CN202766387U - Mud-membrane symbiotic hybrid membrane bioreactor - Google Patents

Abstract

The utility model relates to a mud film symbiotic composite membrane bioreactor, which comprises an anaerobic baffle unit, anoxic unit, a contact oxidation unit and a membrane bioreaction unit; The water hole is connected to the anoxic unit, and the anoxic unit is connected to the contact oxidation unit through the second water hole, and the side wall of the anoxic unit is provided with a mixed liquid return pipe near the second water hole, and the mixed liquid return pipe is connected to the anaerobic The water inlet end of the baffle unit is connected; the contact oxidation unit is connected with the membrane bioreaction unit through the third water hole; the membrane bioreaction unit is connected with the anoxic unit through the backflow pump through the wall. The reactor is mainly used for the treatment and reuse of domestic sewage, slightly polluted source water, industrial wastewater and high ammonia nitrogen organic industrial wastewater.

Description

A mud film symbiotic composite membrane bioreactor

technical field

The utility model relates to a waste water treatment device, in particular to the treatment and reuse of domestic sewage, slightly polluted source water, industrial waste water and high ammonia nitrogen organic industrial waste water.

Background technique

my country is extremely short of fresh water resources, and the per capita fresh water resources are only 1/3 of the world average. Among the more than 660 cities in China, about 400 are short of water, and about 108 are seriously short of water. China's annual industrial and domestic sewage discharge amounts to more than 60 billion m ³ , and 90% of urban waters are polluted to varying degrees. How to treat sewage and waste water with high efficiency and low consumption, so that it can be recycled and reused or discharged up to the standard is an important issue in the field of sewage and waste water treatment. At present, commonly used wastewater treatment processes include activated sludge process, biofilm process, membrane bioreactor and other processes.

The activated sludge method is a microbial suspension growth system, and the biofilm method is a microbial attachment growth system. Both processes have their own advantages and disadvantages. Activated sludge biological phosphorus removal requires a shorter sludge age, while the nitrification of ammonia nitrogen requires a longer sludge age, and the two often cannot be balanced. The filler in the biofilm process is conducive to the growth of nitrifying bacteria, but not conducive to the growth of phosphorus accumulating bacteria, and the effect of biological phosphorus removal is poor. The composite bioreactor is a bioreactor in which suspended growth microorganisms and attached growth microorganisms act together. The microbial sludge age attached to and growing in the compound bioreactor is longer, which is beneficial to the biological growth of nitrifying bacteria; the microorganisms growing in suspension can be controlled in a shorter sludge age state, and are repeatedly in anaerobic, anoxic, and aerobic environments. Conducive to biological phosphorus removal. The composite bioreactor can better meet the requirements of biological denitrification and biological phosphorus removal, but there are still problems such as difficult cultivation of suspended microorganisms and difficult precipitation of shedding biofilms.

膜的工艺优化及应用问题，包括能耗高、工艺流程形式及应用领域需不断研究等问题。 The membrane bioreactor (MBR) process is an organic combination of sewage biological treatment technology and membrane separation technology. After the sewage is decomposed and transformed by the biological treatment in the reactor, the solid-liquid separation of the sewage is completed by the efficient separation of the microfiltration membrane (MF) or ultrafiltration membrane (UF), so as to achieve the purification effect. The membrane module installed in the reactor can completely replace the secondary settling tank and conventional filtration and adsorption units in the traditional process, so that the hydraulic retention time (HRT) and the sludge age (SRT) can be completely separated, and stable and high-quality effluent water quality can be obtained. . Although MBR has the advantages of excellent effluent quality, small footprint, and less residual sludge, there are still two problems: Problems with the membrane material itself, including easy membrane fouling, high cost/low flux of membrane materials, membrane broken wires, etc.;

Membrane process optimization and application issues, including high energy consumption, process flow form and application fields need to be continuously studied.

The closest existing technology is: the utility model of the patent 201120242413.2 discloses a reclaimed water treatment device with slightly polluted water as the water source, including a conventional water treatment unit, and a biological pretreatment unit is added to the front part of the conventional water treatment unit. An advanced treatment membrane unit is added to the rear part of the conventional water treatment unit; the biological pretreatment unit is composed of an anaerobic tank, an anoxic hydrolysis acidification tank, and a biological contact oxidation tank; the advanced treatment membrane unit is a membrane bioreactor. The device has certain advantages, but the device is mainly aimed at the treatment of slightly polluted water, and does not involve the treatment and reuse of domestic sewage, industrial wastewater, and high-ammonia-nitrogen organic industrial wastewater; the microorganisms in the device are mainly attached in the form of biofilm On the carrier, the mud-membrane symbiosis system is not mentioned, and the volume load of the device is relatively low, and the energy consumption is relatively high.

Utility model content

The purpose of this utility model is to solve the problems such as easy membrane pollution of membrane bioreactor, conflict of sludge age required for denitrification and phosphorus removal in activated sludge process, poor biological phosphorus removal effect of biofilm process, etc., aiming to provide A mud film symbiosis composite membrane bioreactor (referred to as HBR- MBR reactor).

For solving the problems referred to above, the technical solution of the utility model is:

A mud film symbiotic composite membrane bioreactor, including anaerobic baffle unit, anoxic unit, contact oxidation unit and membrane bioreaction unit;

The top of the side wall of the anaerobic baffle unit is provided with a water inlet pipe; the anaerobic baffle unit communicates with the anoxic unit through the first water hole, wherein the first water hole is set between the anaerobic baffle unit and the anoxic unit. On the common side wall of the unit;

There is suspended filler I in the anoxic unit, and a submerged aeration and stirring machine is installed floating in the middle; the anoxic unit communicates with the contact oxidation unit through the second water hole, and the second water hole is set in the anoxic unit On the side wall shared with the contact oxidation unit; the side wall of the anoxic unit is provided with a mixed liquid return pipe and a mixed liquid return pump installed on the mixed liquid return pipe near the second water hole. The water inlet end of the baffle unit is connected;

There is suspended filler II in the contact oxidation unit, and a microporous aerator is installed at the bottom; the contact oxidation unit communicates with the membrane bioreaction unit through the third water hole, and the third water hole is set between the contact oxidation unit and the membrane bioreactor. On the common side wall of the reaction unit;

The membrane bioreaction unit is provided with at least one set of membrane units, the top of the membrane units is provided with an outlet pipe, and the outlet pipe is provided with a suction pump; the bottom of the membrane units is provided with a perforated aerator, and each group or more The perforated aerator at the bottom of the membrane stack is connected to the air duct II, and the air duct II is equipped with a pulse valve; the bottom of the membrane bioreaction unit is provided with a sludge discharge pipe, which is connected to the sludge discharge pump; the membrane bioreaction unit passes through The through-wall reflux pump communicates with the anoxic unit, wherein the through-wall reflux pump is arranged at the lower part of the side wall shared by the membrane bioreaction unit and the anoxic unit.

The first water hole, the second water hole, the third water hole and the backflow pump through the wall are preferably provided with screens vertically.

The membrane assembly is preferably a hollow fiber membrane module or a flat membrane module.

The anaerobic baffle unit is preferably composed of multiple baffle chambers connected in series, and a body elastic filler is set in the middle of each baffle chamber, and a vertical baffle is arranged in the middle; each baffle chamber is provided with a mud bucket at the bottom, and each mud bucket A mud suction pipe is arranged at the bottom, and the mud suction pipe is connected with a mud suction pump.

The mud bucket is preferably a tapered mud bucket.

The utility model is further explained and illustrated below:

The anaerobic baffle unit is composed of multiple baffle chambers connected in series. A conical mud hopper is arranged at the lower part of each baffle chamber, and a mud suction pipe is arranged at the bottom of each mud hopper, and the mud suction pipe is connected to a mud pump. In the middle of each baffle chamber, there is a body elastic filler, and a vertical baffle is set in the middle. The water flow goes down vertically, then bypasses the baffle, and then deflects vertically upwards. It passes through each baffle one by one to react, and has a good hydraulic flow state.

The anoxic unit contains suspended fillers. The liquid surface of the anoxic unit floats and is equipped with a submerged aeration and agitation machine. The submerged aeration and agitation machine mainly plays the role of mixing and stirring, and can also aerate when necessary. Anoxic unit, anaerobic baffle unit, contact oxidation unit and membrane bioreaction unit are provided with water holes on the partition walls, and screens are vertically installed at the water holes, and the screens play the role of separating the suspended fillers of each unit. The anoxic unit is provided with a mixed liquid return pipe, and the mixed liquid return pipe is connected with a mixed liquid return pump.

The contact oxidation unit contains suspended fillers, and a microporous aerator is installed at the bottom. The aeration system provides the oxygen required for microbial reactions and maintains a good mixing state of gas, solid and liquid.

At least one set of membrane modules is arranged in the membrane bioreaction unit, and the membrane modules adopt hollow ultrafiltration membrane modules or flat microfiltration membrane modules. The membrane unit adopts the negative pressure of the suction pump to suck out the water. A perforated aerator is installed at the bottom of the membrane bioreactor unit, and pulse aeration is adopted. The side wall shared by the contact oxidation unit and the membrane bioreaction unit is provided with a water hole, and a screen is vertically arranged at the water hole, and the screen plays the role of separating the suspended fillers of each unit. A through-wall reflux pump is provided at the middle and lower part of the partition wall between the membrane bioreaction unit and the anoxic unit, and the nitrifying liquid in the membrane bioreaction unit is returned to the anoxic unit through the through-wall reflux pump.

The water holes between the units are provided with screens to cut off the suspended fillers of each unit; the screens are made of corrosion-resistant materials such as stainless steel, glass fiber reinforced plastics, and polyurethane. Suspended fillers are selected from one or more of columnar suspended fillers, spherical suspended fillers, polyurethane biological fillers or combined suspended fillers.

The reflux ratio is the ratio of the volume flow of return water to the volume flow of feed water.

The air-to-water ratio is the ratio of the aeration volume air volume to the water volume flow rate.

The utility model has the following characteristics:

1. The anaerobic baffle unit, the anoxic unit and the contact oxidation unit have suspension growth and attachment growth microorganisms. The two play their respective advantages and jointly undertake the role of removing pollutants. They have high efficiency of suspension growth method and adaptability of attachment growth method. Strong and stable advantages, stronger processing capacity. Membrane bioreaction unit contains only suspended growth microorganisms, which can control lower suspended sludge concentration (MLSS) and extracellular polymer (EPS) concentration to achieve the purpose of slowing membrane fouling.

2. The concentration of ammonia nitrogen in the effluent of HBR-MBR reactor is lower than that of activated sludge MBR, and the ability to resist impact load is enhanced. The biofilm formed due to the intervention of biological carriers has a multi-layer structure. From the outside to the inside, due to the increase of oxygen transfer resistance, an oxygen concentration gradient is formed, and then the outer layer is mainly aerobic, while the inner layer is anoxic or anaerobic. The main microenvironment is conducive to improving the biological nitrogen and phosphorus removal capacity of the system.

3. The use of anaerobic deflection can strengthen the effect of anaerobic treatment and reduce the unit volume of aerobic treatment, thereby reducing energy consumption. The use of pulse aeration can reduce the energy consumption of MBR aeration, and at the same time, it can meet the microbial oxygen demand and membrane scouring conditions, maintain a high cross-flow velocity on the surface of membrane filaments, and reduce membrane fouling.

4. The MBR membrane technology is used to replace the secondary sedimentation tank, which has the advanced nature of the MBR process and can solve the problem of excessive suspended solids caused by the difficulty of sedimentation of the exfoliated biofilm in the simple biofilm method. It can intercept microorganisms that are not easy to accumulate, improve the quality of effluent and easily form a mud film symbiosis system, and strengthen simultaneous nitrogen and phosphorus removal.

5. It adopts a new type of suspended filler, which can be put in directly without fixing. It has the characteristics of strong bioadhesion, large specific surface area, and less residual sludge. The anoxic unit and the contact oxidation unit, and the water holes between the contact oxidation unit and the membrane bioreactor are all made of stainless steel screens, which can effectively separate the suspended fillers and maintain the number of fillers in each unit.

Compared with the prior art, the main advantages of the utility model are:

The device of the utility model makes the effluent quality good and reusable, has good effect of synchronous denitrification and dephosphorization, resists membrane pollution, low energy consumption, high volume load, stable operation, and occupies less land.

Description of drawings

Fig. 1 is the planar structure schematic diagram of mud film symbiosis composite membrane bioreactor of the present utility model;

Fig. 2 is the A-A sectional view of Fig. 1;

Fig. 3 is the B-B sectional view of Fig. 1;

Fig. 4 is the C-C sectional view of Fig. 1;

Fig. 5 is the utility model sewage treatment process flowchart;

In the figure, 1-anaerobic baffle unit; 2-anoxic unit; 3-contact oxidation unit; 4-membrane bioreaction unit; 5-inlet pipe; 6-baffle chamber; 7-stereoelastic packing; 8- Vertical baffle; 9- mud hopper; 10- mud pump; 11- mud pump; 12- first water hole; 13- suspended filler Ⅰ; 14- aeration and stirring dual-purpose machine; Hole; 16-Mixed liquid return pipe; 17-Mixed liquid return pump; 18-Suspended packing II; 19-Microporous aerator; 20-Third water hole; 21-Perforated aerator; 22-Membrane group ;23-outlet pipe; 24-wall return pump; 25-screen; 26-suction pump; 27-drain pipe; 28-drain pump; 29-pulse valve; 30-blower; ; 32 - Duct II.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is described further.

Example 1

It can be seen from Figures 1 to 5 that a mud film symbiosis composite membrane bioreactor includes anaerobic baffle unit (1), anoxic unit (2), contact oxidation unit (3) and membrane bioreaction unit (4 );

The top of the side wall of the anaerobic baffle unit (1) is provided with a water inlet pipe (5); the anaerobic baffle unit (1) communicates with the anoxic unit (2) through the first water hole (12), wherein The first water hole (12) is set on the side wall shared by the anaerobic baffle unit (1) and the anoxic unit (2);

The anoxic unit (2) has a suspended filler I (13) inside, and a submerged aeration and stirring machine (14) is installed floating in the middle; the anoxic unit (2) contacts with the The oxidation unit (3) is connected, wherein the second water passage hole (15) is set on the side wall shared by the anoxic unit (2) and the contact oxidation unit (3); the side wall of the anoxic unit (2) is close to the second water passage The hole (15) is provided with a mixed liquid return pipe (16) and a mixed liquid return pump (17) installed on the mixed liquid return pipe (16), and the mixed liquid return pipe (16) is connected with the anaerobic baffle unit (1 ) connected to the water inlet;

The contact oxidation unit (3) has a suspended filler II (18) inside and a microporous aerator (19) at the bottom; the contact oxidation unit (3) communicates with the membrane bioreaction unit ( 4) Connected, wherein the third water hole (20) is set on the side wall shared by the contact oxidation unit (3) and the membrane bioreaction unit (4);

The membrane bioreaction unit (4) is provided with at least one set of membrane units (22), and the top of the membrane unit (22) is provided with an outlet pipe (23), and the outlet pipe (23) is provided with a suction pump ( 26); the bottom of the membrane unit (22) is provided with perforated aerators (21), and the perforated aerators (21) at the bottom of each group or multiple groups of membrane units are connected to the air duct II (32), and the air duct II (32 ) is equipped with a pulse valve (29); the bottom of the membrane bioreaction unit (4) is provided with a sludge discharge pipe (27), and the sludge discharge pipe (27) is connected to the sludge discharge pump (28); the membrane bioreaction unit (4) The through-wall backflow pump (24) communicates with the anoxic unit (2), wherein the through-wall backflow pump (24) is arranged at the lower part of the side wall shared by the membrane bioreaction unit (4) and the anoxic unit (2).

The membrane assembly (22) is a hollow fiber membrane module or a flat membrane module.

The anaerobic baffle unit (1) is composed of multiple baffle chambers (6) connected in series, each baffle chamber (6) has a body elastic filler (7) in the middle, and a vertical baffle (8) in the middle; The baffle chamber is provided with mud hoppers (9) at the bottom, and a mud pumping pipe (10) is arranged at the bottom of each mud hopper, and the mud pumping pipe (10) is connected with the mud pumping pump (11).

The mud bucket (9) is a tapered mud bucket.

The first water hole (12), the second water hole (15), the third water hole (20) and the through-wall return pump (24) are all vertically provided with screens (25).

application

Sewage and wastewater after front-end pretreatment (such as domestic sewage treated by grille, sand settling, etc.) enters the anaerobic baffle unit, and the water flows vertically downward, then bypasses the baffle plate, and then vertically upwards, passing through each grid one by one. Reactive, with good hydraulic flow. The anaerobic baffle unit mainly completes the hydrolysis and acidification reaction of refractory organic matter, improves the biodegradability of sewage, and at the same time completes the anaerobic phosphorus release reaction.

The anoxic unit contains suspended filler I (columnar suspended filler). The liquid surface of the anoxic unit is floating and equipped with a submerged aeration and agitation machine. Can be aerated. Anoxic unit, anaerobic baffle unit, contact oxidation unit and membrane bioreaction unit are provided with water holes on the partition walls, and screens are vertically installed at the water holes, and the screens play the role of separating the suspended fillers of each unit. The nitrifying liquid in the membrane bioreaction unit flows back to the anoxic unit for denitrification reaction, and the nitrate nitrogen becomes nitrogen gas to complete the denitrification. The organic matter in the effluent of the anaerobic baffle unit can provide the carbon source required for the denitrification reaction. The anoxic unit is provided with a mixed liquid return pipe, and the mixed liquid return pipe is connected with a mixed liquid return pump. Part of the effluent from the anoxic unit flows back to the anaerobic baffle unit, which greatly reduces the adverse effects of nitrate nitrogen on the anaerobic phosphorus release reaction, and the other part flows into the contact oxidation unit.

The contact oxidation unit contains suspended packing II (columnar suspended packing), and a microporous aerator is installed at the bottom. The aeration system provides the oxygen required for microbial reactions and maintains a good mixing state of gas, solid and liquid. The organic matter in the sewage is oxidized and degraded by microorganisms, and the ammonia nitrogen is oxidized to nitrate nitrogen or nitrite nitrogen. Soluble phosphate is overabsorbed by microorganisms and reduced by sludge discharge.

The membrane bioreaction unit is provided with multiple sets of membrane units, and the membrane units adopt hollow fiber membrane modules or flat-plate membrane modules. The membrane unit adopts the negative pressure of the suction pump to suck out the water. A perforated aerator is installed at the bottom of the membrane bioreactor unit, and pulse aeration is adopted. The partition wall between the contact oxidation unit and the membrane bioreaction unit is provided with a water hole, and a screen is vertically arranged at the water hole, and the screen plays the role of separating the suspended fillers of each unit. A through-wall reflux pump is provided at the middle and lower part of the partition wall between the membrane bioreaction unit and the anoxic unit, and the nitrifying liquid in the membrane bioreaction unit is returned to the anoxic unit through the through-wall reflux pump. The membrane bioreaction unit can further degrade COD, ammonia nitrogen and excess phosphorus uptake. The concentration of suspended sludge (MLSS) in the biological reaction unit is generally controlled at 2000-2500mg/L to slow down the blockage of the membrane pores of the membrane bioreactor.

application

A kind of mud film symbiosis composite membrane bioreactor of embodiment 1 is carried out the method for sewage treatment and reuse to process domestic sewage, concrete steps are:

(1) The sewage enters the anaerobic baffle unit through the water inlet pipe to complete the hydrolysis and acidification reaction, and at the same time complete the anaerobic phosphorus release reaction, and control the dissolved oxygen in the anaerobic baffle unit to ≤0.2mg/L;

(2) The effluent from the anaerobic baffle unit enters the anoxic unit to react, and the dissolved oxygen in the anoxic unit is controlled to be ≤0.5mg/L; part of the effluent (mixed liquid) from the anoxic unit is returned to the anaerobic baffle unit, and the reflux ratio is controlled to 25%- 100%, the other part enters the contact oxidation unit, and the dissolved oxygen in the contact oxidation unit is controlled to 2mg/L-6mg/L; the organic matter in the sewage is oxidized and degraded by microorganisms in the contact oxidation unit, and the ammonia nitrogen is oxidized to nitrate nitrogen or nitrite nitrogen ;Soluble phosphate is excessively absorbed by microorganisms and reduced by sludge discharge;

(3) After the effluent from the contact oxidation unit enters the membrane bioreaction unit for treatment, the effluent is sucked by the suction pump under negative pressure to control the dissolved oxygen of the membrane bioreaction unit to 2mg/L-6mg/L, and the concentration of suspended sludge to be 2000mg/L～2500mg /L, the membrane bioreaction unit uses a pulse valve to control the air volume, and performs pulse aeration to reduce the energy consumption of aeration. Part of the mud-water mixture (nitrification liquid) containing nitrite or nitrate nitrogen in the reaction unit is returned to the anoxic unit for denitrification reaction, and the reflux ratio is controlled at 50%-200%, in which nitrite or nitrate nitrogen is denitrified into Nitrogen to complete denitrification.

Among them, the influent water quality: the average value of COD is 302.6 mg/L, the average value of BOD ₅ is 114.2 mg/L, the average value of NH ₃ -N is 19.8 mg/L, and the average value of TP is 1.56 mg/L.

Outlet water quality: COD average 25.6mg/L, BOD ₅ average 4.4mg/L, NH ₃ -N average 1.8mg/L, TP average 0.34mg/L, effluent turbidity less than 1NTU. After disinfection, the effluent meets the urban miscellaneous water quality standard of "Urban Sewage Recycling and Utilization Urban Miscellaneous Water Quality" (GBT 18920-2002), and can be reused as water for greening or flushing toilets in the community.

Removal rate: COD 91.5%, BOD ₅ 96.1%, NH ₃ -N 90.9%, TP 78.2%.

Operating process conditions: the hydraulic retention time of the anaerobic baffle unit (1) is 1h, and the dissolved oxygen is ≤0.2mg/L; the hydraulic retention time of the anoxic unit (2) is 1.5h, and the dissolved oxygen is ≤0.5mg/L; the contact oxidation unit (3) hydraulic retention time 3h, dissolved oxygen 2-6mg/L; membrane bioreaction unit (4) hydraulic retention time 1.5h, dissolved oxygen 2-6mg/L, suspended sludge concentration 2000-2500 mg/L, The average air-water ratio is ≤15:1.

Claims (5)

1. a mud film symbiosis combined film bioreactor comprises anaerobic baffled unit (1), anoxic unit (2), catalytic oxidation unit (3) and membrane biological reaction unit (4); It is characterized in that,

One top side wall of described anaerobic baffled unit (1) is provided with water inlet pipe (5); Anaerobic baffled unit (1) is communicated with anoxic unit (2) by I water hole (12), and wherein I water hole (12) is arranged on the shared sidewall of anaerobic baffled unit (1) and anoxic unit (2);

Floating stuffing I (13) is arranged in the described anoxic unit (2), floats the dual-purpose machine of aeration agitation (14) under the liquid is installed in the middle part; Anoxic unit (2) is communicated with catalytic oxidation unit (3) by II water hole (15), and wherein II water hole (15) is arranged on the shared sidewall in anoxic unit (2) and catalytic oxidation unit (3); Anoxic unit (2) sidewall is located to be provided with mixed-liquor return pipe (16) near II water hole (15) and is installed in mixed-liquor return pump (17) on the mixed-liquor return pipe (16), and this mixed-liquor return pipe (16) is communicated with the feed-water end of anaerobic baffled unit (1);

Floating stuffing II (18) is arranged in the described catalytic oxidation unit (3), and the bottom is provided with micro-hole aerator (19); Catalytic oxidation unit (3) is communicated with membrane biological reaction unit (4) by III water hole (20), and wherein III water hole (20) is arranged on the shared sidewall in catalytic oxidation unit (3) and membrane biological reaction unit (4);

Inside, described membrane biological reaction unit (4) is provided with at least one group of film group device (22), and film group device (22) top is provided with rising pipe (23), is provided with suction pump (26) on this rising pipe (23); Film group device (22) bottom is provided with boring aeration device (21), and every group or the boring aeration device (21) of organizing the film group device bottom connect airduct II (32) more, and airduct II (32) is provided with pulse valve (29); Membrane biological reaction unit (4) is provided with shore pipe (27) at the bottom of the pond, and this shore pipe (27) is connected with sludge pump (28); Membrane biological reaction unit (4) is communicated with anoxic unit (2) by reflux pump through walls (24), and wherein reflux pump through walls (24) is arranged on membrane biological reaction unit (4) lower sidewall shared with anoxic unit (2).

2. described a kind of mud film symbiosis combined film bioreactor according to claim 1 is characterized in that, described I water hole (12), II water hole (15), III water hole (20) and reflux pump through walls (24) locate all to be vertically installed with screen cloth (25).

3. described a kind of mud film symbiosis combined film bioreactor according to claim 1 and 2 is characterized in that, described film group device (22) is hollow fiber film assembly or plate type membrane assembly.

4. described a kind of mud film symbiosis combined film bioreactor according to claim 1 and 2, it is characterized in that, described anaerobic baffled unit (1) is composed in series by many lattice baffling chamber (6), and body elasticity filler (7) is set up at middle part, every lattice baffling chamber (6), and vertical baffle (8) is established in the centre; Every lattice baffling chamber, the bottom is provided with bucket (9), and each bucket bottom is provided with extraction mud pipe (10), and this extraction mud pipe (10) is connected with slush pump (11).

5. described a kind of mud film symbiosis combined film bioreactor according to claim 4 is characterized in that, described bucket (9) is the taper bucket.

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