reinforced AO wastewater treatment integrated device, which comprises:

the water storage tank is used for storing the mixed solution of the activated sludge and the wastewater;

the anoxic reaction tank is used for performing anoxic reaction on the activated sludge and wastewater mixed solution pumped by the water storage tank;

the aerobic reaction tank is internally provided with a membrane bioreactor for carrying out aerobic reaction on the reaction mixed solution flowing in from the anoxic reaction tank; wherein, the inner wall of the aerobic reaction tank is provided with an ultrasonic vibration plate which is connected with an ultrasonic generator arranged on the outer wall;

the sedimentation tank is used for carrying out sedimentation separation on the reaction mixed solution in the aerobic reaction tank.

Preferably, the bottom of the anoxic reaction tank is provided with a perforated wall for flowing the reaction mixture into the aerobic reaction tank.

Preferably, the number of the ultrasonic vibration plates is 2, and the ultrasonic vibration plates are connected through wires and symmetrically arranged on the inner wall of the aerobic reaction tank.

Preferably, two ends of the bottom of one side wall of the anoxic reaction tank are provided with stirrers.

Preferably, the bottom of the side wall at one side of the aerobic reaction tank is penetrated and penetrated with a gas pipe branch pipe, one end of the gas pipe branch pipe positioned in the aerobic reaction tank is connected with an aeration head, a plurality of gas pipe branch pipes are converged on a gas pipe main pipe, a blower is connected on the gas pipe main pipe, and the tail end of the blower is connected with an aerator.

Preferably, the number of the aeration heads is not less than six and is uniformly distributed.

Preferably, a reflux pipeline is further arranged between the aerobic reaction tank and the anoxic reaction tank, and a mixed liquid reflux pump is arranged on the reflux pipeline.

Preferably, the bottom of the sedimentation tank is connected to the anoxic reaction tank through a sludge recovery pipeline, and a sludge recovery pump is further arranged on the sludge recovery pipeline.

Preferably, the side wall of the sedimentation tank is connected with a water outlet pipe.

Preferably, a water inlet pump is connected to a pipeline between the water storage tank and the anoxic reaction tank.

Compared with the prior art, the utility model has the following advantages:

1) The low-intensity ultrasonic wave can not only accelerate the exchange of intracellular and extracellular substances by improving the permeability of microbial cell membranes in the aerobic reaction tank, but also obviously improve the secretion and activity of microbial enzymes in the aerobic reaction tank; research shows that the influence of the low-intensity ultrasonic wave on microorganisms is still continuous for a period of time after the ultrasonic wave is stopped, so that the positive effect of the low-intensity ultrasonic wave on the microorganisms in the anoxic reaction tank is ensured, the metabolism level of the microorganisms in the aerobic reaction tank on pollutants is effectively improved, and the treatment water quality is further improved.

2) The low-intensity ultrasonic waves can effectively change the up-and-down regulation expression of the functional genes of the microorganisms in the aerobic reaction tank, realize that the metabolism of pollutants can achieve the advantage of proliferation by changing the metabolic pathways of the microorganisms, and then control the output of the residual sludge of the AO process by reducing the proliferation rate of the microorganisms, thereby reducing the treatment pressure of the subsequent residual sludge treatment and lowering the cost.

Drawings

FIG. 1 is a schematic view of the apparatus of the present utility model;

reference numerals: 1-water storage tank, 2-water inlet pump, 3-stirrer, 4-shower wall, 5-ultrasonic vibration plate, 6-aeration head, 7-sedimentation tank, 8-blower, 9-sludge reflux pump, 10-blow pipe, 11-gas pipe, 12-ultrasonic generator, 13-wire, 14-anoxic reaction tank, 15-aerobic reaction tank and 16-mixed liquid reflux pump.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, shall fall within the scope of the present utility model.

a water storage tank 1 for storing an activated sludge and wastewater mixture;

the anoxic reaction tank 14 is used for performing anoxic reaction on the mixed liquid of the activated sludge and the wastewater pumped by the water storage tank 1;

an aerobic reaction tank 15 for performing an aerobic reaction on the reaction mixture flowing from the anoxic reaction tank 14; wherein, the inner wall of the aerobic reaction tank 15 is provided with an ultrasonic vibration plate 5 which is connected with an ultrasonic generator 12 arranged on the outer wall;

and the sedimentation tank 7 is used for carrying out sedimentation separation on the reaction mixed solution in the aerobic reaction tank 15.

Next, the specific structure of the device will be described in detail.

A water inlet pump 2 is connected on a pipeline between the water storage tank 1 and the anoxic reaction tank 14.

The two ends of the bottom of one side wall of the anoxic reaction tank 14 are provided with stirrers 3. The bottom of the anoxic reaction tank 14 is provided with a perforated wall 4 for flowing the reaction mixture into the aerobic reaction tank 15.

The bottom of the side wall of one side of the aerobic reaction tank 15 is penetrated and penetrated with a branch pipe of the gas pipe 11, one end of the branch pipe of the gas pipe 11 positioned in the aerobic reaction tank 15 is connected with an aeration head 6, a plurality of branch pipes of the gas pipe are gathered on a main pipe of the gas pipe, the main pipe of the gas pipe is connected with a blower 8, and the tail end of the blower 8 is connected with an aerator. The number of the aeration heads 6 is not less than six, and the aeration heads are uniformly distributed on two sides of the plate type membrane assembly.

In the embodiment, the inner walls of the two sides of the aerobic reaction tank 15 are provided with mounting frames, the number of the ultrasonic vibration plates 5 is 2, the ultrasonic vibration plates are symmetrically arranged on the inner wall of the aerobic reaction tank 15 through the mounting frames, and the two ultrasonic vibration plates 5 are connected through a wire.

A reflux pipeline is also arranged between the aerobic reaction tank 15 and the anoxic reaction tank 14, and a mixed liquid reflux pump 16 is arranged on the reflux pipeline. The mixed liquor of the activated sludge and the wastewater in the aerobic reaction tank 15 flows back to the anoxic reaction tank 14 through a mixed liquor reflux pump, and the reflux quantity of the nitrifying liquor is regulated through a mixed liquor reflux pump 16.

The bottom of the sedimentation tank 7 is connected to the anoxic reaction tank 14 through a sludge recovery pipeline, and a sludge recovery pump 9 is also arranged on the sludge recovery pipeline. The side wall of the sedimentation tank 7 is connected with a water outlet pipe 10.

The water treatment flow of the ultrasonic reinforced A/O wastewater treatment device adopting the embodiment is as follows:

1) The wastewater is pumped into the anoxic reaction tank 14 through the water inlet pump 2 and the water inlet pipe, and then enters the aerobic reaction tank 15 through the perforated wall 4;

2) The sludge concentration in the anoxic reaction tank 14 and the aerobic reaction tank 15 is kept at 4000mg/L, the hydraulic retention time of the anoxic reaction tank 14 is 2 hours, and the hydraulic retention time of the aerobic reaction tank 15 is 4 hours;

3) Starting an air blower 8 to input air into the membrane bioreactor through an air pipe 11 main pipe and an air pipe branch pipe and an aeration head 6, keeping the concentration of dissolved oxygen in the membrane bioreactor to be 4.0mg/L, and enabling the air blower 8 to operate without stopping;

4) Starting a mixed liquor reflux pump 16, and refluxing the mixed liquor of the aerobic reaction tank 15 to the anoxic reaction tank 14, wherein the flow rate of the mixed liquor reflux pump is 2 times that of the water inlet pump;

5) Hoisting the two ultrasonic vibration plates 5 into an aerobic reaction tank, opening an ultrasonic generator 12 corresponding to the ultrasonic vibration plates, keeping the power density in the aerobic reaction tank 15 to be 6W/L, and continuously operating for 15 minutes;

6) The ultrasonic generator 12 is turned off for 24 hours, then the ultrasonic generator 12 corresponding to the ultrasonic generator is turned on, the power density in the aerobic reaction tank 15 is kept at 6W/L, the operation is continued for 15 minutes, and the cycle is repeated.

While the utility model has been described with reference to certain preferred embodiments, it will be understood by those skilled in the art that various changes and substitutions of equivalents may be made and equivalents will be apparent to those skilled in the art without departing from the scope of the utility model. Therefore, the protection scope of the utility model is subject to the protection scope of the claims.

Claims

1. An ultrasonic-enhanced AO wastewater treatment integrated device, comprising:

a water storage tank (1) for storing an activated sludge and wastewater mixture;

the anoxic reaction tank (14) is used for carrying out anoxic reaction on the mixed liquid of the activated sludge and the wastewater pumped by the water storage tank (1);

an aerobic reaction tank (15) in which a membrane bioreactor is arranged for carrying out an aerobic reaction on the reaction mixture flowing in from the anoxic reaction tank (14); wherein, the inner wall of the aerobic reaction tank (15) is provided with an ultrasonic vibration plate (5) which is connected with an ultrasonic generator (12) arranged on the outer wall;

and the sedimentation tank (7) is used for carrying out sedimentation separation on the reaction mixed solution in the aerobic reaction tank (15).

2. The integrated device for ultrasonic enhanced AO wastewater treatment according to claim 1, wherein a perforated wall (4) for flowing the reaction mixture into the aerobic reaction tank (15) is arranged at the bottom of the anoxic reaction tank (14).

3. The integrated device for ultrasonic-enhanced AO wastewater treatment according to claim 1, wherein the number of the ultrasonic vibration plates (5) is 2, and the ultrasonic vibration plates are connected through wires and symmetrically arranged on the inner wall of the aerobic reaction tank (15).

4. The ultrasonic-enhanced AO wastewater treatment integrated device according to claim 1, wherein the two ends of the bottom of one side wall of the anoxic reaction tank (14) are provided with stirrers (3).

5. The integrated device for the ultrasonic enhanced AO wastewater treatment according to claim 1, wherein the bottom end of the side wall of one side of the aerobic reaction tank (15) is penetrated and penetrated with a branch pipe of a gas pipe (11), one end of the branch pipe of the gas pipe (11) positioned in the aerobic reaction tank (15) is connected with an aeration head (6), a plurality of branch pipes of the gas pipe are collected on a main pipe of the gas pipe, a blower (8) is connected on the main pipe of the gas pipe, and the tail end of the blower (8) is connected with an aerator.

6. An ultrasonic-enhanced AO wastewater treatment integrated apparatus according to claim 5, wherein the number of said aeration heads (6) is not less than six and is uniformly distributed.

7. An integrated device for ultrasonic enhanced AO wastewater treatment according to claim 1, wherein a reflux pipeline is further arranged between the aerobic reaction tank (15) and the anoxic reaction tank (14), and a mixed liquid reflux pump (16) is arranged on the reflux pipeline.

8. An integrated device for ultrasonic enhanced AO wastewater treatment according to claim 1, wherein the bottom of the sedimentation tank (7) is connected to an anoxic reaction tank (14) through a sludge recovery pipeline, and a sludge recovery pump (9) is further arranged on the sludge recovery pipeline.

9. An integrated device for ultrasonic enhanced AO wastewater treatment according to claim 1, wherein a water outlet pipe (10) is connected to the side wall of the sedimentation tank (7).

10. An integrated device for ultrasonic enhanced AO wastewater treatment according to claim 1, wherein a water inlet pump (2) is connected to a pipeline between the water storage tank (1) and the anoxic reaction tank (14).