CN211445222U - Device for reducing pollution of plate-type ceramic membrane of anaerobic membrane bioreactor - Google Patents
Device for reducing pollution of plate-type ceramic membrane of anaerobic membrane bioreactor Download PDFInfo
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Abstract
The utility model discloses a device for reducing the pollution of a plate-type ceramic membrane of an anaerobic membrane bioreactor, which comprises an anaerobic bioreactor and an anaerobic membrane separation system, wherein the anaerobic bioreactor is connected with the anaerobic membrane separation system through a water outlet pipe; the anaerobic membrane separation system comprises a water inlet device, an anaerobic membrane separation device, a reflux device and a water outlet device, wherein the water inlet device is arranged at the bottom of the anaerobic membrane separation device, and the water outlet device is arranged at the top of the anaerobic membrane separation device; one end of the reflux device is connected with the top end of the anaerobic membrane separation device, and the other end of the reflux device is arranged at the bottom end of the anaerobic membrane separation device. The utility model discloses combine together anaerobism bioreactor and the anaerobism membrane separator of built-in board-like ceramic membrane subassembly to handle high concentration organic waste water, utilize water-locator and guide plate in the anaerobism membrane separator to form quick circulation hydraulic shear washing between ceramic diaphragm plate simultaneously, combine compound biological carrier machinery to clean the membrane surface to the back flush of cooperation effectively reduces the membrane pollution.
Description
Technical Field
The utility model relates to the technical field of sewage treatment equipment, in particular to a device for reducing pollution of a plate-type ceramic membrane of an anaerobic membrane bioreactor.
Background
A Membrane Bioreactor (MBR) is a novel sewage treatment process combining Membrane separation and traditional sewage biological treatment technology, and is mainly characterized in that a Membrane module is used for filtering to replace a secondary sedimentation tank in a conventional activated sludge method, so that sludge-water separation and sludge concentration are realized. The membrane bioreactor is divided into an aerobic membrane bioreactor and an anaerobic membrane bioreactor according to whether the aerobic membrane is aerobic or not, and is divided into a split type membrane bioreactor and an integrated type membrane bioreactor according to different arrangement positions of membrane components.
Compared with the traditional aerobic process, the anaerobic process has the advantages of less sludge yield, low energy consumption, capability of generating energy source gas methane and the like, and is widely applied to the treatment of high-concentration organic wastewater. The split type membrane bioreactor runs relatively stably, and because the reactor and the membrane module are respectively arranged in the two treatment units, the membrane module is easy to clean and replace, and meanwhile, the stable running of an anaerobic system cannot be damaged.
The split Anaerobic Membrane Bioreactor (rAnMBR) is a novel high-efficiency reactor combining a Membrane separation technology and an Anaerobic biological treatment technology, has the treatment advantages of Anaerobic reaction and the interception effect of a Membrane component to ensure the sludge concentration and realize sludge-water separation, has the characteristics of high sludge concentration, high volume load, high organic matter removal rate, less sludge production and the like, and is widely applied to the field of high-concentration industrial wastewater at present.
At present, the traditional anaerobic membrane bioreactor mainly adopts an imported tubular membrane component, the membrane material is a macromolecular organic matter, and the membrane aperture is about 200 nm. The whole reaction system is in a closed state, sewage/sludge flows in a cross flow manner to scour the surface of the membrane, and transmembrane pressure difference is reduced by matching with water backwashing. However, the organic membrane has poor mechanical strength, so that the membrane surface is easily damaged in the backwashing and scouring process, and the service life of the membrane component is influenced.
As a recently emerging sewage treatment separation material, the ceramic membrane has the advantages of high mechanical strength, strong rigidity, uniform membrane aperture, strong corrosion resistance and the like compared with an organic membrane. The ceramic membrane has good applicability to extreme treatment environment, and is combined with an anaerobic process, so that the feasibility and the operation effect of treating high-concentration organic wastewater are ensured. However, in the actual operation process, the problem of membrane pollution is still a key factor limiting the application and popularization of the anaerobic ceramic membrane bioreactor.
The anaerobic membrane bioreactor which is industrially applied at present is mainly a tubular organic membrane, and the cleaning mode mainly adopts tangential hydraulic shearing and is matched with online water backwashing, online medicine washing and the like. The water yield of the tangential hydraulic shearing is 8-15 times of the water yield, and the overflowing water cannot contain hard inorganic matters so as to avoid mechanical damage to the surface of the membrane. In the traditional anaerobic bioreactor, a three-phase separator is used for separating gas, liquid and solid phases, the solid-liquid separation effect in actual engineering is not ideal, the phenomena of difficult sludge concentration maintenance, incomplete sludge-water separation and serious sludge loss of an anaerobic system exist, and the anaerobic treatment efficiency is seriously influenced.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a device for reducing the pollution of a plate-type ceramic membrane of an anaerobic membrane bioreactor, thereby solving the problems in the prior art.
In order to realize the purpose, the utility model discloses a technical scheme as follows:
a device for reducing plate-type ceramic membrane pollution of an anaerobic membrane bioreactor comprises an anaerobic bioreactor and an anaerobic membrane separation system, wherein the anaerobic bioreactor is connected with the anaerobic membrane separation system through a water outlet pipe;
the anaerobic membrane separation system comprises a water inlet device, an anaerobic membrane separation device, a reflux device and a water outlet device, wherein the water inlet device is arranged at the bottom of the anaerobic membrane separation device, and the water outlet device is arranged at the top of the anaerobic membrane separation device; one end of the reflux device is connected to the top end of the anaerobic membrane separation device, and the other end of the reflux device is arranged at the bottom end of the anaerobic membrane separation device.
Preferably, the anaerobic membrane separation device comprises a composite biological carrier, a flat ceramic module and a flow guide plate, wherein the composite biological carrier is dispersed around the flat ceramic module, and the flow guide plate is arranged at the top end of the anaerobic membrane separation device;
the density of the composite biological carrier is 0.95-0.98 g/cm3Hydrophilic organic or inorganic materials, irregular geometric materials.
Preferably, the water inlet device comprises a water inlet distributor, an inclined plate and an interception net, and the water inlet distributor, the inclined plate and the interception net are sequentially arranged at the bottom of the anaerobic membrane separation device.
Preferably, the water outlet device comprises a membrane module water production pump and a water collection pipe, the water collection pipe is connected with a flat ceramic membrane module in the anaerobic membrane separation device, the other end of the water collection pipe is connected with a clean water tank, and the membrane module water production pump is arranged on the water collection pipe.
Preferably, the water outlet device further comprises a membrane group water production regulating valve, a membrane group water production flow meter and a vacuum meter, wherein the flow meter, the membrane group water production regulating valve and the vacuum meter are arranged on the water collecting pipe, and the vacuum meter is arranged in front of the membrane group water production pump.
Preferably, a backwashing water pipe is further arranged between the water outlet device vacuum meter and the membrane component water production regulating valve, the backwashing water pipe is connected with the clean water tank, and a backwashing pump and a backwashing valve are arranged on the backwashing water pipe.
Preferably, the reflux device comprises a mixed liquid reflux pump, a reflux pipe and a reflux water distributor, the mixed liquid reflux pump is arranged on the reflux pipe, and the reflux water distributor is connected to one end of the reflux pipe and arranged at the bottom of the anaerobic membrane separation device.
Preferably, the backflow device further comprises a backflow regulating valve and a backflow flowmeter, and the backflow regulating valve and the backflow flowmeter are sequentially arranged on the backflow pipe.
Preferably, the device for reducing the plate-type ceramic membrane pollution of the anaerobic membrane bioreactor further comprises a gas collecting pipe, and the gas collecting pipe is respectively connected with the top gas chamber of the anaerobic bioreactor and the top gas chamber of the anaerobic membrane separation device.
Preferably, the device for reducing pollution of the plate-type ceramic membrane of the anaerobic membrane bioreactor further comprises a sludge discharge device, the sludge discharge device returns sludge generated by the anaerobic membrane separation system to the anaerobic bioreactor, the sludge discharge device comprises a sludge discharge pipe and a sludge discharge reflux pump, the sludge discharge pipe is arranged at the lower end of the water inlet distributor, and the sludge discharge reflux pump is arranged between the sludge discharge pipe and the anaerobic bioreactor.
Preferably, the device for reducing the pollution of the plate-type ceramic membrane of the anaerobic membrane bioreactor further comprises a sludge baffle plate, and the sludge baffle plate is used for guiding the sludge generated by the anaerobic membrane separation device.
The utility model discloses have following characteristics in design and structure:
1) the top in the anaerobic membrane separation device of the utility model is provided with a plurality of groups of guide plates which are matched with the reflux water distribution pipe, so that sewage to be treated can form rapid circulation between the membrane plates, and the liquid flow speed on the membrane surface is increased by hydraulic shearing;
2) the anaerobic membrane separation device of the utility model is provided with mixed liquid reflux and a reflux water distribution pipe, under the flow state distribution and strengthening action of the mixed liquid, the fluid forms rapid circulation hydraulic shear between plates, and the pollution on the surface of a flat ceramic membrane is scrubbed by driving a composite biological carrier machine and the fouling of a membrane component in a membrane separation reactor is prevented or delayed by matching with water back flushing;
3) the utility model discloses pack a density among the device anaerobic membrane separator and be 0.95 ~ 0.98g/cm3The composite biological carrier with hydrophilic organic or inorganic material and irregular geometric shape can be used as a scrubbing material on the surface of the ceramic membrane, and meanwhile, provides an attachment place for microorganisms in the anaerobic membrane separation device, and improves the sludge concentration; adding the composite biological carrier at a certain adding ratioAnd the water flows between the plates rapidly along with the water flow, and attachments on the surface of the membrane are wiped and cleaned through cross flow with the surface of the ceramic membrane, so that the membrane pollution is effectively reduced, and the service life of the anaerobic ceramic membrane is prolonged.
4) The top air chamber of the anaerobic bioreactor is communicated with the top air chamber of the membrane separation device through an air duct, which is beneficial to the release and collection of methane in the whole system.
5) The utility model discloses the device is except having the membrane separation function, and the bioreaction function in addition, thereby the microorganism is attached to compound biological carrier and ceramic membrane surface and is formed the biomembrane, decomposes the pollutant in the aquatic.
6) The microorganisms intercepted by the membrane separation device return to the anaerobic bioreactor in a sludge backflow mode, so that the separation of hydraulic retention time and sludge retention time is realized, the sludge concentration in the anaerobic bioreactor can be improved by 5-10%, and the impact load resistance of the system is improved by 10-15%.
The utility model discloses an effectively reduce device that anaerobic membrane bioreactor plate-type ceramic membrane pollutes, the beneficial effect of realization includes:
(1) the utility model discloses sludge concentration keeps difficulty, mud-water separation is incomplete, the serious phenomenon of anaerobic system mud loss among the organic waste water anaerobic treatment, is applied to board-like ceramic membrane among the anaerobic reaction system to constitute an anaerobic membrane separator, through water backwash, the quick circulation between board is cuted and is washd and compound bio-carrier's mechanical friction, and combine water backwash mode to reduce to pass membrane pressure differential, reduce membrane pollution and maintain membrane flux, reduce membrane pollution.
(2) The utility model discloses sludge concentration is higher in the anaerobic membrane separator in the device, goes into anaerobic bioreactor by the backward flow of anaerobic membrane separator, improves anaerobic bioreactor sludge concentration, has better treatment effect for traditional anaerobic bioreactor extrinsic cycle to can improve anaerobic bioreactor's treatment effeciency, promote out water quality of water.
(3) Under the flow state distribution and strengthening action of the reflux water distribution pipe and the guide plate, the fluid in the anaerobic membrane separation device forms quick circulation hydraulic shear between plates, and the pollution blocking phenomenon of a membrane component in the membrane separation reactor is prevented or delayed by driving the composite biological carrier to mechanically scrub pollutants on the surface of the flat ceramic membrane and matching with water backwashing.
(4) The utility model discloses put the operation with anaerobism bioreactor and membrane module branch, can effectively reduce the absorption and the deposit of mud on the membrane surface in the anaerobism bioreactor, when effectively alleviating the membrane pollution, improved anaerobism bioreactor's treatment effeciency and play water quality of water.
(5) The utility model discloses pack a density among the device anaerobic membrane separator and be 0.95 ~ 0.98g/cm3The composite biological carrier with hydrophilic organic or inorganic material and irregular geometric shape can be used as a scrubbing material on the surface of the ceramic membrane, and provides an attachment place for microorganisms in the anaerobic membrane separation device to improve the sludge concentration. The composite biological carrier flows rapidly between the plates along with water flow at a certain adding ratio, and the attachments on the surface of the membrane are cleaned by cross flow scrubbing with the surface of the ceramic membrane, so that the membrane pollution is effectively reduced, and the service life of the anaerobic ceramic membrane is prolonged.
Drawings
FIG. 1 is a schematic diagram of the apparatus for reducing plate-type ceramic membrane fouling in an anaerobic membrane bioreactor in example 1;
FIG. 2 is a schematic diagram of the apparatus for reducing plate-type ceramic membrane fouling in an anaerobic membrane bioreactor in example 2;
1-anaerobic bioreactor water inlet pump; 2-anaerobic bioreactor water distributor; 3-anaerobic bioreactor effluent regulating valve; 4-a flowmeter of a water outlet pipe of the anaerobic bioreactor; 5-water inlet distributor of anaerobic membrane separation device; 6-sloping plate; 7-a retention net; 8-anaerobic membrane separation device; 9-flat ceramic membrane group; 10-a complex biological carrier; 11-a flow guide plate; 12-vacuum gauge; 13-membrane group water pump; 14-membrane group produced water regulating valve; 15-a water production flow meter; 16-mixed liquor reflux pump; 17-a reflux regulating valve; 18-a reflux flow meter; 19-reflux water distributor; 20-a sludge discharge pipe; 21-sludge discharge reflux pump; 22-sludge reflux adjusting valve; 23-a flow meter; 24-pressure gauge; 25-a thermometer; 26-a pH meter; 27-an exhaust pipe; 28-sludge baffle; 29-clean water pool; 30-backwash pump; 31-backwash regulating valve.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the invention, are given by way of illustration only.
Example 1
The embodiment provides a device for reducing plate-type ceramic membrane pollution of an anaerobic membrane bioreactor, which comprises an anaerobic bioreactor and an anaerobic membrane separation system which are separated from each other, wherein the anaerobic bioreactor is connected with the anaerobic membrane separation system through a water outlet pipe; the water outlet pipe is provided with an anaerobic bioreactor water outlet regulating valve and an anaerobic bioreactor water outlet flow meter; the water inflow of the anaerobic bioreactor entering the anaerobic membrane separation system can be adjusted.
The anaerobic membrane separation system comprises a water inlet device, an anaerobic membrane separation device, a reflux device and a water outlet device, wherein the water inlet device is arranged at the bottom of the anaerobic membrane separation device, and the water outlet device is arranged at the top of the anaerobic membrane separation device; one end of the reflux device is connected to the top end of the anaerobic membrane separation device, and the other end of the reflux device is arranged at the bottom end of the anaerobic membrane separation device.
The outer wall of the anaerobic membrane separation device is provided with a heat insulation material, and the operating temperature of the anaerobic ceramic membrane separation device is controlled to be 35-38 ℃.
The anaerobic membrane separation device comprises a composite biological carrier, a flat ceramic module and a guide plate, wherein the composite biological carrier is arranged around the flat ceramic module, and the guide plate is arranged at the top end of the anaerobic membrane separation device.
The bio-carrier in the embodiment is a bio-carrier with a density of 0.95-0.98 g/cm3The composite biological carrier with hydrophilic organic or inorganic material and irregular geometric shape can be used as a scrubbing material on the surface of the ceramic membrane, provides an attachment place for microorganisms in the anaerobic membrane separation device, improves the sludge concentration, and rapidly flows between plates along with water flow under a certain adding ratio and passes through the plate and the plateThe cross flow on the surface of the ceramic membrane is scrubbed to remove attachments on the surface of the membrane, so that the membrane pollution is effectively reduced, and the service life of the anaerobic ceramic membrane is prolonged.
The water inlet device comprises a water inlet distributor, an inclined plate and an interception net, and the water inlet distributor, the inclined plate and the interception net are sequentially arranged at the bottom of the anaerobic membrane separation device.
Go out water installation and include reactor play water governing valve, product water flowmeter, vacuum table, membrane group product water pump and collector pipe, the one end of collector pipe links to each other with dull and stereotyped ceramic membrane group in the anaerobic membrane bioreactor, and the other end links to each other with the clean water basin, the membrane group product water pump the flowmeter reactor play water governing valve with the vacuum table all sets up on the collector pipe, the vacuum table sets up before the membrane group product water pump.
In order to clean the membrane group in the anaerobic membrane separation device, the upper end of the flat ceramic membrane group is connected with a backwashing device, the backwashing device comprises a backwashing water pipe, a backwashing pump and a backwashing regulating valve, one end of the backwashing water pipe is connected between a vacuum meter of the water collecting pipe and the reactor water outlet regulating valve, and the other end of the backwashing water pipe is connected with a clean water tank.
The reflux unit comprises a mixed liquid reflux pump, a reflux regulating valve, a reflux flowmeter, a reflux pipe and a reflux water distributor, wherein the mixed liquid reflux pump is arranged on the reflux pipe, the reflux water distributor is connected with one end of the reflux pipe and arranged at the bottom of the anaerobic membrane separation device, and the reflux regulating valve and the reflux flowmeter are sequentially arranged on the reflux pipe.
In this embodiment, the device for reducing plate-type ceramic membrane pollution of the anaerobic membrane bioreactor further comprises a gas collecting pipe, and the gas collecting pipe is respectively connected with the top gas chamber of the anaerobic bioreactor and the top gas chamber of the membrane separation device.
Reduce the device that anaerobic membrane bioreactor plate-type ceramic membrane pollutes still includes sludge discharging equipment in this embodiment, sludge discharging equipment flows back the mud that anaerobic membrane separator produced extremely anaerobic bioreactor, sludge discharging equipment includes row's mud pipe and row's mud backwash pump, row's mud pipe sets up the lower extreme at the water distributor of intaking, row's mud backwash pump sets up arrange the mud pipe with between the anaerobic bioreactor, the mud of water distributor below will intaking by the suction pump sending to anaerobic reactor by the suction of row's mud backwash pump, forms the backward flow of anaerobic sludge.
Example 2
The embodiment discloses a device for reducing pollution of a plate-type ceramic membrane of an anaerobic membrane bioreactor, which comprises an integrated anaerobic bioreactor and an anaerobic membrane separation system, as shown in figure 2. The anaerobic bioreactor is connected with the anaerobic membrane separation system through a water outlet pipe; the water outlet pipe is arranged in the anaerobic bioreactor, and the water outlet pipe is not provided with an adjusting valve and a flowmeter, so that the water inlet quantity entering the anaerobic membrane separation system cannot be adjusted, and only water can be continuously fed.
The anaerobic membrane separation system has the same structure as that in the embodiment 1, and comprises a water inlet device, an anaerobic membrane separation device, a reflux device and a water outlet device, wherein the water inlet device is arranged at the bottom of the anaerobic membrane separation device, and the water outlet device is arranged at the top of the anaerobic membrane separation device; one end of the reflux device is connected to the top end of the anaerobic membrane separation device, and the other end of the reflux device is arranged at the bottom end of the anaerobic membrane separation device.
The outer wall of the anaerobic membrane separation device is provided with a heat insulation material, and the operating temperature of the anaerobic ceramic membrane separation device is controlled to be 35-38 ℃.
The anaerobic membrane separation device comprises a composite biological carrier, a flat ceramic module and a guide plate, wherein the composite biological carrier is arranged around the flat ceramic module, and the guide plate is arranged at the top end of the anaerobic membrane separation device.
The bio-carrier in the embodiment is a bio-carrier with a density of 0.95-0.98 g/cm3The composite biological carrier with hydrophilic organic or inorganic material and irregular geometric shape can be used as a scrubbing material on the surface of the ceramic membrane, provides an attachment place for microorganisms in the anaerobic membrane separation device, improves the sludge concentration, rapidly flows between plates along with water flow under a certain adding ratio, and passes through the ceramic membrane surfaceThe attachment on the surface of the membrane is cleaned by cross flow scrubbing, so that the membrane pollution is effectively reduced, and the service life of the anaerobic ceramic membrane is prolonged.
The water inlet device comprises a water inlet distributor, an inclined plate and an interception net, and the water inlet distributor, the inclined plate and the interception net are sequentially arranged at the bottom of the anaerobic membrane separation device.
The water outlet device comprises a membrane group water production regulating valve, a water production flow meter, a vacuum meter, a membrane group water production pump and a water collecting pipe, wherein the water collecting pipe is connected with a flat ceramic membrane group in the anaerobic membrane bioreactor, and the membrane group water production pump is arranged on the water collecting pipe. The flow meter, the membrane group water production regulating valve and the vacuum meter are all arranged on the water collecting pipe, and the vacuum meter is arranged in front of the membrane group water production pump.
The reflux unit comprises a mixed liquid reflux pump, a reflux regulating valve, a reflux flowmeter, a reflux pipe and a reflux water distributor, wherein the mixed liquid reflux pump is arranged on the reflux pipe, the reflux water distributor is connected with one end of the reflux pipe and arranged at the bottom of the anaerobic membrane separation device, and the reflux regulating valve and the reflux flowmeter are sequentially arranged on the reflux pipe.
In this embodiment, the device for reducing plate-type ceramic membrane pollution of the anaerobic membrane bioreactor further comprises a gas collecting pipe, and the gas collecting pipe is respectively connected with the top gas chamber of the anaerobic bioreactor and the top gas chamber of the membrane separation device.
Different from the structure in embodiment 1, the present embodiment does not have a sludge discharge device, and the sludge discharge principle is specifically as follows:
the anaerobic sludge-water mixed liquor enters the lower part of an inclined plate through a water inlet distributor of an anaerobic membrane separation device for water distribution, the mixed liquor passes through the inclined plate from bottom to top through an inclined plate sedimentation area for solid-liquid separation through static pressure, the separated solid-phase sludge falls into the bottom of the inclined plate from top to bottom and enters an anaerobic bioreactor through a gap between the anaerobic bioreactor and the anaerobic membrane separation device, and in order to prevent the disturbance of upward flowing fluid in the anaerobic bioreactor to the falling sludge, a sludge baffle is arranged below the gap between the anaerobic bioreactor and the anaerobic membrane separation device, and the sludge baffle guides the falling sludge so that the downward flowing sludge flows along the wall of the anaerobic bioreactor in a laminar flow state to prevent the disturbance of the upward flowing fluid.
Example 3
This example provides a method of wastewater treatment using the apparatus of example 1 or 2, comprising the steps of:
s1, confirming that sludge for anaerobic reaction exists in the anaerobic bioreactor, and injecting the wastewater to be treated into the anaerobic bioreactor for anaerobic reaction;
s2, enabling the sludge-water mixed liquor generated after the treatment of the anaerobic bioreactor to enter an anaerobic membrane separation device through a reactor water outlet pipe for further reaction, and controlling the water inflow and the backflow of the anaerobic membrane separation device by adjusting at least one valve of a water inlet adjusting valve, a reactor water outlet adjusting valve, a membrane group produced water adjusting valve and a backflow adjusting valve of the anaerobic bioreactor to ensure that the membrane flux and the flow speed between templates are normal;
s3, adjusting the adding proportion of the composite biological carrier in the anaerobic membrane separation device, displaying transmembrane pressure difference through a vacuum meter, and controlling the backwashing frequency of backflow water;
s4, enabling the mixed liquor between the upper membranes to rapidly flow upwards through the membrane gaps under the reflux action of the mixed liquor reflux pump by the mixed liquor reflux pump to form hydraulic scouring on the plate-type ceramic membrane;
s5, discharging water generated in the anaerobic membrane separation device to a clean water tank from the outside by using a membrane group water generating pump, and backwashing the membrane from the inside to the outside by using a backwashing pump during backwashing; and alternately switching on and off the membrane group production water pump and the backwashing pump. And the sludge separated in the anaerobic membrane separation device is recycled to the anaerobic bioreactor through a sludge discharge device or a sludge baffle plate.
Example 4
The embodiment provides a method for reducing plate-type ceramic membrane pollution of an anaerobic membrane bioreactor, which is implemented by aiming at potato starch wastewater, and comprises the steps of injecting inoculated sludge into the anaerobic bioreactor for sludge culture, confirming that the sludge quantity is enough for anaerobic reaction, injecting potato starch wastewater to be treated into the anaerobic bioreactor, continuously feeding water into the anaerobic bioreactor, and controlling the temperature of the anaerobic bioreactor to be 35-38 ℃ as shown in raw water quality indexes in table 1.
TABLE 1 Water in and out indices of anaerobic ceramic Membrane bioreactor
The water inlet amount, the membrane flux and the reflux amount of the membrane group separator are controlled by adjusting a water inlet adjusting valve, a reactor water outlet adjusting valve, a membrane group produced water adjusting valve and a reflux adjusting valve of the anaerobic bioreactor. Adjusting the adding ratio of the composite biological carrier; the transmembrane pressure difference is displayed by a vacuum gauge to control the backwashing frequency. The operation indexes of the anaerobic membrane separation device are shown in the table 2.
TABLE 2 operating index of anaerobic ceramic membrane bioreactor
Meanwhile, the reactor is compared with a conventional anaerobic ceramic membrane bioreactor under the condition that other conditions are kept consistent, when the quality of the effluent water is lower than the effluent water quality standard, the reactor device is cleaned, the chemical cleaning period is recorded respectively, the last line of data in the table 2 is shown, the chemical cleaning period of the conventional anaerobic ceramic membrane bioreactor is 180-210 days, but the cleaning period of the anaerobic ceramic membrane bioreactor is 230-250 days. The result shows that the membrane pollution period can be prolonged and the membrane pollution can be effectively relieved by controlling the flow velocity between the ceramic membrane plates, filling a certain amount of composite biological carriers and matching with proper backwashing under the action of the water distribution device and the guide plate. Finally, compared with the conventional anaerobic ceramic membrane bioreactor, the average chemical cleaning period is prolonged by 20-30%.
Through adopting the utility model discloses an above-mentioned technical scheme has obtained following profitable effect:
(1) the utility model discloses sludge concentration keeps difficulty, mud-water separation is incomplete, the serious phenomenon of anaerobic system mud loss among the organic waste water anaerobic treatment, is applied to board-like ceramic membrane among the anaerobic reaction system to constitute an anaerobic membrane separator, through water backwash, the quick circulation between board is cuted and is washd and compound bio-carrier's mechanical friction, and combine water backwash mode to reduce to pass membrane pressure differential, reduce membrane pollution and maintain membrane flux, reduce membrane pollution.
(2) The utility model discloses sludge concentration is higher in the anaerobic membrane separator in the device, goes into anaerobic bioreactor by the backward flow of anaerobic membrane separator, improves anaerobic bioreactor sludge concentration, has better treatment effect for traditional anaerobic bioreactor extrinsic cycle to can improve anaerobic bioreactor's treatment effeciency, promote out water quality of water.
(3) Under the flow state distribution and strengthening action of the reflux water distribution pipe and the guide plate, the fluid in the anaerobic membrane separation device forms quick circulation hydraulic shear between plates, and the pollution blocking phenomenon of a membrane component in the membrane separation reactor is prevented or delayed by driving the composite biological carrier to mechanically scrub pollutants on the surface of the flat ceramic membrane and matching with water backwashing.
(4) The utility model discloses put the operation with anaerobism bioreactor and membrane module branch, can effectively reduce the absorption and the deposit of mud on the membrane surface in the anaerobism bioreactor, when effectively alleviating the membrane pollution, improved anaerobism bioreactor's treatment effeciency and play water quality of water.
(5) The utility model discloses pack a density among the device anaerobic membrane separator and be 0.95 ~ 0.98g/cm3The composite biological carrier with hydrophilic organic or inorganic material and irregular geometric shape can be used as a scrubbing material on the surface of the ceramic membrane, and provides an attachment place for microorganisms in the anaerobic membrane separation device to improve the sludge concentration. The composite biological carrier flows and leads to between the plates along with water flow under a certain adding ratioAnd the attachments on the surface of the membrane are cleaned through cross flow scrubbing with the surface of the ceramic membrane, so that the membrane pollution is effectively reduced, and the service life of the anaerobic ceramic membrane is prolonged.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be viewed as the protection scope of the present invention.
Claims (9)
1. The device for reducing the pollution of the plate-type ceramic membrane of the anaerobic membrane bioreactor is characterized by comprising an anaerobic bioreactor and an anaerobic membrane separation system, wherein the anaerobic bioreactor is connected with the anaerobic membrane separation system through a water outlet pipe;
the anaerobic membrane separation system comprises a water inlet device, an anaerobic membrane separation device, a reflux device and a water outlet device, wherein the water inlet device is arranged at the bottom of the anaerobic membrane separation device, and the water outlet device is arranged at the top of the anaerobic membrane separation device; one end of the reflux device is connected to the top end of the anaerobic membrane separation device, and the other end of the reflux device is arranged at the bottom end of the anaerobic membrane separation device.
2. The device for reducing the plate ceramic membrane fouling of an anaerobic membrane bioreactor according to claim 1, wherein the anaerobic membrane separation device comprises composite bio-carriers, a flat plate ceramic module and a deflector plate, wherein the composite bio-carriers are dispersed around the flat plate ceramic module, and the deflector plate is arranged at the top end of the anaerobic membrane separation device.
3. The device for reducing the pollution of the plate-type ceramic membrane of the anaerobic membrane bioreactor according to claim 1, wherein the water inlet device comprises a water inlet distributor, an inclined plate and an interception net, and the water inlet distributor, the inclined plate and the interception net are sequentially arranged at the bottom of the anaerobic bioreactor.
4. The device for reducing the pollution of the plate-type ceramic membrane of the anaerobic membrane bioreactor according to claim 1, wherein the water outlet device comprises a membrane module water production pump and a water collection pipe, the water collection pipe is connected with the plate-type ceramic membrane module in the anaerobic membrane separation device, and the membrane module water production pump is arranged on the water collection pipe.
5. The device for reducing the pollution of the plate-type ceramic membrane of the anaerobic membrane bioreactor according to claim 4, wherein the water outlet device further comprises a membrane group produced water regulating valve, a membrane group produced water flow meter and a vacuum gauge, wherein the flow meter, the membrane group produced water regulating valve and the vacuum gauge are all arranged on the water collecting pipe, and the vacuum gauge is arranged in front of the membrane group produced water pump.
6. The device for reducing the plate-type ceramic membrane pollution of the anaerobic membrane bioreactor according to claim 1, wherein the reflux device comprises a mixed liquid reflux pump, a reflux pipe and a reflux water distributor, the mixed liquid reflux pump is arranged on the reflux pipe, and the reflux water distributor is connected to one end of the reflux pipe and arranged at the bottom of the anaerobic membrane separation device.
7. The device for reducing the plate-type ceramic membrane pollution of the anaerobic membrane bioreactor of claim 1, further comprising a gas collecting pipe, wherein the gas collecting pipe is respectively connected with the top gas chamber of the anaerobic bioreactor and the top gas chamber of the anaerobic membrane separation device.
8. The device for reducing the pollution of the plate-type ceramic membrane of the anaerobic membrane bioreactor according to any one of claims 1 to 7, further comprising a sludge discharge device, wherein the sludge discharge device returns sludge generated by the anaerobic membrane separation system to the anaerobic bioreactor, the sludge discharge device comprises a sludge discharge pipe and a sludge discharge reflux pump, the sludge discharge pipe is arranged at the lower end of the water inlet distributor, and the sludge discharge reflux pump is arranged between the sludge discharge pipe and the anaerobic bioreactor.
9. The device for reducing the pollution of the plate-type ceramic membrane of the anaerobic membrane bioreactor according to any one of claims 1 to 7, wherein the device for reducing the pollution of the plate-type ceramic membrane of the anaerobic membrane bioreactor further comprises a sludge baffle plate, and the sludge baffle plate is used for guiding the sludge generated by the anaerobic membrane separation device.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110713255A (en) * | 2019-11-20 | 2020-01-21 | 中科院建筑设计研究院有限公司 | Device and method for reducing pollution of plate-type ceramic membrane of anaerobic membrane bioreactor |
| CN112174306A (en) * | 2020-10-28 | 2021-01-05 | 深圳中清环境科技有限公司 | Ceramic membrane sewage treatment equipment and method based on domesticated active microorganisms |
| CN114314828A (en) * | 2021-12-31 | 2022-04-12 | 西南交通大学 | Anaerobic fluidized bed membrane bioreactor |
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2019
- 2019-11-20 CN CN201922012553.XU patent/CN211445222U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110713255A (en) * | 2019-11-20 | 2020-01-21 | 中科院建筑设计研究院有限公司 | Device and method for reducing pollution of plate-type ceramic membrane of anaerobic membrane bioreactor |
| CN112174306A (en) * | 2020-10-28 | 2021-01-05 | 深圳中清环境科技有限公司 | Ceramic membrane sewage treatment equipment and method based on domesticated active microorganisms |
| CN112174306B (en) * | 2020-10-28 | 2022-01-04 | 深圳中清环境科技有限公司 | Ceramic membrane sewage treatment equipment and method based on domesticated active microorganisms |
| CN114314828A (en) * | 2021-12-31 | 2022-04-12 | 西南交通大学 | Anaerobic fluidized bed membrane bioreactor |
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