CN108483651A - The modified form multi-mode operation A adjusted based on water quality and quantity2O reaction tanks and sewage disposal system - Google Patents

Abstract

An improved multi-mode operation ^A2O reaction pool based on water quality and water quantity adjustment disclosed by the present invention includes: a pre-anoxic pool, an anaerobic pool, anoxic pool, an aerobic pool and a sedimentation pool connected sequentially through pipelines; An electromagnetic flowmeter installed on the water inlet pipeline for monitoring the amount of water inflow; a water quality monitoring device installed on the water inlet pipeline; a number of electric shut-off valves installed in various parts of the reaction pool; and a PLC A control system, the PLC control system is respectively connected with the electromagnetic flowmeter, the water quality monitoring device and several electric shut-off valves. The invention also discloses a sewage treatment system comprising the above-mentioned improved multi-mode operation ^A2O reaction pool. The multi-mode operation A ² O reaction pool of the present invention can automatically switch the operation mode according to the change of the influent water quality and/or influent water volume, and fully exert the maximum effect of the two independent pools of anaerobic and anoxic to realize the treatment of sewage Carry out biological denitrification and biological phosphorus removal.

Description

Improved multi-mode operation A2O reaction pool and sewage treatment based on water quality and quantity adjustment system

technical field

The invention relates to the technical field of sewage treatment systems, in particular to an improved multi-mode operation ^A2O reaction pool and a sewage treatment system based on water quality and quantity regulation.

Background technique

With the rapid development of the economy, the problems of water pollution and eutrophication are becoming more and more serious, and the discharge standards of sewage nitrogen and phosphorus in various countries are also constantly improving. Therefore, the research and development of highly efficient and economical sewage phosphorus and nitrogen removal process has become the research focus and hotspot in the field of sewage control.

Sewage biological treatment is the main treatment method of urban sewage. Biochemical treatment can be divided into biofilm method and activated sludge method according to the existing state of microorganisms in the treatment structure. Among them, the fixed biofilm process applied to urban sewage treatment plants mainly includes BAF biological filter, biological contact oxidation, biological turntable and biological fluidized bed. Activated sludge method is the most widely used sewage treatment technology. It has the advantages of good treatment effect, stable effluent quality, rich operation experience and low cost in treating organic wastewater. It is widely used in urban sewage treatment plants at home and abroad.

In recent years, with the development of sewage treatment technology, the form of activated sludge process has developed from the traditional type to a variety of improved types, but all biological phosphorus and nitrogen removal processes include anaerobic, anoxic, and aerobic processes. alternating cycles of different processes. Among them, the more widely used and more mature methods include traditional activated sludge method, A/O method, A/A/O method (including Bardenpho, ordinary A ² O, improved A ² O, UCT, MUCT, VIP, inverted A ² O process, multi-point water inversion A ² O process, etc.), AB method, oxidation ditch method, SBR method, membrane bioreactor technology (MBR), etc. However, due to the differences in the inflow and water quality of sewage in different seasons, the existing A ² O reaction tank cannot control the total nitrogen and/or total nitrogen in the water body due to the single operation mode when the influent water quality and/or influent water quantity change Or the total phosphorus treatment reaches the standard. For this reason, the applicant has conducted useful explorations and attempts, and has found a solution to the above-mentioned problems, and the technical solutions to be introduced below are produced under this background.

Contents of the invention

One of the technical problems to be solved by the present invention is: the existing A ² O reaction pool cannot treat the total nitrogen and/or total phosphorus in the water body due to the single operation mode when the influent water quality and/or influent water volume change In view of the standard problem, an improved multi-mode operation A ² O reaction pool based on water quality and water volume regulation can be provided to provide a guarantee for dephosphorization by adjusting the operation mode according to the change of influent water quality and/or influent water volume.

The second technical problem to be solved by the present invention is to provide a sewage treatment system including the above-mentioned improved multi-mode operation A ² O reaction pool based on water quality and water volume regulation.

As the first aspect of the present invention, an improved multi-mode operation ^A2O reaction pool based on water quality and water volume regulation includes:

Pre-anoxic tank, anaerobic tank, anoxic tank, aerobic tank and sedimentation tank connected by pipelines in sequence;

A water inlet pipe, one end of the water inlet pipe is the water inlet end, and the other end is connected to the water inlet end of the pre-anoxic tank;

An electromagnetic flowmeter installed on the water inlet pipeline for monitoring the amount of water inlet;

A water quality monitoring device installed on the water inlet pipeline for monitoring the COD, BOD, ammonia nitrogen and total phosphorus content of the incoming water;

A first electric shut-off valve installed on the water inlet pipeline;

A transition pipeline, one end of the transition pipeline is connected to the water inlet pipeline and is located in front of the water inlet end of the first electric shut-off valve, and the other end is connected to the anaerobic tank;

a second electric shut-off valve installed on the transition pipeline;

A first mixed liquid return pipeline, one end of the first mixed liquid return pipeline is connected to the pipeline between the aerobic tank and the sedimentation tank, and the other end is connected to the anaerobic tank and the anoxic tank on the pipeline;

A third electric stop valve installed on the first mixed liquid return pipeline;

A second mixed liquid return pipeline, one end of the second mixed liquid return pipeline is connected to the pipeline between the aerobic tank and the sedimentation tank, and the other end is connected to the pre-anoxic tank and the anaerobic tank. on pipes between pools;

A fourth electric shut-off valve installed on the second mixed liquid return pipeline;

A third mixed liquid return pipeline, one end of the third mixed liquid return pipeline is connected to the pipeline between the aerobic tank and the sedimentation tank, and the other end is connected to the pre-anoxic tank;

A fifth electric stop valve installed on the third mixed liquid return pipeline;

A first sludge return pipeline, one end of the first sludge return pipeline is connected to the sludge outlet of the sedimentation tank, and the other end is connected to the pre-anoxic tank;

A sixth electric shut-off valve installed on the first sludge return pipeline;

A second sludge return pipeline, one end of the second sludge return pipeline is connected to the sludge outlet of the sedimentation tank, and the other end is connected to the anaerobic tank;

a seventh electric shut-off valve installed on the second sludge return pipeline; and

A PLC control system, the PLC control system is respectively connected with the electromagnetic flowmeter, the water quality monitoring device and the first, second, third, fourth, fifth, sixth and seventh electric stop valves.

As a sewage treatment system according to the second aspect of the present invention, it includes a coarse grid inlet pump room, a fine grid swirl grit chamber, an ^A2O reaction tank, a secondary sedimentation tank, a lifting pump room, and a flocculation sedimentation tank connected in sequence . A filter cloth filter and a disinfection and oxidation tank, wherein the A ² O reaction tank is the above-mentioned improved multi-mode operation A ² O reaction tank based on water quality and water quantity regulation.

In a preferred embodiment of the present invention, an overflow rainwater pipe is arranged between the fine grid cyclone sedimentation tank and the flocculation sedimentation tank.

Due to the adoption of the above technical scheme, the beneficial effect of the present invention is that: the multi-mode operation ^A2O reaction tank of the present invention can automatically switch operation modes according to the change of influent water quality and/or influent water volume, and fully utilizes anaerobic, The maximum efficiency of the two independent pools of hypoxia is used to realize the biological denitrification and biological phosphorus removal of sewage.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is a structural schematic diagram of the sewage treatment system of the present invention.

Fig. 2 is a structural schematic diagram of the improved multi-mode operation A ² O reaction cell of the present invention.

Fig. 3 is a schematic diagram of the improved multi-mode operation A ² O reaction cell of the present invention in the conventional A ² O operation mode.

Fig. 4 is a schematic diagram of the improved multi-mode operation A ² O reaction cell of the present invention in the improved A ² O operation mode.

Fig. 5 is a schematic diagram of the improved multi-mode operation A ² O reaction cell of the present invention in an inverted A ² O operation mode.

Detailed ways

In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific illustrations.

Referring to Fig. 1, a sewage treatment system is shown in the figure, including a coarse-grid inlet pump house 100, a fine-grid cyclone grit chamber 200, an improved multi-mode operation ^A2O reaction tank 300, Secondary sedimentation tank 400, lifting pump room 500, flocculation sedimentation tank 600, filter cloth filter tank 700 and disinfection and oxidation tank 800. Wherein, the filter cloth filter 700 is preferably a fiber filter cloth filter, and the disinfection and oxidation tank 800 is preferably an ultraviolet disinfection and oxidation tank.

An overflow rainwater pipe 900 is arranged between the fine grid cyclone grit chamber 200 and the flocculation sedimentation tank 600, so that the fine grid cyclone grit chamber 200 can overflow to the flocculation through the overflow rainwater pipe 900 when there is a large amount of water in the rainstorm period. Sedimentation tank 600.

Improved multi-mode operation A ² O reaction pool 300, including pre-anoxic pool 301, anaerobic pool 302, anoxic pool 303, aerobic pool 304, sedimentation pool 305, water inlet pipe 306, electromagnetic flowmeter 307, water quality Monitoring device 308, transition pipeline 309, mixed liquid return pipeline 310, 311, 312, sludge return pipeline 313, 314, electric stop valve 315, 316, 317, 318, 319, 320, 321 and PLC control system.

Pre-anoxic tank 301, anaerobic tank 302, anoxic tank 303, aerobic tank 304 and sedimentation tank 305 are connected through pipelines in sequence, and the water outlet of sedimentation tank 305 is connected with the water inlet of secondary sedimentation tank 400 through pipelines. One end of the water inlet pipe 306 is the water inlet end and is connected with the water outlet end of the fine grid cyclone grit chamber 200 , and the other end is connected with the water inlet end of the pre-anoxic tank 301 . The electromagnetic flowmeter 307 is installed on the water inlet pipe 306 , which is used to monitor the water inlet volume of the improved multi-mode operation A ² O reaction pool 300 . The water quality monitoring device 308 is installed on the water inlet pipeline 306 and behind the electromagnetic flowmeter 307, and it is used to monitor the COD, BOD, ammonia nitrogen and total phosphorus content of the water inlet. The electric stop valve 315 is installed on the water inlet pipe 306 and is located behind the water quality monitoring device 308 . One end of the transition pipeline 309 is connected to the water inlet pipeline 306 and is located in front of the water inlet end of the electric shut-off valve 315 , and the other end is connected to the anaerobic tank 302 . The electric stop valve 316 is installed on the transition pipe 309 . One end of the mixed liquid return pipeline 310 is connected to the pipeline between the aerobic tank 304 and the sedimentation tank 305 , and the other end is connected to the pipeline between the anaerobic tank 302 and the anoxic tank 303 . The electric cut-off valve 317 is installed on the mixed liquid return pipeline 310 . One end of the mixed liquid return pipeline 311 is connected to the pipeline between the aerobic tank 304 and the sedimentation tank 305 , and the other end is connected to the pipeline between the pre-anoxic tank 301 and the anaerobic tank 302 . The electric stop valve 318 is installed on the mixed liquid return pipeline 311 . One end of the mixed liquid return pipeline 312 is connected to the pipeline between the aerobic tank 304 and the sedimentation tank 305 , and the other end is connected to the pre-anoxic tank 301 . The electric cut-off valve 319 is installed on the mixed liquid return pipeline 312 . One end of the sludge return pipe 313 is connected to the sludge outlet of the sedimentation tank 305 , and the other end is connected to the pre-anoxic tank 301 . The electric stop valve 320 is installed on the sludge return pipeline 313 . One end of the sludge return pipe 314 is connected to the sludge outlet of the sedimentation tank 305 , and the other end is connected to the anaerobic tank 302 . The electric stop valve 321 is installed on the sludge return pipeline 314 . The PLC control system is respectively connected with the electromagnetic flowmeter 307, the water quality monitoring device 308 and the electric stop valves 315, 316, 317, 318, 319, 320, 321.

The sewage transported by the municipal sewage pipeline first enters the coarse grid inlet pump room 100 to remove larger floating objects in the sewage, and the sewage is lifted to the fine grid cyclone grit chamber 200 to further remove the floating objects and specific gravity in the sewage For sand particles greater than 2.65 and particle size greater than 0.2mm, the sewage then enters the improved multi-mode operation ^A2O reaction pool 300, the electromagnetic flowmeter 307 and the water quality monitoring device 308 monitor the influent water quantity and influent water quality of the sewage respectively, and according to the current The influent water volume and/or influent water quality are used to adjust the operation mode of the improved multi-mode operation A ² O reaction tank 300, and then the sewage enters the secondary sedimentation tank 400, the lifting pump room 500, the flocculation sedimentation tank 600, and the filter cloth filter in sequence 700 and the disinfection and oxidation pool 800, and finally the treated sewage is discharged into the river system.

The improved multi-mode operation A ² O reaction cell 300 has three operation modes, which are conventional A ² O operation mode, improved A ² O operation mode and inverted A ² O operation mode. When it is necessary to switch to the conventional ^A2O operation mode, the electric shut-off valves 315, 318, 319, 320 are closed, and the simplified schematic diagram is shown in Figure 3; when it is necessary to switch to the improved ^A2O operation mode, the The electric shut-off valves 318, 319, 321 are closed, the simplified schematic diagram is shown in Figure 4; when it is necessary to switch to the inverted ^A2O operation mode, the electric shut-off valves 315, 317, 318, 321 are closed, the simplified schematic diagram As shown in Figure 5.

Table 1 shows the quality of untreated sewage, and Table 2 shows the quality of clear water obtained through the sewage treatment system of the present invention. The effluent quality meets the national first-class A standard.

Table 1 Influent water quality

Table 2 Effluent water quality

The basic principles and main features of the present invention and the advantages of the present invention have been shown and described above. Those skilled in the industry should understand that the present invention is not limited by the above-mentioned embodiments, and what described in the above-mentioned embodiments and the description only illustrates the principles of the present invention, and the present invention will also have other functions without departing from the spirit and scope of the present invention. Variations and improvements are possible, which fall within the scope of the claimed invention. The protection scope of the present invention is defined by the appended claims and their equivalents.

Claims (3)

1. a kind of modified form multi-mode operation A adjusted based on water quality and quantity²O reaction tanks, which is characterized in that including：

Pass sequentially through preposition anoxic pond, anaerobic pond, anoxic pond, aerobic tank and the sedimentation basin of pipeline connection；

One end of one water inlet line, the water inlet line is water inlet end, and the other end and the water inlet end of the preposition anoxic pond connect It connects；

One is mounted on the electromagnetic flowmeter for monitoring amount of inlet water on the water inlet line；

The water quality monitoring of the one COD, BOD for monitoring water inlet, ammonia nitrogen and total phosphorus content being mounted on the water inlet line fills It sets；

One is mounted on the first electric check valve on the water inlet line；

One end of one transition conduit, the transition conduit is attempted by the water inlet line and is located at first electric check valve Water inlet end front, the other end connect with the anaerobic pond；

One is mounted on the second electric check valve in the transition conduit；

One end of one first mixed-liquor return pipeline, the first mixed-liquor return pipeline is attempted by the aerobic tank and sedimentation basin Between pipeline on, the other end is attempted by the pipeline between the anaerobic pond and anoxic pond；

One is mounted on the third electric check valve on the first mixed-liquor return pipeline；

One end of one second mixed-liquor return pipeline, the second mixed-liquor return pipeline is attempted by the aerobic tank and sedimentation basin Between pipeline on, the other end is attempted by the pipeline between the preposition anoxic pond and anaerobic pond；

One is mounted on the 4th electric check valve on the second mixed-liquor return pipeline；

One third mixed-liquor return pipeline, one end of the third mixed-liquor return pipeline are attempted by the aerobic tank and sedimentation basin Between pipeline on, the other end is connect with the preposition anoxic pond；

One is mounted on the 5th electric check valve on the third mixed-liquor return pipeline；

One end of one first sludge return pipe, first sludge return pipe is connect with the sludge outlet of the sedimentation basin, Its other end is connect with the preposition anoxic pond；

One is mounted on the 6th electric check valve on first sludge return pipe；

One end of one second sludge return pipe, second sludge return pipe is connect with the sludge outlet of the sedimentation basin, Its other end is connect with the anaerobic pond；

One is mounted on the 7th electric check valve on second sludge return pipe；And

One PLC control system, the PLC control system respectively with the electromagnetic flowmeter, water monitoring device and first, Two, third, the connection of the four, the five, the six, the 7th electric check valves.

2. a kind of sewage disposal system, including sequentially connected coarse rack inlet pumping station, fine fack rotational flow grit chamber, A²O reacts Pond, secondary settling tank, lift pump room, flocculation sedimentation tank, filtering cloth filtering pool and disinfection oxidation pond, which is characterized in that the A²O reaction tanks For the modified form multi-mode operation A adjusted as described in claim 1 based on water quality and quantity²O reaction tanks.

3. sewage disposal system as claimed in claim 2, which is characterized in that heavy with flocculation in the fine fack rotational flow settling pond An overflowing rain water pipe is provided between the pond of shallow lake.