CN203451337U - Intensive type membrane bioreactor (MBR) for removing nitrogen and phosphorus - Google Patents
Intensive type membrane bioreactor (MBR) for removing nitrogen and phosphorus Download PDFInfo
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- CN203451337U CN203451337U CN201320549819.4U CN201320549819U CN203451337U CN 203451337 U CN203451337 U CN 203451337U CN 201320549819 U CN201320549819 U CN 201320549819U CN 203451337 U CN203451337 U CN 203451337U
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Abstract
The utility model discloses an intensive type membrane bioreactor (MBR) for removing nitrogen and phosphorus. The intensive type MBR for removing nitrogen and phosphorus comprises an inverted A/A/O (Anaerobic/Anoxic/Oxic) reaction tank, wherein the inverted A/A/O (Anaerobic/Anoxic/Oxic) reaction tank comprises an anoxic/anaerobic tank and an MBR tank, a plurality of guide plates are arranged in the anoxic/anaerobic tank, the anoxic/anaerobic tank is divided into an anoxic zone and an anaerobic zone from bottom to top, the anoxic zone is communicated with a water inlet pipe, the anaerobic zone is communicated with the MBR tank, an aerobic zone guide plate, an MBR membrane assembly and a filler are arranged in the MBR tank, a sludge outlet at the bottom of the MBR tank and a mixed liquid port at the upper part of the MBR tank are respectively communicated with the anoxic zone and anaerobic zone of the anoxic/anaerobic tank by virtue of corresponding branch pipes after being combined by a sludge/mixed liquid reflux pump, and the water outlet of the MBR membrane assembly is communicated with a water producing pipe. The intensive type membrane bioreactor for removing nitrogen and phosphorus has reasonably spatial arrangement, can be used for further reducing the energy consumption, and is especially suitable for treatment of dispersive sewage in urban living areas, guesthouses, restaurants, office buildings, shopping centers and the like.
Description
Technical field
The utility model relates to technical field of sewage, relates in particular to a kind of intensive denitrogenation dephosphorizing membrane biological reaction apparatus.
Background technology
Existing municipal effluent biochemical process denitrification dephosphorization technique mainly contains following three major types: A/A/O technique, oxidation ditch process and SBR method, municipal effluent generally passes through biochemical denitrification dephosphorization, then gets final product qualified discharge after precipitating sterilization.Along with the growing tension of water resources, sewage is further processed on the basis of qualified discharge, thereby in realizing, water reuse becomes the direction of a development gradually.Various biochemical treatment+MBR membrane bioreactor combination procesies arise at the historic moment.
Inversion A/A/O technique is the technical process that has adopted anoxic-anaerobic-aerobic.Compare with conventional A/A/O technique, inversion A/A/O technique has been saved mixed solution internal reflux, has suitably strengthened return sludge ratio.It has following characteristics: 1. oxygen-starved area is positioned at technique front end, can meet denitrifying carbon source demand, has saved adding of carbon source when having strengthened denitrification functions; 2. polyP bacteria directly enters aerobic environment after anaerobic phosphorus release, and the suction phosphorus power that it forms under anaerobic state can be fully used, and has improved the dephosphorization ability for the treatment of system; 3. the mixed-liquor return system of conventional A/A/O technique and sludge reflux system are merged into a return-flow system, have simplified technical process, reduced running cost.
In inversion A/A/O, the first two A represents respectively anoxic pond and anaerobic pond, and a rear O represents Aerobic Pond.
MBR membrane bioreactor is that activated sludge process and membrane separation technique are combined, and replaces the sewage disposal novel method of second pond in traditional conventional activated sludge method with membrane separation technique.Have benefited from the high rejection of film, make to maintain higher sludge concentration in bio-reactor, the organic pollutant content of water outlet is dropped to minimum, can effectively remove ammonia nitrogen, also very effective to the trade effluent of difficult degradation.In addition, also have can obtain high quality water quality treatment, floor space little, be easy to install many advantages such as operation is convenient.
Due to MBR membrane bioreactor, exist at present the defects such as energy consumption height, greatly limited its application space.In addition,, although MBR has replaced the second pond in routine biochemistry method, for being applicable to the integration apparatus of urban life community, hotel, restaurant, office building, market isodispersity sewage, floor space is still bigger than normal.
Utility model content
The problem existing for above-mentioned biochemical treatment+MBR membrane bioreactor combination process, the utility model aims to provide a kind of intensive denitrogenation dephosphorizing membrane biological reaction apparatus, this device spatial arrangement is reasonable, can further reduce energy consumption, be particularly useful for the processing of urban life community, hotel, restaurant, office building, market isodispersity sewage.
To achieve these goals, the technical scheme that the utility model adopts is:
An intensive denitrogenation dephosphorizing membrane biological reaction apparatus, comprises inverted A/A/O reaction tank; It is characterized in that, described inverted A/A/O reaction tank comprises anoxic anaerobic pond and MBR membrane biological reaction pond, wherein in anoxic anaerobic pond, be provided with polylith water inlet is directed to the flow deflector at the bottom of anoxic anaerobic pond pond, this anoxic anaerobic pond is divided into oxygen-starved area and anaerobic zone from bottom to up; Described oxygen-starved area is communicated with water inlet pipe, and the water outlet of described anaerobic zone is communicated with MBR membrane biological reaction pond; In described MBR membrane biological reaction pond, be provided with water inlet is directed to Chi Di aerobic zone, MBR membrane biological reaction pond flow deflector, in this MBR membrane biological reaction pond, be provided with the membrane biological reaction district that is positioned at bottom, pond and the catalytic oxidation district that is positioned at top, pond; Described membrane biological reaction is provided with MBR membrane module in district, and described catalytic oxidation is provided with filler in district; The mud mouth of bottom, described MBR membrane biological reaction pond and the mixed solution mouth on top, MBR membrane biological reaction pond are all connected with a shore pipe by mud/mixed-liquor return pump, and this shore pipe is communicated with oxygen-starved area and the anaerobic zone of anoxic anaerobic pond respectively by corresponding arm; The water outlet of described MBR membrane module is communicated with water producing pipe.
In the utility model, O is MBR membrane biological reaction pond, that is, inversion A/A/O is the technique of whole equipment, and MBR membrane biological reaction pond and anoxic pond, anaerobic pond belong to a part of inversion A/A/O side by side.
Thus, oxygen-starved area, anaerobic zone, aerobic zone arrange respectively flow deflector, and sewage is introduced into bottom oxygen-starved area, then rising to ，You anaerobic zone, anaerobic zone from flowing into the membrane biological reaction district of aerobic zone bottom, finally enter catalytic oxidation district, upper strata.
Be below the technical scheme of further improvement of the utility model:
For convenient control, produce water, the top in described MBR membrane biological reaction pond is provided with DO on-line detector and liquid level sensor.
For convenient hydraulic pressure and the flow controlled, guarantee to produce water and keep constant rate operation, and whether automatic decision need to carry out backwash, described water producing pipe is provided with flow sensor, pressure transmitter and control valve; Described water producing pipe is connected with backwash water pump by backwash pipe, and this backwash pipe is provided with flow sensor, pressure transmitter and control valve; On described water inlet pipe, flow sensor is housed.Thus, by frequency transformer, regulate the flow of water inlet pipe, the flow of water inlet pipe flow sensor and water producing pipe flow sensor is consistent, constant to guarantee MBR membrane module top water level.
In order to control the amount that is back to anaerobic zone and oxygen-starved area of mud and mixed solution, described arm is anaerobism backflow arm and anoxic backflow arm; On described anaerobism backflow arm, flow sensor and control valve are housed, on described anoxic backflow arm, flow sensor and control valve are housed.
For sewage is fully mixed with mixed solution, aerobic zone backflow mixed liquor and mud in oxygen-starved area, bottom, the oxygen-starved area of described anoxic anaerobic pond is provided with submersible agitator.
The bottom in described MBR membrane biological reaction pond is provided with the aerating apparatus being connected with gas blower, by gas blower, provides pressurized air, for washing away the active sludge of MBR film surface adhesion and providing dissolved oxygen for top layer catalytic oxidation district.
Described filler is elastic filler; Described MBR membrane module is curtain formula hollow fiber film assembly.
When the water level on described MBR membrane module top is at least 0.5m, water producing pipe produces water.The power of described product water come from MBR membrane module top at least 0.5m(preferred value be 2m) pressure that produces of high water level.
The method of utilizing intensive denitrogenation dephosphorizing membrane biological reaction apparatus of the present utility model to carry out sewage disposal, comprises the steps:
1) sewage enters in the ， oxygen-starved area, oxygen-starved area of anoxic anaerobic pond bottom and rises in the anaerobic zone on anoxic anaerobic pond upper strata after the residence time 3 ~ 4h under the water conservancy diversion of flow deflector,
2) sewage enters the membrane biological reaction district in MBR membrane biological reaction pond in anaerobic zone after the residence time 3 ~ 4h, in Bing membrane biological reaction district, stop after 6 ~ 8h, in described membrane biological reaction district, the concentration of dissolved oxygen is 2 ~ 4mg/L, enters the catalytic oxidation district Bing catalytic oxidation district residence time 5 ~ 6h in MBR membrane biological reaction pond;
3) when the water level on MBR membrane module top is at least 0.5m, water producing pipe produces water, and the mud in MBR membrane biological reaction pond and mixed solution are sent in the oxygen-starved area and anaerobic zone of anoxic anaerobic pond by mud/mixed-liquor return pump and corresponding arm.
Ratio between mud in MBR membrane biological reaction pond and the backflow total amount of mixed solution and sewage flooding quantity is 200% ~ 300%, and sludge age is 8 ~ 20.
Existing inversion A/A/O and the application of MBR combination process engineering are less, and principal mode is according to horizontally disposed each reaction tank of technical process order, and final MBR effluent adopting is produced water pump as suction power, and Aerobic Pond is single activated sludge process.The utility model adopts mode horizontally disposed and that longitudinally layout combines, has saved floor space; Water outlet be take waterhead as power, has reduced energy consumption; And Aerobic Pond installs elastic filler additional, activated sludge process and biomembrance process are combined, in one reaction pool, manufacture two kinds of different microorganism growth environment, be conducive to improve the removal efficiency of organic pollutant.
By said structure, the utility model adopts upper and lower two-layer inversion A/A/O technique+MBR combination.First sewage enter the oxygen-starved area of bottom by guiding region, oxygen-starved area is furnished with submersible agitator, and sewage is fully mixed with mixed solution, aerobic zone backflow mixed liquor and mud in oxygen-starved area; Then rising is to the anaerobic zone on upper strata, and in the middle of anaerobic zone and oxygen-starved area the obvious boundary line of nothing; The sewage self-flowing of anaerobic zone enters bottom, aerobic zone, and bottom, aerobic zone is membrane biological reaction district, the organic and excessive suction phosphorus in main degradation of sewage, top hangs elastic filler, now BOD significantly reduces, and the lower growth that is beneficial to nitrifier of BOD/TKN value, mainly carries out nitration reaction.When MBR membrane module top water level is at least 0.5m, (further determine that a preferred value is 2m), the pressure providing by high liquid level makes sewage see through MBR film, forms and produces water.MBR membrane module bottom is carried out aeration, prevents that active sludge is attached on film surface and water production rate is declined too fast in a large number, and provides sufficient dissolved oxygen for the aerobic reaction in elastic filler district, top.Aerobic zone is furnished with sludge reflux system, can distribute the sludge quantity that enters oxygen-starved area and anaerobic zone.
The feature of described inversion A/A/O technique is that mud and mixed-liquor return are merged into mud/mixed-liquor return pipe, and the pump inlet of mud/mixed-liquor return divides two arms, by manually-operated gate, regulates every arm uninterrupted.Mud/the mixed solution of mud/mixed-liquor return pump discharge can enter anaerobic zone by the anaerobic zone arm that refluxes, also can enter oxygen-starved area by the oxygen-starved area arm that refluxes, flow sensor and automatic regulating valve door are housed on arm, can automatically distribute the flow that enters anaerobic zone and oxygen-starved area mud/mixed solution.
Compared with prior art, the beneficial effects of the utility model are:
The utility model also has except possessing all advantages of conventional A/A/O+MBR combination process:
(1) adopt Dual-layer to arrange oxygen-starved area, anaerobic zone, aerobic zone, further reduce floor space;
(2) produce water and be unworthy of producing aerating apparatus that water pump, mud return line and mixed-liquor return pipe merge into a reflux line, bottom, membrane biological reaction district simultaneously for bottom MBR assembly and catalytic oxidation district, top provide pressurized air, and the mode by variable frequency adjustment rotation speed of fan is optimized aeration rate, thereby reduced energy consumption.
(3) make full use of the feature of each reaction zone and equipment, properly distributed is taken up an area space and is reduced to greatest extent energy consumption, and consumption reduction rate reaches 33% left and right, realizes the intensive of water treating equipment.
Below in conjunction with drawings and Examples, the utility model is further elaborated.
Accompanying drawing explanation
Fig. 1 is the structure principle chart of an embodiment of the utility model.
In the drawings
1-water inlet pipe; 2-oxygen-starved area flow deflector; 3-anaerobic zone flow deflector; 4-oxygen-starved area; 5-submersible agitator; 6-anaerobic zone; 7-aerobic zone flow deflector; 8-membrane biological reaction district; 9-MBR membrane module; 10-elastic filler; 11-catalytic oxidation district; 12-water producing pipe; 13-produces water flow sensor; 14-produces water pressure sensor; 15-produces water automatically controlled valve; 16-backwash pressure sensor; 17-backwash water pump; 18-backwash flow sensor; 19-backwash pipe; 20-aerating apparatus; 21-gas blower; 22-mud/mixed-liquor return pump; 23-shore pipe; 24-mud/mixed-liquor return pipe; 25-anaerobism return flow sensor; 26-anoxic return flow sensor; 27-anaerobism backflow self-acting valve; 28-anoxic backflow self-acting valve; 29-anaerobism backflow arm; 30-anoxic backflow arm; 31-DO on-line monitoring instrument; 32-liquid level sensor.
Embodiment
A kind of intensive denitrogenation dephosphorizing membrane biological reaction apparatus, as shown in Figure 1, adopt upper and lower two-layer inversion A/A/O+MBR combination process rebuilding, first sewage enter the oxygen-starved area 4 of bottom by guiding region, oxygen-starved area 4 is furnished with submersible agitator 5, and sewage is fully mixed with mixed solution, aerobic zone backflow mixed liquor and mud in oxygen-starved area; Then rising is to the anaerobic zone 6 on upper strata, and anaerobic zone 6 is middle without obvious boundary line with oxygen-starved area 4; The sewage self-flowing of anaerobic zone 6 enters bottom, aerobic zone, bottom, aerobic zone is for arranging the membrane biological reaction district of MBR membrane module 9, organic and excessive suction phosphorus in main degradation of sewage, top hangs elastic filler, now BOD significantly reduces, the lower growth that is beneficial to nitrifier of BOD/TKN value, mainly carries out nitration reaction.When MBR membrane module top water level is 1.5m, the pressure providing by high liquid level makes sewage see through MBR film, forms and produces water.MBR membrane module bottom is carried out aeration, prevents that active sludge is attached on film surface and water production rate is declined too fast in a large number, and provides sufficient dissolved oxygen for the aerobic reaction in elastic filler district, top.Aerobic zone is furnished with sludge reflux system, can distribute the sludge quantity that enters oxygen-starved area and anaerobic zone.
Oxygen-starved area 4 arranges flow deflector 2, and anaerobic zone 6 arranges flow deflector 3, and aerobic zone arranges flow deflector 7; Place bottom, aerobic zone, and top, aerobic zone hangs elastic filler 10.
The power that produces water comes from the pressure that the MBR membrane module 9 tops water level that at least 0.5m is high produces.On water producing pipe 12, be furnished with flow sensor 13, pressure transmitter 14 and autocontrol valve 15, can make to produce discharge adjustable, and whether automatic decision need to carry out backwash.
The water inlet pipe that enters this reaction unit needs configuration flow quantity sensor, regulates the flow of raw water pump by frequency transformer, and the flow of water inlet pipe flow sensor and water producing pipe flow sensor is consistent.Constant to guarantee MBR membrane module top water level.
According to the feature of inversion A/A/O technique, mud and mixed-liquor return are merged into mud/mixed- liquor return pipe 24,22 imports of mud/mixed-liquor return pump divide two arms, by manually-operated gate, regulate every arm uninterrupted.Mud/the mixed solution of mud/mixed-liquor return pump 22 outlet can enter anaerobic zone 6 by the anaerobic zone arm 29 that refluxes, also can enter oxygen-starved area 4 by the oxygen-starved area arm 30 that refluxes, flow sensor 25,26 and automatic regulating valve door 27,28 are housed on every arm, can automatically distribute the flow that enters anaerobic zone and oxygen-starved area mud/mixed solution.
First sewage enter oxygen-starved area 4, and it is carbon source that microorganism utilizes organism in water inlet, and the nitric nitrogen denitrification that backflow mixed liquor/mud is brought forms N
2or N
xo
yescape to atmosphere, reach denitrogenation object, bottom, oxygen-starved area is furnished with submersible agitator 5, and sewage is fully mixed with mixed solution, aerobic zone backflow mixed liquor and mud in oxygen-starved area, and then rising is to the anaerobic zone 6 on upper strata.In anaerobic zone 6, oxygen in water and nitric nitrogen have all been exhausted in anaerobic state in conjunction with oxygen, poly-phosphorus microorganism utilizes poly-phosphorus in born of the same parents to decompose the easy degraded COD in the energy absorption sewage producing, discharge phosphoric acid salt simultaneously, through the sewage self-flowing of anaerobic reaction, enter the membrane biological reaction district 8 of bottom, aerobic zone, the organic and excessive suction phosphorus in main degradation of sewage; 11, catalytic oxidation district BOD to top, aerobic zone significantly reduces, and the lower growth that is beneficial to nitrifier of BOD/TKN value, mainly carries out nitration reaction.Oxygen-starved area 4, anaerobic zone 6 there is no strict boundary, depend primarily on the form of technique structures employing and the effect of Prepositive denitrification.
Membrane biological reaction district is furnished with aerating apparatus 20 in 8 bottoms, by gas blower 21, provides pressurized air, for washing away the active sludge of MBR film surface adhesion and providing dissolved oxygen for top layer catalytic oxidation district 11.
The higher sludge concentration in membrane biological reaction district 8 not only wins the nitrated needed reaction volume of Aerobic Pond from fixing biochemical reaction pool volume, and the anoxic microenvironment of active sludge flco inside makes nitrification and denitrification process just synchronously carry out in the period at aeration, thereby created condition for the nitric efficiency of further raising system.
Process the water yield: certain office building sanitary sewage 100m
3/ d.
Influent quality: COD:500 ~ 600mg/L, BOD:200 ~ 300mg/L, TN:50 ~ 60mg/L, TP:4 ~ 6mg/L, SS:200 ~ 300mg/L.
Design variable and operational conditions: the oxygen-starved area residence time 3 ~ 4h, submersible agitating acc power 5w/m
2; The anaerobic zone residence time 3 ~ 4h; The membrane biological reaction district residence time 6 ~ 8h, takes out and stops than 8min/2min, and MBR membrane module adopts curtain formula hollow fiber film assembly, model FP-A IV; 5 ~ 6 hours catalytic oxidation district residence time, elastic filler specification: 150 * 1500; Aerobic zone gas-water ratio 18:1, blower power: 2.2kw, aerobic zone dissolved oxygen 2 ~ 4mg/L, mud/return current ratio of the mixed liquid 200 ~ 300%, sludge age 8 ~ 20d.Mud/mixed-liquor return pump merit 0.55kw.
Effluent quality: COD≤50mg/L, BOD≤10mg/L, TN≤15mg/L, TP≤1mg/L, SS≤10mg/L.
Floor space: the utility model adopts inversion A/A/O+MBR technique to press rebuilding, more conventional A/A/O+MBR technique is saved and is taken up an area 30% left and right.
Power consumption: the power consumption maximum value of ton water is 0.67kw.h/m
3, conventional A/A/O+MBR ton water power consumption is about 1 kw.h/m
3, save power consumption approximately 33%.
Automatically control explanation: equipment running process comprise into water, filtration, filtration stop, backwash, standby.In operational process, except emptying, spoil disposal and MBR membrane module system, flooding to clean needs outside manual intervention, and other can move automatically, also can manual operation operation.Operation interface adopts touch-screen.
Enter the water inlet pipe configuration flow quantity sensor of this reaction unit, by frequency transformer, regulate the flow of raw water pump, the flow of water inlet pipe flow sensor and water producing pipe flow sensor is consistent.To guarantee that MBR membrane module top water level is between 0.5 ~ 2.5m.
MBR membrane filtration adopts continuous aeration, and intermittently the mode of water outlet, takes out and stop than 8min/2min, and flow sensor and autocontrol valve are installed in water producing pipe road, realizes constant flow and filters.While stopping water outlet, carry out automatic clear water backwash, backwash time 30 ~ 60s.
Guarantee water producing pipe pressure <50kpa, otherwise water producing pipe automatic valve is closed, whether artificial decision carries out online medicament backwash.
Gas blower is variable frequency control, can suitably reduce or increase aeration rate according to the variation of dissolved oxygen, but aeration rate can not be 0.When stopping, blower fan can cause closing of water producing pipe automatic valve.
The content that above-described embodiment is illustrated should be understood to these embodiment only for being illustrated more clearly in the utility model, and be not used in restriction scope of the present utility model, after having read the utility model, those skilled in the art all fall within the application's claims limited range to the modification of the various equivalent form of values of the present utility model.
Claims (8)
1. an intensive denitrogenation dephosphorizing membrane biological reaction apparatus, comprises inverted A/A/O reaction tank; It is characterized in that, described inverted A/A/O reaction tank comprises anoxic anaerobic pond and MBR membrane biological reaction pond, wherein in anoxic anaerobic pond, be provided with polylith water inlet is directed to the flow deflector (2 at the bottom of anoxic anaerobic pond pond, 3), this anoxic anaerobic pond is divided into oxygen-starved area (4) and anaerobic zone (6) from bottom to up; Described oxygen-starved area (4) is communicated with water inlet pipe (1), and the water outlet of described anaerobic zone (6) is communicated with MBR membrane biological reaction pond; In described MBR membrane biological reaction pond, be provided with water inlet is directed to MBR membrane biological reaction pond Chi Di aerobic zone flow deflector (7), in this MBR membrane biological reaction pond, be provided with the membrane biological reaction district (8) that is positioned at bottom, pond and the catalytic oxidation district (11) that is positioned at top, pond; In described membrane biological reaction district (8), be provided with MBR membrane module (9), in described catalytic oxidation district (11), be provided with filler (10); The mud mouth of bottom, described MBR membrane biological reaction pond and the mixed solution mouth on top, MBR membrane biological reaction pond are all connected with a shore pipe (23) by mud/mixed-liquor return pump (22), this shore pipe (23) is communicated with oxygen-starved area (4) and anaerobic zone (6) of anoxic anaerobic pond respectively by corresponding arm (30,29); The water outlet of described MBR membrane module (9) is communicated with water producing pipe (12).
2. intensive denitrogenation dephosphorizing membrane biological reaction apparatus according to claim 1, is characterized in that, the top in described MBR membrane biological reaction pond is provided with DO on-line detector (31) and liquid level sensor (32).
3. intensive denitrogenation dephosphorizing membrane biological reaction apparatus according to claim 1, is characterized in that, described water producing pipe (12) is provided with flow sensor (13), pressure transmitter (14) and control valve (15); Described water producing pipe (12) is connected with backwash water pump (17) by backwash pipe (19), and this backwash pipe (19) is provided with flow sensor (18), pressure transmitter (19) and control valve; Described water inlet pipe is equipped with flow sensor on (1).
4. intensive denitrogenation dephosphorizing membrane biological reaction apparatus according to claim 1, is characterized in that, described arm (30,29) is anaerobism backflow arm (29) and anoxic backflow arm (30); Flow sensor (25) and control valve (27) are housed on described anaerobism backflow arm (29), flow sensor (26) and control valve (28) are housed on described anoxic backflow arm (30).
5. intensive denitrogenation dephosphorizing membrane biological reaction apparatus according to claim 1, is characterized in that, the oxygen-starved area of described anoxic anaerobic pond (4) bottom is provided with submersible agitator (5).
6. intensive denitrogenation dephosphorizing membrane biological reaction apparatus according to claim 1, is characterized in that, the bottom in described MBR membrane biological reaction pond is provided with the aerating apparatus (20) being connected with gas blower (21).
7. intensive denitrogenation dephosphorizing membrane biological reaction apparatus according to claim 1, is characterized in that, described filler (10) is elastic filler; Described MBR membrane module (9) is curtain formula hollow fiber film assembly.
8. intensive denitrogenation dephosphorizing membrane biological reaction apparatus according to claim 1, is characterized in that, when the water level on described MBR membrane module (9) top is at least 0.5m, water producing pipe (12) produces water.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103435231A (en) * | 2013-09-05 | 2013-12-11 | 中国水电顾问集团中南勘测设计研究院 | Intensive nitrogen-phosphorus removing membrane biological reaction device and sewage treatment method |
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2013
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103435231A (en) * | 2013-09-05 | 2013-12-11 | 中国水电顾问集团中南勘测设计研究院 | Intensive nitrogen-phosphorus removing membrane biological reaction device and sewage treatment method |
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Owner name: CHINA POWER GROUP ZHONGNAN INVESTIGATION DESIGN + Free format text: FORMER NAME: HYDROCHINA ZHONGNAN ENGINEERING CORPORATION Owner name: HYDROCHINA ZHONGNAN ENGINEERING CORPORATION Free format text: FORMER NAME: ZHONGNAN PROSPECTING DESIGN INST. CHINA HYDRAUELECTRIC CONSULTANT GROUP |
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| CP01 | Change in the name or title of a patent holder |
Address after: 410014 Hunan province Changsha Yuhua District, camphor Road No. 16 Patentee after: POWERCHINA ZHONGNAN ENGINEERING Corp.,Ltd. Patentee after: Hunan Chenzhou Guoshui Water Treatment Co.,Ltd. Address before: 410014 Hunan province Changsha Yuhua District, camphor Road No. 16 Patentee before: HYDROCHINA ZHONGNAN ENGINEERING Corp. Patentee before: Hunan Chenzhou Guoshui Water Treatment Co.,Ltd. |
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Address after: 410014 Hunan province Changsha Yuhua District, camphor Road No. 16 Patentee after: HYDROCHINA ZHONGNAN ENGINEERING Corp. Patentee after: Hunan Chenzhou Guoshui Water Treatment Co.,Ltd. Address before: 410014, 9 camphor Road, Yuhua District, Hunan, Changsha Patentee before: Mid-South Hydroelectric Investigation & Design Institute of China Hydropower Engineering Consulting Group Patentee before: Hunan Chenzhou Guoshui Water Treatment Co.,Ltd. |
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