CN110577326A

CN110577326A - But regeneration utilizes industrial waste water's MBR processing apparatus

Info

Publication number: CN110577326A
Application number: CN201910763148.3A
Authority: CN
Inventors: 汤顺良; 乔治·王陶
Original assignee: JIANGSU JIANGHUA WATER TREATMENT EQUIPMENT CO Ltd
Current assignee: JIANGSU JIANGHUA WATER TREATMENT EQUIPMENT CO Ltd
Priority date: 2019-08-19
Filing date: 2019-08-19
Publication date: 2019-12-17
Anticipated expiration: 2039-08-19
Also published as: CN110577326B

Abstract

The invention discloses an MBR (membrane bioreactor) treatment device capable of recycling industrial wastewater, which comprises a water inlet tank, an adjusting tank, an A/O-MBR treatment tank, a clean water tank and an equipment room, wherein the section of the A/O-MBR treatment tank is circular, and the sections of the water inlet tank, the adjusting tank, the A/O-MBR treatment tank, the clean water tank and the equipment room are fan-shaped and surround the outer side of the A/O-MBR treatment tank; the A/O-MBR treatment tank designed by the device organically combines the aerobic tank, the anoxic tank and the MBR membrane tank to form a large whole, so that sewage to be treated can circulate in an aerobic-anaerobic state, and recyclable clear water flows out of the MBR membrane, thus not only saving the occupied area, but also avoiding the problems of insufficient carbon source, nitrate transfer obstacle and the like in the traditional A/O-MBR process by utilizing the circulating mode of the sewage in an aerobic section and an anoxic section, and effectively improving the purification efficiency of the sewage.

Description

But regeneration utilizes industrial waste water's MBR processing apparatus

Technical Field

the invention relates to the technical field of sewage treatment, in particular to an MBR (membrane bioreactor) treatment device capable of recycling industrial wastewater.

Background

The membrane-Bioreactor (MBR) is a novel sewage advanced treatment technology which combines the ultra-filtration membrane separation technology and the micro-filtration membrane separation technology with the traditional activated sludge process, combines the advantages of the membrane separation technology and the biological treatment technology, and utilizes an ultra-micro-filtration membrane component as a mud-water separation unit to completely replace a secondary sedimentation tank. The ultramicro filter membrane intercepts microorganism flocculating constituents and larger molecular organic matters in the activated sludge, so that high biological concentration is obtained in the reactor, the retention time of organic solids is prolonged, and the oxidation rate of the microorganisms to the organic matters is greatly improved. Meanwhile, after being treated by the ultrafiltration membrane and the microfiltration membrane, the effluent quality is high, the system can be directly used for non-drinking water, the system hardly beats residual sludge, and the system has higher impact resistance.

for most industrial sewage, nitrogen removal is needed, the traditional process is to connect an anoxic tank A, an aerobic tank O and an MBR membrane tank in series, organic matters are utilized by denitrifying bacteria in the tank A to reduce a large amount of nitrate nitrogen into nitrogen so as to achieve the purpose of nitrogen removal, and biochemical reactions such as biological oxidation of the organic matters, ammoniation of organic nitrogen and nitrification of ammonia nitrogen are carried out in a subsequent O tank area, so that the purpose of removing pollutants such as organic matters, ammonia nitrogen and the like in the wastewater is achieved, and then the wastewater enters the MBR membrane tank area to be filtered. However, because the oxidation in A pond is not thorough in traditional A/O-MBR technology, probably there is the problem of carbon source not enough, nitrate transfer obstacle, and A pond, O pond set up respectively and can lead to area and whole cost to obviously rise, be unfavorable for industrial application, simultaneously, when the MBR subassembly goes out water filtration, because the reason of flow state, gravity, the quality of water that the filtration membrane of different positions was located is different, can lead to the filtration membrane degree of loss unbalance as of time, reduces holistic availability factor.

Chinese patent CN201520249125.8 discloses an integrated A2O-MBR sewage treatment device, which comprises a filter grid, an A-A2/O biological tank, an MBR biological membrane tank and a disinfection tank provided with a water outlet; the filtering grid is arranged above the A-A2/O biological pool; the A-A2/O biological tank comprises a sludge denitrification tank, an anaerobic tank, an anoxic tank and an aerobic tank which are sequentially communicated, wherein the aerobic tank is communicated with the MBR biological membrane tank; an MBR membrane and an aeration device are arranged in the MBR biological membrane tank; a temperature monitor is arranged on the inner wall of the MBR biological membrane tank; a sludge return pipe is arranged between the MBR biological membrane tank and the sludge denitrification tank, and a return pump is arranged on the sludge return pipe; be provided with the controller, the controller links to each other with temperature monitor, can effectively get rid of organic pollutant water stabilization, but the processing pond of establishing is more in quantity, and overall cost is high and the construction flow is complicated, can't solve the problem that A pond oxidation is not thorough and MBR filtration membrane availability factor is not high simultaneously.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide the MBR treatment device capable of recycling industrial wastewater, which can be used for uniformly treating industrial wastewater and recovering final effluent and has the advantages of small occupied area, low cost and high efficiency.

in order to achieve the purpose, the invention provides the following technical scheme:

an MBR treatment device capable of recycling industrial wastewater comprises a water inlet tank, an adjusting tank, an A/O-MBR treatment tank, a clean water tank and an equipment room, wherein the section of the A/O-MBR treatment tank is circular, and the sections of the water inlet tank, the adjusting tank, the A/O-MBR treatment tank, the clean water tank and the equipment room are fan-shaped and surround the outer side of the A/O-MBR treatment tank; from the overlooking perspective, the whole device is circular, the A/O-MBR treatment tank is taken as the center, and other parts form a larger circle at the periphery, so that the structure is compact, the occupied area is minimized while the treatment capacity is ensured, the distances of all parts are close, the using amount of lines and pipelines can be reduced, and the device is very suitable for the application of small-sized treatment scenes;

the water inlet pool is provided with a grating for filtering solid waste, the grating is fully automatically controlled, large-particle suspended matters and impurities in sewage can be automatically fished, and the treatment of a subsequent process is facilitated;

For most industrial sewage, nitrogen removal is needed, the traditional process is to connect an anoxic tank A, an aerobic tank O and an MBR membrane tank in series, organic matters are utilized by denitrifying bacteria in the tank A to reduce a large amount of nitrate nitrogen into nitrogen so as to achieve the purpose of nitrogen removal, and biochemical reactions such as biological oxidation of the organic matters, ammoniation of organic nitrogen, nitrification of ammonia nitrogen and the like are carried out in a subsequent O tank area so as to achieve the purpose of removing pollutants such as organic matters, ammonia nitrogen and the like in the wastewater, and then the wastewater enters the MBR membrane tank area to be filtered to obtain water, the aerobic tank, the anoxic tank and the MBR membrane tank are organically combined by the A/O-MBR treatment tank designed by the device to form a large whole body, so that the floor area is saved, and the problems of insufficient carbon source, barrier transfer and the like in the traditional A/O-MBR process are avoided by utilizing the circulation mode of the sewage in, effectively improving the purification efficiency of the sewage. The A/O-MBR treatment tank is divided into 4 parts, and comprises an aerobic section, an MBR treatment section, a buffer section and an anoxic section, wherein the aerobic section, the MBR treatment section and the buffer section are sequentially arranged from bottom to top and are communicated with each other;

the aerobic section is provided with an annular aeration pipeline and a fan, the fan adopts a submerged aeration fan, the aeration pipeline adopts a spiral annular pipeline, a plurality of aeration ports are sequentially and uniformly arranged to realize water-gas exchange of the largest area, sludge is arranged at the bottom of the aerobic section, and aerobic bacteria in the sludge can decompose nitrate nitrogen in the sewage to form nitrate due to the existence of the aeration pipeline, so that raw materials are provided for the reaction of the anoxic section;

The MBR treatment section is provided with an MBR filter piece, a rotating assembly and a water outlet pipeline, the MBR filter piece comprises a shell, a plurality of hollow fiber membranes, a water collecting port and a water collecting pipe connected with the water collecting port, one end of each hollow fiber membrane is commonly communicated with the water collecting port, one end of the water collecting pipe is connected with the water collecting port and penetrates through the wall of the A/O-MBR treatment tank, the other end of the water collecting pipe is connected with the water outlet pipeline through the rotating assembly, the rotating assembly can realize the overturning of the filter piece so that the hollow fiber membranes of different parts are arranged at the lower end, the design is that the water level is increased due to the accumulation of sewage in the aeration section and the sludge at the lower part is mixed, in this case, the internal and external osmotic pressures of the hollow fiber membranes at the lower part of the filter piece are higher, the filtration amount is more, the blockage is more likely to occur, the use is not balanced, and the application and replacement cost is increased, so that the hollow fibers are uniformly positioned at the lower side by arranging the rotary piece to rotate at regular time, the utilization rate is improved, and the backwashing can be synchronously carried out during the rotation, so that the cleaning efficiency is improved; one end of the water outlet pipeline is connected with the water collecting pipe, the other end of the water outlet pipeline is externally connected with two passages, one passage is a water purifying passage connected to a clean water tank through a water pump, and the other passage is a cleaning passage externally connected with a backwashing pump; the buffer section is provided with a buffer water outlet leading to the buffer section;

the anoxic section is provided with a baffle plate, the height of the baffle plate is lower than the lowest height of the tank wall of the anoxic section, the baffle plate divides the buffer section into a left part and a right part, and the baffle plate is lower than the lowest height of the tank wall of the buffer section, namely the water level of the left part flows into the left part after reaching a certain height, so that the reaction time in the anoxic process can be prolonged, and the water quality is thoroughly purified; the other side of the baffle is communicated with the aerobic section through a one-way valve, so that the water body is allowed to flow into the aerobic section from the right part, and the water body is not allowed to flow into the right part from the aerobic section, thus the whole sewage forms a whole circulation in the A/O-MBR reaction tank, the aerobic-anaerobic process can be repeatedly carried out, and the purification efficiency is ensured;

The equipment room comprises a central control system and a pump set, wherein the pump set comprises a first water pump for introducing sewage into the regulating tank from the water inlet tank, a second water pump for introducing the sewage into the A/O-MBR treatment tank from the regulating tank, a third water pump for introducing the sewage into the clean water tank from the A/O-MBR treatment tank, and a backwashing pump for cleaning an MBR filter element;

the central control system comprises a water inlet pool control station, an adjusting pool control station, an A/O-MBR treatment pool control station, a clean water pool control station and a communication station, wherein the water inlet pool control station, the adjusting pool control station, the A/O-MBR treatment pool control station and the clean water pool control station are all controlled by a PLC (programmable logic controller), and can be connected to a remote monitoring station through the communication station;

the water inlet pool control station is used for monitoring the water quality and the water level of the water inlet pool and controlling the water inlet flow of the water inlet pool;

the adjusting tank control station is used for monitoring the water level and the water inlet flow rate flowing into the adjusting tank;

the A/O-MBR treatment tank control station is used for monitoring the water level, the aeration state, the MBR filtration state, the sludge backflow state and the effluent quality of the inflow regulating tank;

and the clean water tank control station is used for monitoring the water level and the water quality flowing into the regulating tank.

Preferably, the sludge dewatering device further comprises a sludge dewatering machine, a sludge inlet of the sludge dewatering machine is connected to a water area near an MBR filter element in the A/O-MBR treatment tank through a pipeline, a sludge outlet is connected to an aerobic section and an anoxic section through pipelines respectively, excessive accumulation of sludge in the aerobic section can be caused due to gravity, and sludge in the anoxic section is gradually reduced, so that the sludge near the MBR filter element can be extracted at regular time to be dewatered and concentrated by the aid of the full-automatic sludge dewatering machine and is discharged into the aerobic section and the anoxic section respectively.

preferably, rotating assembly includes the mount pad, runs through the rotation axis that whole MBR filtered piece, rotary joint, and the motor, the mount pad is fixed in on the pool wall of AO-MBR treatment tank to relative rotatable installation rotation axis, the other end of rotation axis run through the pool wall and connect the electrode through rotary joint, the inside of rotation axis is all located to water catch port, collector pipe, outlet conduit is connected to rotary joint's delivery port, utilizes the motor to drive the rotation axis and rotates, thereby drives MBR and filters the piece and rotate, makes the hollow fiber membrane in different regions be located the bottom in proper order, makes MBR filter the piece and obtains make full use of.

Preferably, the grid comprises a 5mm thick grid and a 3mm thin grid;

Preferably, the inside agitator that is equipped with of the great volumetric one side of anoxic zone, in order to guarantee the reaction efficiency in anoxic zone, can set up the agitator and make liquid be the stirring state, fully with silt contact.

preferably, the water purification passage is also provided with an ultraviolet disinfection device, and the ultraviolet disinfection device can be additionally arranged in a water area with standard discharge or serious pollution, so that the finally treated water source can reach the recyclable standard.

preferably, a backwashing medicament device is arranged between the devices, and can be used for carrying out thorough chemical backwashing by using citric acid with the volume concentration of 0.5% or sodium hypochlorite with the volume concentration of 500 mg/L.

Preferably, the sludge contains aerobic bacteria and facultative anaerobic bacteria, and the facultative anaerobic bacteria can simultaneously play a role in degradation in the aerobic section and the anoxic section and can not die.

preferably, the regulating reservoir is provided with a dosing device, and for the phosphorus-containing raw water to be treated, the dosing device needs to be additionally arranged in the regulating reservoir, and aluminum salt or calcium salt is added for precipitation.

compared with the prior art, the invention has the beneficial effects that:

(1) the A/O-MBR treatment tank designed by the device organically combines the aerobic tank, the anoxic tank and the MBR membrane tank to form a large whole, has compact structure and small occupied area, reduces the cost and saves the installation process;

(2) in the A/O-MBR treatment tank, sewage is continuously circulated in an aerobic section and an anoxic section, so that the problems of insufficient carbon source, nitrate transfer obstacle and the like in the traditional A/O-MBR process are solved, and the purification efficiency of the sewage is effectively improved;

(3) In the device, the MBR filter piece is additionally provided with the rotating assembly to realize the rotation of the filter piece, so that the hollow fiber membranes at different positions in the MBR filter piece are sequentially positioned at a place with higher osmotic pressure at the lower part, the integral balanced utilization is realized, the use efficiency of the MBR filter piece is increased, and the cost is saved;

(4) the device adopts an integral circular section, so that the distance between each treatment pool is short, and equipment rooms are arranged, so that water pumps and the like can be uniformly and intensively managed, and the maintenance is convenient; meanwhile, the control system of the device can realize remote monitoring and command through the communication station.

Drawings

FIG. 1 is a schematic top view of the present invention;

FIG. 2 is a schematic structural diagram of an embodiment of the present invention;

FIG. 3 is a schematic diagram of an MBR filter and rotating member according to an embodiment of the present invention.

in the figure, 1-a water inlet pool and 11-a grid; 2-regulating reservoir, 21-dosing device;

3-A/O-MBR treatment tank, 31-aerobic section, 311-aeration pipeline, 312-blower, 32-MBR treatment section, 321-MBR filtration piece, 3211-shell, 3212-hollow fiber membrane, 3213-water collecting port, 3214-water collecting pipe, 322-rotating component, 3221-mounting seat, 3222-rotating shaft, 3223-rotating joint, 3224-motor, 323-water outlet pipeline, 33-buffer section, 331-buffer water outlet, 34-anoxic section, 341-baffle, 342-one-way valve, 343-agitator;

4-a clean water tank; 5-equipment room, 51-pump group, 511-first water pump, 512-second water pump, 513-third water pump, 514-backwashing pump and 52-sludge dewatering machine.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1, an MBR treatment apparatus capable of recycling industrial wastewater includes a water inlet tank 1, an adjusting tank 2, an a/O-MBR treatment tank 3, a clean water tank 4, and an equipment room 5, wherein the cross section of the a/O-MBR treatment tank 3 is in an original shape, and the cross sections of the water inlet tank 1, the adjusting tank 2, the a/O-MBR treatment tank 3, the clean water tank 4, and the equipment room 5 are in fan-ring shapes and surround the outside of the a/O-MBR treatment tank 3; from the overlooking perspective, the whole device is circular, the A/O-MBR treatment tank 3 is taken as the center, and other parts form a larger circle at the periphery, so that the structure is compact, the floor area is minimized while the treatment capacity is ensured, the distances of all parts are close, the using amount of lines and pipelines can be reduced, and the device is very suitable for application in small-sized treatment scenes;

Referring to fig. 2, the water inlet tank 1 is provided with a grating 11 for filtering solid waste, and the grating 11 is fully automatically controlled, and comprises a coarse grating of 5mm and a fine grating of 3mm, so that large-particle suspended matters and impurities in sewage can be automatically fished out, and the treatment of a subsequent process is facilitated;

The regulating reservoir 2 mainly has the function of coping with the flexible change of sewage flow, and simultaneously carries out pretreatment according to the raw water of different batches by adding medicaments, so the regulating reservoir 2 is also provided with a full-automatic dosing device 21 for adding aluminum salt to precipitate phosphorus in the raw water.

Referring to fig. 2, the a/O-MBR treatment tank 3 is divided into 4 parts, including an aerobic section 31, an MBR treatment section 32, a buffer section 33, and an anoxic section 34, where the aerobic section 31, the MBR treatment section 32, and the buffer section 33 are sequentially disposed from bottom to top and are communicated with each other, the overall layout is similar to a lamppost structure, the diameters of the aerobic section 31 and the buffer section 33 are relatively large to obtain a relatively large gas-liquid contact area, the diameter of the MBR treatment section 32 is relatively short to facilitate water level rise, and the anoxic section 34 is disposed at a side surface of the buffer section 33 and is located in an independent space; the A/O-MBR treatment tank 3 designed by the device organically combines the aerobic tank, the anoxic tank and the MBR membrane tank to form a large whole, not only saves the occupied area, but also avoids the problems of insufficient carbon source, nitrate transfer obstacle and the like in the traditional A/O-MBR process by utilizing the circulating mode of sewage in the aerobic section and the anoxic section, and effectively improves the purification efficiency of sewage.

the aerobic section 31 is provided with an annular aeration pipeline 311 and a fan 312, the fan 312 adopts a submerged aeration fan, the aeration pipeline 311 adopts a spiral annular pipeline, a plurality of aeration ports are sequentially and uniformly formed to realize water-gas exchange of the largest area, the bottom of the aerobic section 31 is provided with sludge, the sludge contains aerobic bacteria and facultative anaerobic bacteria, and the facultative anaerobic bacteria can simultaneously perform degradation in the aerobic section 31 and the anoxic section 34 and can not die; due to the existence of the aeration pipeline 311, the sewage is in an oxygen-rich state, and the aerobic bacteria in the sludge can decompose nitrate nitrogen in the sewage to form nitrate so as to provide raw materials for the reaction of the anoxic section 34.

referring to fig. 3, the MBR treatment section 32 is provided with an MBR filtration member 321, a rotation member 322, and a water outlet pipe 323, wherein the MBR filtration member 321 includes an outer shell 3211, a plurality of hollow fiber membranes 3212, a water collection port 3213, and a water collection pipe 3214 connected to the water collection port 3213, one end of the water collection pipe 3214 is connected to the water collection port 3213 and penetrates through a tank wall of the a/O-MBR treatment tank, the other end of the water collection pipe 3214 is connected to the water outlet pipe 323 through the rotation member 322, the rotation member 322 is capable of turning over the filtration member 321 so as to locate different parts of the hollow fiber membranes 3212 at a lower end, the rotation member 322 includes an MBR mounting seat 3221, a rotation shaft 3222 penetrating through the whole filtration member 321, a rotation joint 3223, and a motor 3224, the mounting seat 3221 is fixed to the tank wall of the a/O-MBR treatment tank, and relatively rotatably mounts the rotation shaft 3222, the other end of the rotating shaft 3222 penetrates through the wall of the tank and is connected with an electrode 3224 through a rotating joint 3223, the water collecting port and the water collecting pipe are both arranged inside the rotating shaft 3222, a water outlet of the rotating joint 3223 is connected with the water outlet pipeline 323, and the rotating shaft 3222 is driven to rotate by the motor 3224, so that the MBR filter element is driven to rotate, the hollow fiber membranes 3212 in different areas are sequentially positioned at the bottom, and the MBR filter element 321 is fully utilized;

the reason for such design is that the water level of the sewage is raised due to accumulation by the aeration section 31 and the sewage is mixed with the sludge at the lower part, in this case, the internal and external osmotic pressures of the hollow fiber membrane 3212 at the lower part of the filtering member 321 are higher, the filtering amount is more, the blockage is more easily caused, while the internal and external osmotic pressures at the upper side are lower due to the gravity, the use is very unbalanced, and the cost of application and replacement is increased, so the hollow fiber 3212 is uniformly positioned at the lower side by setting the rotating member 321 to rotate regularly, the utilization rate is improved, and the synchronous backwashing can be performed during the rotation, and the cleaning efficiency is improved; one end of the water outlet pipeline 323 is connected with the water collecting pipe 3214, and the other end is externally connected with two passages, namely a water purifying passage connected to the clean water tank 4 through a water pump and a cleaning passage externally connected with a backwashing pump; the buffer section 33 is provided with a buffer water outlet 331 leading to the buffer section 33.

The anoxic section 34 is provided with a baffle 341, the height of the baffle 341 is lower than the lowest height of the tank wall of the anoxic section 33, the baffle 341 divides the buffer section 33 into a left part and a right part, and the baffle 341 is lower than the lowest height of the tank wall of the buffer section 33, namely the water level of the left part flows into the part after reaching a certain height, so that the reaction time of the anoxic process can be prolonged, and the water quality is thoroughly purified; a stirrer 343 is arranged in the left part of the anoxic section 34, and in order to ensure the reaction efficiency of the anoxic section 34, the stirrer 343 can be arranged to ensure that the liquid is in a stirring state and is fully contacted with the sludge; the other side of the baffle 341 is communicated with the aerobic section 31 through the one-way valve 342, so that the water body is allowed to flow into the aerobic section 31 from the right part, and the water body is not allowed to flow into the right part from the aerobic section 31, thus the whole sewage forms an integral circulation in the A/O-MBR reaction tank, the aerobic-anaerobic process can be repeatedly carried out, and the purification efficiency is ensured;

the equipment room 5 comprises a central control system, a pump set 51, a sludge dewatering machine 52, an ultraviolet disinfection device 53 and a backwashing medicament device 54, wherein the water pump set 51 comprises a first water pump 511 for introducing sewage from the water inlet tank 1 into the regulating tank 2, a second water pump 512 for introducing sewage from the regulating tank 2 into the A/O-MBR treatment tank 3, a third water pump 513 for introducing sewage from the A/O-MBR treatment tank 3 into the clean water tank 4 and a backwashing pump 514 for carrying out MBR filtration 321; the sludge inlet of the sludge dewatering machine 52 is connected to the water area near the MBR filter 321 in the A/O-MBR treatment tank 3 through a pipeline, the sludge outlet is connected to the aerobic section 31 and the anoxic section 34 through pipelines respectively, and due to gravity, the sludge can be excessively accumulated in the aerobic section 31 and gradually reduced in the anoxic section 34, so that the sludge near the MBR filter 321 can be periodically extracted by the full-automatic sludge dewatering machine 52 to be dewatered and concentrated and is discharged into the aerobic section 31 and the anoxic section 34 respectively; the ultraviolet disinfection device 53 is arranged on the last purified water passage and is the last step of treatment in the clean water tank; in order to clean the MBR filter 321 thoroughly and regularly, a backwashing medicament device 54 is additionally arranged, and can perform thorough chemical backwashing by using citric acid with the volume concentration of 0.5% or sodium hypochlorite with the volume concentration of 500 mg/L.

The central control system comprises a water inlet pool control station, an adjusting pool control station, an A/O-MBR treatment pool control station, a clean water pool control station and a communication station, wherein the water inlet pool control station, the adjusting pool control station, the A/O-MBR treatment pool control station and the clean water pool control station are all controlled by PLC and can be connected to a remote monitoring station through the communication station, so that remote control can be realized, and the labor cost is reduced;

The water inlet pool control station is used for monitoring the water quality and the water level of the water inlet pool 1 and controlling the water inlet flow of the water inlet pool 1;

the regulating reservoir control station is used for monitoring the water level flowing into the regulating reservoir 2 and controlling the inflow and the opening of the overflow valve;

the A/O-MBR treatment tank control station is used for monitoring the water level, the aeration state, the MBR filtration state, the sludge backflow state and the effluent quality of the inflow regulating tank 2;

The clean water tank control station is used for monitoring the water level and the water quality flowing into the regulating tank 2.

the sewage treatment process flow comprises the following steps:

firstly, sewage flows through a water inlet tank 1 and a mechanical grid, and the mechanical grid automatically drags out large-particle suspended matters and impurities in the sewage;

secondly, the sewage treated in the first step flows into an adjusting tank 2, the water quality and the water quantity are adjusted in the adjusting tank, aluminum chloride is added to remove phosphorus in the sewage, and the sewage treated by the adjusting tank is conveyed to an A/O-MBR adjusting tank 3 by a water pump;

Thirdly, sewage entering the A/O-MBR regulating tank 3 firstly enters an aerobic section 31 at the bottom of the tank, is aerated by an aeration device, and is subjected to primary nitro-nitrogen degradation by aerobic bacteria in sludge to generate a next-step degraded reactant nitrate and a carbon source; then the water level gradually rises, oxygen passing through the buffer section 33 is naturally emitted, the oxygen enters the anoxic section 34, facultative anaerobes in sludge in the anoxic section 34 perform denitrification on nitrate and organic carbon sources in the inlet water, NO 2-and NO 3-in the inlet water are reduced into N2 to achieve denitrification, the ammonia nitrogen value is degraded while organic matters are removed, and meanwhile, the oxygen flows back to the aerobic section 31 through a one-way valve to form complete circulation;

fourthly, when sewage in the A/O-MBR regulating tank 3 flows through the MBR filter piece 321 in the circulation process, the sewage passes through the hollow fiber membrane under the action of the third water pump, is uniformly delivered to the water purifying passage from the water collecting port, and is finally gathered in the water purifying tank after being sterilized by the ultraviolet sterilizing device for recycling; meanwhile, the MBR filter 321 performs rotation and backwashing at regular time to ensure efficient purified water.

example of water purification:

the indexes of wastewater of a certain factory in Shaanxi are shown in Table 2, the wastewater is treated and recovered by using the device disclosed by the invention, the sizes and the retention time of all parts are shown in Table 1, after the wastewater is stably operated for half a year, the average effluent quality can be shown in Table 2, the wastewater completely reaches the discharge standard, and the wastewater can be recycled for greening irrigation and toilet flushing, so that the current environment-friendly requirements are met.

TABLE 1 treatment tank size and residence time

TABLE 2 Water quality of influent and effluent before and after treatment

Claims

1. The utility model provides a but MBR processing apparatus of regeneration utilization industrial waste water which characterized in that: the device comprises a water inlet pool (1), an adjusting pool (2), an A/O-MBR treatment pool (3), a clean water pool (4) and an equipment room (5), wherein the section of the A/O-MBR treatment pool (3) is circular, and the sections of the water inlet pool (1), the adjusting pool (2), the A/O-MBR treatment pool (3), the clean water pool (4) and the equipment room (5) are fan-shaped and surround the outer side of the A/O-MBR treatment pool (3);

The water inlet pool (1) is provided with a grating (11) for filtering solid waste;

the A/O-MBR treatment tank (3) is divided into 4 parts, and comprises an aerobic section (31), an MBR treatment section (32), a buffer section (33) and an anoxic section (34), wherein the aerobic section (31), the MBR treatment section (32) and the buffer section (33) are sequentially arranged from bottom to top and are communicated with each other, and the anoxic section (34) is arranged on the side surface of the buffer section (33) and is positioned in an independent space;

The aerobic section (31) is provided with an annular aeration pipeline (311) and a fan (312), and sludge is arranged at the bottom of the aerobic section (31);

the MBR treatment section (32) is provided with an MBR filter piece (321), a rotating assembly (322) and a water outlet pipeline (323), the MBR filter piece (321) comprises a shell (3211), a plurality of hollow fiber membranes (3212), a water collecting port (3213) and a water collecting pipe (3214), one end of the water collecting pipe (3214) is connected with the water collecting port (3213) and penetrates through the wall of the A/O-MBR treatment tank (3), the other end of the water collecting pipe (3214) is connected with the water outlet pipeline (323) through the rotating assembly (322), the rotating assembly (322) can realize the rotation of the MBR filter piece (321) so as to enable the hollow fiber membranes (3212) of different parts to be positioned at the lower end, the water outlet pipeline (323) is externally connected with two passages, one passage is connected to the clean water tank (4) through a water pump, and the other passage is a cleaning passage for backwashing the water purification MBR filter; the buffer section (33) is provided with a buffer water outlet (331) leading to the buffer section (33);

The anoxic section (34) is provided with a baffle (341), the height of the baffle (341) is lower than the lowest height of the tank wall, and the other side of the baffle (341) is communicated with the aerobic section (31) through a one-way valve (342);

The equipment room (5) comprises a central control system and a pump set (51), wherein the water pump set (51) comprises a first water pump (511) for introducing sewage into the regulating reservoir (2) from the water inlet reservoir (1), a second water pump (512) for introducing the sewage into the A/O-MBR treatment reservoir (3) from the regulating reservoir (2), a third water pump (513) for introducing the sewage into the clean water reservoir (4) from the A/O-MBR treatment reservoir (3), and a backwashing pump (514) for cleaning an MBR filter (321);

the water inlet pool control station is used for monitoring the water quality, the water level, the water inlet flow and the overturning state of the grating (11) of the water inlet pool (1);

The regulating reservoir control station is used for monitoring the water level and the water inlet flow rate flowing into the regulating reservoir (2);

The A/O-MBR treatment tank control station is used for monitoring the water level, the aeration state, the MBR filtration state and the effluent quality of the inflow A/O-MBR treatment tank (3);

The clean water tank control station is used for monitoring the water level and the water quality of the clean water tank (5).

2. The MBR treatment device for recycling industrial wastewater according to claim 1, wherein: the equipment room (5) also comprises a sludge dewatering machine (52), the sludge inlet of the sludge dewatering machine (52) is connected to the water area near the MBR filter piece (321) in the A/O-MBR treatment tank (3) through a pipeline, and the sludge outlet is respectively connected to the aerobic section (31) and the anoxic section (34) through pipelines.

3. The MBR treatment device for recycling industrial wastewater according to claim 1, wherein: the rotating assembly (322) comprises an installation seat (3221), a rotating shaft (3222) penetrating through the whole MBR filter piece (321), a rotating joint (3223) and a motor (3224), the installation seat (3221) is fixed on the wall of the A/O-MBR treatment tank (3) and relatively rotatably supports the rotating shaft (3222), the other end of the rotating shaft (3222) penetrates through the wall of the tank and is connected with the motor (3224) through the rotating joint (3223), the water collecting port (3213) and the water collecting pipe (3214) are both arranged inside the rotating shaft (3222), and a water outlet of the rotating joint (3223) is connected with the water outlet pipeline (323).

4. the MBR treatment device for recycling industrial wastewater according to claim 1, wherein: the grids (11) comprise a 5mm thick grid and a 3mm thin grid.

5. The MBR treatment device for recycling industrial wastewater according to claim 1, wherein: a stirrer (343) is arranged in one side of the anoxic section (34) with larger volume.

6. The MBR treatment device for recycling industrial wastewater according to claim 1, wherein: an ultraviolet disinfection device (52) is also arranged on the water purification passage.

7. The MBR treatment device for recycling industrial wastewater according to claim 1, wherein: and a backwashing medicament device (54) is also arranged between the devices, and the backwashing medicament device (54) is connected with a backwashing pump (514).

8. The MBR treatment device for recycling industrial wastewater according to claim 1, wherein: the sludge contains aerobic bacteria and facultative anaerobic bacteria.

9. The MBR treatment device for recycling industrial wastewater according to claim 1, wherein: the adjusting tank (2) is provided with a dosing device (21).