CN211546257U

CN211546257U - Highly integrated improved A/A/O-MBR integrated sewage treatment device

Info

Publication number: CN211546257U
Application number: CN201922184205.0U
Authority: CN
Inventors: 王冰; 魏拓
Original assignee: Biliu Tianeng Beijing Science And Technology Co ltd
Current assignee: Biliu Tianeng Beijing Science And Technology Co ltd
Priority date: 2019-12-09
Filing date: 2019-12-09
Publication date: 2020-09-22
Anticipated expiration: 2029-12-09

Abstract

The utility model relates to a high integrated improvement AO-MBR integration sewage treatment plant, it includes into water unit, improvement AO system unit, MBR membrane system unit and equipment room, and the unit of intaking includes the inlet channel, and improvement AO system unit includes anaerobism pond, facultative tank, oxygen deficiency pond and good oxygen pond, inlet channel, anaerobism pond, facultative tank, oxygen deficiency pond and good oxygen pond are for setting up the baffle intercommunication that baffles in proper order in a cell body, and the cell body still sets up the membrane pond, the equipment room and the play water disinfection pond of installation MBR membrane system unit, and MBR membrane system unit is connected with good oxygen pond. The utility model discloses a highly integrated improvement AO-MBR integration sewage treatment plant on the basis of traditional AO technology, on the characteristics that combine MBR technology, optimizes the improvement to the combination technology, optimizes energy-efficient more after the combination.

Description

Highly integrated improved A/A/O-MBR integrated sewage treatment device

Technical Field

The utility model relates to a sewage biological treatment technical field, concretely relates to high integrated improvement AO-MBR integration sewage treatment plant.

Background

The A/A/O process, namely an anaerobic-anoxic-aerobic activated sludge method, is the most simple and widely applied nitrogen and phosphorus removal process. The method is developed by some experts in the United states on the basis of the AO denitrification process in the 70 th 20 th century. The sewage firstly enters an anaerobic tank, phosphorus accumulating bacteria carried by the returned sludge decompose phosphorus accumulating in the body, the phosphorus accumulating bacteria release phosphorus, one part of the released energy can be used for the aerobic phosphorus accumulating bacteria to keep living in an anaerobic environment, and the other part of the released energy is used for the phosphorus accumulating bacteria to actively absorb VFAs and store PHB in the body. The phosphorus-accumulating bacteria not only absorb and utilize the easily degradable BOD remained in the sewage, but also mainly decompose PHB stored in the body to generate energy for self growth and reproduction, and actively absorb the dissolved phosphorus in the environment, which is phosphorus-absorbing and stored in the body in the form of phosphorus accumulation. The sewage passes through the anaerobic and anoxic zones, and the organic matters are utilized by the phosphorus accumulating bacteria and the denitrifying bacteria respectively, so that the concentration is very low, and the growth and the propagation of the autotrophic nitrifying bacteria are facilitated. And finally, the mixed liquid enters a sedimentation tank for mud-water separation, the supernatant is discharged as treated water, one part of the precipitated sludge flows back to the anaerobic tank, and the other part of the precipitated sludge is discharged as residual sludge. In the A/A/O process, an anaerobic tank is used for biological phosphorus release, an anoxic tank is used for denitrification, carbon source substances in raw sewage firstly enter the anaerobic tank, phosphorus accumulating bacteria preferentially utilize easily biodegradable organic matters in the sewage to become dominant flora, conditions are created for dephosphorization, the sewage then enters the anoxic tank, and denitrifying bacteria utilize other carbon sources possibly utilized to reduce nitrate nitrogen which flows back to the anoxic tank into nitrogen to be discharged into the atmosphere, so that the aim of denitrification is fulfilled.

The membrane treatment technology is a new water treatment technology based on membrane separation materials. Engineering applications of membrane separation technology began in the desalination of sea water in the 60's of the 20 th century. The initial application of membrane technology in municipal sewage treatment is to replace the traditional secondary sedimentation tank with an ultrafiltration membrane, which achieves excellent effects. In the 80 s of the 20 th century, with the development and improvement of membrane technology, Membrane Bioreactors (MBR) began to be introduced into the field of municipal and industrial wastewater treatment. The integrated combined new process integrates the biodegradation of the bioreactor and the efficient membrane separation technology, and has the features of high and stable effluent quality, high treating load, small apparatus area, small sludge yield, simple operation, etc.

However, when the MBR process is operated, in order to avoid membrane filament pollution, aeration with high intensity is carried out in the membrane tank, the concentration of dissolved oxygen (RO) in the membrane tank is high, and in order to avoid waste of high-concentration dissolved oxygen in the membrane tank, a large amount of sludge in the membrane tank is refluxed to the aerobic tank for nitrifying bacteria to utilize. In order to maintain reasonable sludge concentration distribution of each biochemical unit and carbon-nitrogen ratio of denitrification of raw sewage, the A/A/O process needs to return sludge in the aerobic tank to the front anoxic tank, and dissolved oxygen carried in the returned sludge consumes carbon sources in the sewage on one hand and adversely affects denitrification and phosphorus release reaction environments on the other hand. Therefore, on the basis of the traditional A/A/O process, the optimization and improvement of the combined process are needed to be carried out by combining the characteristics of the MBR process, and a more efficient and energy-saving optimized combined process is developed.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art not enough, provide a high integrated improvement AO-MBR integration sewage treatment plant, improve sewage treatment efficiency, the energy saving cost.

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

the utility model provides a high integrated improvement A/A/O-MBR integration sewage treatment plant which characterized in that: including water inlet unit, improvement A/O system unit, MBR membrane system unit and equipment room, water inlet unit includes the inlet channel, and improvement A/O system unit includes anaerobism pond, facultative tank, oxygen deficiency pond and good oxygen pond, inlet channel, anaerobism pond, facultative tank, oxygen deficiency pond and good oxygen pond are for setting up the baffle through setting up the intercommunication of baffling in proper order in a cell body, and the cell body still sets up the membrane pond, the equipment room and the play water disinfection pond of installation MBR membrane system unit, and MBR membrane system unit is connected with good oxygen pond.

And the membrane treatment unit is an immersed membrane treatment unit arranged in a membrane tank connected with the aerobic tank in series or an external membrane treatment unit.

And, inlet channel and anaerobism pond top intercommunication, anaerobism pond and facultative tank bottom intercommunication, facultative tank and oxygen deficiency pond top intercommunication, oxygen deficiency pond and aerobic tank bottom intercommunication, aerobic tank and membrane pond top intercommunication.

Moreover, the equipment room comprises a water outlet pool, an ultraviolet disinfection system, a blast aeration system, a membrane cleaning system, a dosing system and an automatic control system.

And the sludge of the membrane treatment unit flows back to the water inlet end of the aerobic pool of the improved A/A/O system unit through the first circulating pump, wherein the reflux ratio is 300-400%.

And the mixed liquid at the water outlet end of the aerobic tank flows back to the water inlet end of the facultative tank through a second circulating pump, and the reflux ratio is 100-200%.

And the mixed liquid at the water outlet end of the anoxic tank flows back to the water inlet end of the anaerobic tank by a third circulating pump, and the reflux ratio is 100-200%.

And the automatic control system comprises a PLC control unit, the anaerobic tank, the facultative tank, the anoxic tank, the aerobic tank and the membrane treatment unit are all provided with a liquid level sensor, a pH/temperature sensor and a pressure sensor, and the PLC control unit receives signals output by the liquid level sensor, the pH/temperature sensor and the pressure sensor and controls the start and stop of the first circulating pump, the second circulating pump and the third circulating pump.

The utility model discloses an advantage and beneficial effect do:

1. the utility model discloses a highly integrated improvement AO-MBR integration sewage treatment plant on the basis of traditional AO technology, on the characteristics that combine MBR technology, optimizes the improvement to the combination technology, optimizes energy-efficient more after the combination.

2. The utility model discloses a high integrated improvement AO-MBR integration sewage treatment plant, great reduction area, can realize the effect of high-efficient treatment sewage in limited space.

3. The utility model discloses a highly integrated improvement AO-MBR integration sewage treatment plant improves traditional AO technology, and a large amount of dissolved oxygen (RO) that mixed liquid of good oxygen pond backward flow of high sludge concentration smuggled secretly gets into the oxygen deficiency pond after the dissolved oxygen that consumes in the facultative tank earlier, has ensured the living environment of oxygen deficiency pond microorganism, can realize efficient biological denitrogenation, reduces investment and running cost.

4. The utility model discloses a highly integrated improvement AO-MBR integration sewage treatment plant under the condition of anaerobism, facultative, oxygen deficiency, good oxygen operation in turn, can restrain the reproduction of filamentous fungus, overcomes the mud inflation, is favorable to the reproductive growth of different microbial floras, is favorable to domesticating the bacterial that has the adaptability to the difficult degradation pollutant, and nitrogen and phosphorus removal is effectual.

5. The utility model discloses a highly integrated improvement AO-MBR integration sewage treatment plant can realize high automated control, and operation easy operation is convenient for maintain.

Drawings

Fig. 1 is a schematic flow chart of the present invention.

Description of the reference numerals

1-a water inlet channel, 2-an anaerobic tank, 3-a facultative tank, 4-an anoxic tank, 5-an aerobic tank, 6-a second circulating pump, 7-a membrane tank, 8-a plant room, 9-a water outlet disinfection tank, 10-a first circulating pump and 11-a third circulating pump.

Detailed Description

The present invention will be described in further detail with reference to specific examples, which are provided for illustrative purposes only, and are not intended to be limiting, and the scope of the present invention should not be limited thereby.

The utility model provides a highly integrated improvement A/A/O-MBR integration sewage treatment plant, it includes the unit of intaking, improvement A/A/O system unit, MBR membrane system unit and equipment room, the unit of intaking includes inlet channel 1, improvement A/O system unit includes anaerobism pond 2, facultative tank 3, oxygen deficiency pond 4 and good oxygen pond 5, the inlet channel, the anaerobism pond, facultative tank, oxygen deficiency pond and good oxygen pond are for setting up the baffle intercommunication in proper order in a cell body, the cell body still sets up the membrane pond 7 of installation MBR membrane system unit, equipment room 8 and play water disinfection pond 9, MBR membrane system unit is connected with good oxygen pond.

The membrane treatment unit is an immersed membrane treatment unit arranged in a membrane tank connected with the aerobic tank in series or an external membrane treatment unit. The inlet channel communicates with the top of the anaerobic tank, the bottom of the anaerobic tank communicates with the bottom of the facultative tank, the top of the facultative tank communicates with the top of the anoxic tank, the bottom of the anoxic tank communicates with the bottom of the aerobic tank, and the top of the aerobic tank communicates with the top of the membrane tank. The equipment room comprises a water outlet pool 9, an ultraviolet disinfection system, a blast aeration system, a membrane cleaning system, a dosing system and an automatic control system.

The sludge of the membrane treatment unit flows back to the water inlet end of the aerobic pool of the improved A/A/O system unit through the first circulating pump 10, and the reflux ratio is 300-400%. The mixed liquid at the water outlet end of the aerobic pool flows back to the water inlet end of the facultative tank through a second circulating pump 6, and the reflux ratio is 100-200%. The mixed liquid at the water outlet end of the anoxic tank flows back to the water inlet end of the anaerobic tank by a third circulating pump 11, and the reflux ratio is 100-200%.

The automatic control system comprises a PLC control unit, wherein the anaerobic pool, the facultative tank, the anoxic pool, the aerobic pool and the membrane treatment unit are respectively provided with a liquid level sensor, a pH/temperature sensor and a pressure sensor, and the PLC control unit receives signals output by the liquid level sensor, the pH/temperature sensor and the pressure sensor and controls the start and stop of the first circulating pump, the second circulating pump and the third circulating pump.

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 high integrated improvement A/A/O-MBR integration sewage treatment plant which characterized in that: including water inlet unit, improvement A/O system unit, MBR membrane system unit and equipment room, water inlet unit includes the inlet channel, and improvement A/O system unit includes anaerobism pond, facultative tank, oxygen deficiency pond and good oxygen pond, inlet channel, anaerobism pond, facultative tank, oxygen deficiency pond and good oxygen pond are for setting up the baffle through setting up the intercommunication of baffling in proper order in a cell body, and the cell body still sets up the membrane pond, the equipment room and the play water disinfection pond of installation MBR membrane system unit, and MBR membrane system unit is connected with good oxygen pond.

2. The highly integrated improved a/O-MBR integrated sewage treatment plant according to claim 1, characterized in that: the MBR membrane system unit is an immersed membrane treatment unit arranged in a membrane tank connected with the aerobic tank in series or an external membrane treatment unit.

3. The highly integrated improved a/O-MBR integrated sewage treatment plant according to claim 1, characterized in that: the utility model discloses a membrane pond, including inlet channel and anaerobism pond top intercommunication, anaerobism pond and facultative tank bottom intercommunication, facultative tank and oxygen deficiency pond top intercommunication, oxygen deficiency pond and aerobic tank bottom intercommunication, aerobic tank and membrane pond top intercommunication.

4. The highly integrated improved a/O-MBR integrated sewage treatment plant according to claim 1, characterized in that: the equipment room comprises a water outlet pool, an ultraviolet disinfection system, a blast aeration system, a membrane cleaning system, a dosing system and an automatic control system.

5. The highly integrated improved a/O-MBR integrated sewage treatment plant according to claim 1, characterized in that: and the sludge of the membrane treatment unit flows back to the water inlet end of the aerobic pool of the improved A/A/O system unit through the first circulating pump, wherein the reflux ratio is 300-400%.

6. The highly integrated improved a/O-MBR integrated sewage treatment plant according to claim 1, characterized in that: and the mixed liquid at the water outlet end of the aerobic pool flows back to the water inlet end of the facultative tank through a second circulating pump, and the reflux ratio is 100-200%.

7. The highly integrated improved a/O-MBR integrated sewage treatment plant according to claim 1, characterized in that: and the mixed liquor at the water outlet end of the anoxic tank flows back to the water inlet end of the anaerobic tank by a third circulating pump, and the reflux ratio is 100-200%.

8. The highly integrated improved A/A/O-MBR integrated sewage treatment unit according to claim 4, wherein: the automatic control system comprises a PLC control unit, wherein the anaerobic tank, the facultative tank, the anoxic tank, the aerobic tank, the membrane treatment unit and the effluent disinfection tank are respectively provided with a liquid level sensor, a pH/temperature sensor and a pressure sensor, and the PLC control unit receives signals output by the liquid level sensor, the pH/temperature sensor and the pressure sensor and controls the start and stop of the first circulating pump, the second circulating pump and the third circulating pump.