CN203112666U - Hybrid dynamic membrane bioreactor - Google Patents
Hybrid dynamic membrane bioreactor Download PDFInfo
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- CN203112666U CN203112666U CN 201320118517 CN201320118517U CN203112666U CN 203112666 U CN203112666 U CN 203112666U CN 201320118517 CN201320118517 CN 201320118517 CN 201320118517 U CN201320118517 U CN 201320118517U CN 203112666 U CN203112666 U CN 203112666U
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Abstract
The utility model relates to a hybrid dynamic membrane bioreactor. The bioreactor is formed by sequentially communicating an anaerobic zone (1), an anoxic zone (2) and a dynamic membrane biological reaction zone (3) and suspended biological stuffing (15) is arranged in the anaerobic zone (1), the anoxic zone (2) and the dynamic membrane biological reaction zone (3); a diving mixer I (13) is arranged on the side wall of the anaerobic zone (1); a diving mixer II (14) is arranged on the side wall of the anoxic zone (2); both ends of the side wall shared by the anaerobic zone (1) and the anoxic zone (2) are respectively provided with a first water through hole (5) and a wall through reflux pump (6); both ends of the side wall shared by the anoxic zone (2) and the dynamic membrane biological reaction zone (3) are respectively provided with a second water through hole (8) and a third water through hole (9); and the second water through hole (8) and the third water through hole (9) are respectively formed at the top and at the bottom of the side wall. The bioreactor is mainly used for treating and recycling domestic sewage and industrial wastewater and solves the problem of membrane pollution.
Description
Technical field
The utility model relates to sewage and waste water treatment device, particularly processing and the reuse of sanitary sewage (comprising city, samll cities and towns and domestic sewage in rural areas by using), trade effluent (comprising high ammonia nitrogen organic industrial sewage).
Background technology
Composite bioreactor (HBR) is by suspension growth microorganism and the coefficient bio-reactor of apposition growth microorganism.The microorganism sludge age of apposition growth is longer in the composite bioreactor, is conducive to the nitrifier biological growth; The microorganism of suspension growth can be controlled at short sludge age state, and is in anaerobism, anoxic, aerobic environment repeatedly, is conducive to biological phosphate-eliminating.Composite bioreactor can be taken into account the requirement of biological denitrificaion and biological phosphate-eliminating preferably, but still has the problems such as the difficult precipitation of the difficult microbial film of cultivating and coming off of microorganism of suspension growth.
Membrane bioreactor (MBR) technology is the combination of dirty water living creature processing technique and membrane separation technique.Sewage in reactor through biological treatment finish to the decomposition of organic pollution materials with transform after, utilize the high efficiency separation of microfiltration membrane (MF) or ultra-filtration membrane (UF) to finish the solid-liquid separation of sewage, thereby reach decontamination effect improving.Be arranged at membrane module in the reactor and can replace second pond in the traditional technology and conventional filtration, absorbing unit fully, hydraulic detention time (HRT) is separated fully with sludge age (SRT), and obtain effluent quality stable, high-quality.
Because MBR has advantages such as effluent quality is good, floor space is little, surplus sludge volume is few, has been widely used in processing and the reuse of municipal wastewater, trade effluent.But problem such as easy film pollution, mould material cost height, flux are low, film fracture of wire that MBR still exists.In recent years, (dynamic membrane bioreactor DMBR) handles sanitary sewage and has been subjected to extensive concern to use the bioreactor of dynamic membrane that cheap microgrid base material makes.Chinese scholars has been carried out relevant research, aspects such as operation control in optimization, preparation condition and the operational conditions of film base material material have obtained good effect, can reach and membrane bioreactor (membrane bioreactor, MBR) treatment effect of technology same level.But the flux of Dynamic Membrane descends very fast, and membrane pollution problem still is that bioreactor of dynamic membrane steady running has key issue to be solved.
The number of patent application that the applicant has applied for is 201210347255.6, discloses a kind of mud film symbiosis combined film bioreactor, comprises anaerobic baffled unit (1), anoxic unit (2), catalytic oxidation unit (3) and membrane biological reaction unit (4); The applicant further optimizes in conjunction with the characteristics of original patent and bioreactor of dynamic membrane, and it is suitable with former patent to have invented a kind for the treatment of effect, but the lower sewage and waste water treatment device of cost.
The utility model content
But the utility model is intended to provide a kind of effluent quality good and reuse, and synchronous denitrification dephosphorizing is effective, and the preventing membrane pollution ability is strong, energy consumption is low, the volumetric loading height, stable, the composite dynamic film bio-reactor of less investment (being called for short the HBR-DMBR reactor).
For addressing the above problem, technical solutions of the utility model are:
A kind of composite dynamic film bio-reactor is communicated with successively by anaerobic zone, oxygen-starved area and dynamic film bio reaction zone and forms, and is equipped with suspended biological filler in anaerobic zone, oxygen-starved area and the dynamic film bio reaction zone;
On the described anaerobic zone sidewall diving mixer I is installed; On the sidewall of described oxygen-starved area the diving mixer II is installed; Be respectively arranged with I water hole and reflux pump through walls at the shared sidewall two ends of anaerobic zone and oxygen-starved area; The sidewall two ends that share at oxygen-starved area and dynamic film bio reaction zone are respectively equipped with II water hole and III water hole, and II water hole and III water hole are separately positioned on top side wall and bottom;
Described dynamic film bio reaction zone inside is provided with at least one group of dynamic film group device, and the film group device top is provided with rising pipe, and this rising pipe is provided with suction pump; Dynamically the film group device bottom is provided with the boring aeration device, and dynamically the boring aeration device of film group device bottom is connected with airduct, and airduct is provided with pulse valve; The dynamic film bio reaction zone is provided with shore pipe at the bottom of the pond, and this shore pipe is connected with sludge pump.
Described dynamic film group device preferably is made up of many groups dynamic film component, has the cavity that is made of back up pad in the dynamic film component, and the cavity top is communicated with rising pipe; The outside of back up pad is provided with film base material.Described film base material is preferably non-woven fabrics.
Described I water hole and reflux pump through walls place preferably are provided with screen cloth.
Suspended biological filler preferably adopts the urethane biologic packing material.
Described screen cloth preferably adopts corrosion-resistant materials such as stainless steel, glass reinforced plastic, urethane.
Described diving mixer II is preferably installed towards the direction of III water hole; Purpose is: the part kinetic energy that can provide mud mixture to circulate in " oxygen-starved area → dynamic film bio reaction zone → oxygen-starved area ".
Below the utility model is done further explanation and explanation:
In the described anaerobic zone suspended biological filler is arranged, suspended biological filler mainly provides the carrier of microorganism growth and gathering.Anaerobic zone one sidewall is installed diving mixer, and diving mixer mainly plays the mixing stirring action.On anaerobic zone and the oxygen-starved area share common sidewalls reflux pump through walls is installed, reflux pump through walls mainly provides the oxygen-starved area mud mixture to the required kinetic energy of anaerobic zone.Sewage enters anaerobic zone by water inlet pipe and mixes with the mud mixture that refluxes by reflux pump through walls.Anaerobic zone generation anaerobic hydrolysis and anaerobic phosphorus release reaction.After the anaerobic zone reaction, mud mixture flows into the oxygen-starved area certainly by the I water hole.The equal preferred vertical of I water hole and reflux pump through walls place is provided with screen cloth, and screen cloth works to cut off anaerobic zone and oxygen-starved area suspended biological filler.
In the described oxygen-starved area suspended biological filler is arranged, suspended biological filler mainly provides the carrier of microorganism growth and gathering.Oxygen-starved area one sidewall is installed diving mixer, and diving mixer mainly plays the mixing stirring action, and diving mixer is towards the III water hole, the part kinetic energy that can provide mud mixture to circulate in " oxygen-starved area → dynamic film bio reaction zone → oxygen-starved area ".Oxygen-starved area part mud mixture flows into the dynamic film bio reaction zone by the III water hole, and another part is back to anaerobic zone by reflux pump through walls.
Described dynamic film bio reaction zone inside is provided with at least one group of dynamic film group device, and dynamically film group device adopts the water outlet of suction pump negative pressure-pumping.Dynamically film group device is made up of many groups dynamic film component, and dynamic film component is made up of back up pad and film base material, and film base material is preferably non-woven fabrics.Microorganism can produce various organism in metabolic process, when mixed solution saw through the film base material of porous, these organic metabolites and microorganism itself can have the Dynamic Membrane of filtration capacity on the surface of film base material by formation such as absorption, adhesion, depositions.Dynamically the film group device bottom is provided with the boring aeration device, and the boring aeration device of every group of film group device bottom connects airduct, and airduct is provided with pulse valve, adopts the pulse aeration.The pulse aeration works the function of washing away membrane module face dirt, has the characteristics of less energy-consumption simultaneously.In the dynamic film bio reaction zone suspended biological filler is arranged, suspended biological filler can also play the effect of cleaning membrane module face dirt except the carrier of microorganism growth and gathering is provided under the washing away of aeration.The partially mixed liquid of bioreactor of dynamic membrane is back to the oxygen-starved area by the II water hole.The dynamic film bio reaction zone is provided with shore pipe at the bottom of the pond, and this shore pipe is connected with sludge pump.
Compared with prior art, the utlity model has following advantage:
1, adopts suspended biological filler, directly throw in, need not fix, have characteristics such as biological attachment power is strong, specific surface area is big, surplus sludge volume is few.Suspended biological filler has the effect of cleaning bioreactor of dynamic membrane face Dynamic Membrane under the stirring of aeration, keep the Dynamic Membrane certain thickness, has reduced the film obstruction, has increased filtration cycle.Simultaneously, because the effects such as absorption of suspended biological filler, this device can be controlled lower suspended sludge concentration (MLSS) and extracellular polymeric (EPS) concentration, reaches to slow down the purpose that the dynamic film component film pollutes.
2, adopt the dynamic biological membrane technique, utilize cheap microgrid base material to make membrane module, the microgrid base material plays the dual function of biofilm carrier and membrane filtration.Bioreactor of dynamic membrane is compared and is utilized the membrane bioreactor cost of fixedly mould material manufacturing lower, and filtration pressure difference is lower.
3, this device adopts the pulse aeration can reduce the DMBR aeration energy consumption, and the while can satisfy the microorganism oxygen requirement and film washes away condition, keeps the higher cross-flow velocity of face, alleviates film and pollutes.
Description of drawings
Fig. 1 is the two dimensional structure synoptic diagram of composite dynamic film bio-reactor 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 structural representation of dynamic film component 11;
In the drawings, 1-anaerobic zone; The 2-oxygen-starved area; 3-dynamic film bio reaction zone; The 4-water inlet pipe; 5-I water hole; 6-reflux pump through walls; The 7-screen cloth; 8-II water hole; 9-III water hole; The dynamic film group device of 10-; The 11-dynamic film component; The 12-rising pipe; 13-diving mixer I; 14-diving mixer II; The 15-suspended biological filler; 16-boring aeration device; The 17-pulse valve; The 18-shore pipe; The 19-sludge pump; The 20-suction pump; The 21-cavity; 22-Dynamic Membrane base material; The 23-back up pad.
Embodiment
In conjunction with the accompanying drawings and embodiments the utility model is described further down.
By Fig. 1～Fig. 4 as can be known, a kind of composite dynamic film bio-reactor is communicated with successively by anaerobic zone 1, oxygen-starved area 2 and dynamic film bio reaction zone 3 and forms; The flow direction of mixed solution or current in the arrow Indicator Reaction pond among the figure.
One side wall upper part of described anaerobic zone 1 is provided with water inlet pipe 4; Anaerobic zone 1 is communicated with oxygen-starved area 2 by I water hole 5, and wherein I water hole 5 is arranged on anaerobic zone and oxygen-starved area share common sidewalls one end, and the other end arranges reflux pump 6 through walls; Suspended biological filler 15 is arranged in the anaerobic zone 1; Anaerobic zone 1 one sidewalls are installed diving mixer 13;
There are suspended biological filler 15, one sidewalls that diving mixer 14 is installed in the described oxygen-starved area 2; Oxygen-starved area 2 is communicated with dynamic film bio reaction zone 3 by III water hole 9, and wherein III water hole 9 is arranged on the bottom of shared sidewall one end of oxygen-starved area 2 and dynamic film bio reaction zone 3; Oxygen-starved area 2 arranges II water hole 8 with the top of the dynamic film bio reaction zone 3 share common sidewalls the other ends;
Described dynamic film bio reaction zone 3 inside are provided with at least one group of dynamic film group device 10, and the film group device top is provided with rising pipe 12, and this rising pipe is provided with suction pump 20; Dynamically film group device 10 bottoms are provided with boring aeration device 16, and the boring aeration device 16 of every group of dynamic film group device bottom connects airduct, and airduct is provided with pulse valve 17; The dynamic film bio reaction zone is provided with shore pipe 18 at the bottom of 3 ponds, and this shore pipe 18 is connected with sludge pump 19.Suspended biological filler 15 is arranged in the dynamic film bio reaction zone 3.
Described I water hole 5 and reflux pump through walls 6 places all are vertically installed with screen cloth 7.
Described dynamic film group device 10 is made up of many groups dynamic film component 11, has the cavity 22 that is made of back up pad 23 in the dynamic film component 11, and cavity 22 tops are communicated with rising pipe 12; The outside of back up pad 23 is provided with film base material 22.
The principle of work of said apparatus is:
Enter anaerobic zone through front end pretreated dirty waste water (as sanitary sewage through processing such as grid, sand settings), sewage is mixing with suspended biological filler and the mud mixture that refluxes of oxygen-starved area in the anaerobic zone under the stirring of stirrer.Excellent contact and mass transfer take place with the microorganism of the microorganism that is attached to suspended biological filler and suspension growth in pollutants in sewage.Microorganism under anaerobic environment with sewage in the larger molecular organics acidication be small organic molecule, improve Biodegradability of Wastewater.PolyP bacteria under anaerobic discharges the phosphorus of excessive absorption, and inhaling phosphorus for follow-up good oxygen excess provides condition.
In the described oxygen-starved area suspended biological filler is arranged, a sidewall is installed diving mixer; The oxygen-starved area is communicated with the dynamic film bio reaction zone by the III water hole, and wherein the III water hole is arranged on the bottom of shared sidewall one end of oxygen-starved area and dynamic film bio reaction zone; The top of oxygen-starved area and the dynamic film bio reaction zone share common sidewalls the other end arranges the II water hole.The muddy water of dynamic film bio reaction zone flows because aeration makes progress, simultaneously since the density of dynamic film bio reaction zone mixed solution less than the density of oxygen-starved area mixed solution, flow to the oxygen-starved area so will produce dynamic film bio reaction zone mixed solution by the II water hole, and the oxygen-starved area mixed solution will flow to the dynamic film bio reaction zone by the III water hole, so constantly circulate.In the oxygen-starved area, nitrate nitrogen will become nitrogen by anti-nitration reaction, finish denitrogenation.Organism in the anaerobic zone water outlet can provide anti-nitration reaction required carbon source.The oxygen-starved area arranges reflux pump through walls, and an oxygen-starved area water outlet part is back to anaerobic zone, because the denitrification of oxygen-starved area, the nitric nitrogen concentration that passes back into the anaerobic zone mud mixture is very low, greatly reduces nitric nitrogen is released phosphorus reaction to anaerobic zone detrimentally affect.
Described dynamic film bio reaction zone inside is provided with at least one group of dynamic film group device, and dynamically film group device is made of many groups dynamic film component; The film group device bottom is provided with the boring aeration device, and the boring aeration device of every group of film group device bottom connects airduct, and airduct is provided with pulse valve.Dynamically the aeration of film group device adopts the pulse aeration mode, and aeration provides aerobic microbiological requisite oxygen amount, plays the effect of washing away the membrane module face simultaneously.The dynamic film bio reaction zone is provided with shore pipe at the bottom of the pond, and this shore pipe is connected with sludge pump.In the dynamic film bio reaction zone suspended biological filler is arranged.The dynamic film bio reaction zone mainly carries out the reactions such as excessive absorption of nitrated, phosphorus of aerobic degradation, the ammonia nitrogen of COD.
Described anaerobic zone, oxygen-starved area and dynamic film bio reaction zone all add suspended biological filler, and suspended biological filler preferably adopts the urethane biologic packing material.Suspended biological filler provides the carrier of microorganism growth and gathering, can improve the microorganism total amount under lower suspended sludge concentration, increases to handle load.The floating stuffing of dynamic film bio reaction zone can also be cleaned dynamic film component under the effect of aeration, keeps dynamic biological film certain thickness, has reduced the film obstruction, has increased filtration cycle.
Carry out sewage disposal and recycling method processing sanitary sewage with above-mentioned composite dynamic film bio-reactor, working process is:
(1) sewage enters anaerobic zone by water inlet pipe and finishes the acidication reaction, finishes the anaerobic phosphorus release reaction simultaneously, control anaerobic zone dissolved oxygen≤0.2mg/L;
(2) the anaerobic zone water outlet enters the oxygen-starved area reaction, control oxygen-starved area dissolved oxygen≤0.5mg/L; An oxygen-starved area water outlet part (mixed solution) is back to anaerobic zone, control reflux ratio 25%-100%, and another part enters the dynamic film bio reaction zone.
(3) open dynamic film group device suction pump, dynamically film group device will filter mixed solution.The initial stage Dynamic Membrane does not form as yet, and dynamically film group device effluent SS concentration is higher, and effluent recycling is to the dynamic film bio reaction zone.Along with constantly carrying out of filtering, the film base material surface will form the Dynamic Membrane with filtering function gradually, and can aspirate water outlet this moment normally.
Control dynamic film bio reaction zone dissolved oxygen 2mg/L-6mg/L, suspended sludge concentration 2000 mg/L～3000 mg/L; Organism in the dirty waste water is degraded by microbiological oxidation at the dynamic film bio reaction zone, and ammonia nitrogen is oxidized to nitrate nitrogen or nitrite nitrogen; Soluble phosphate is obtained cutting down by spoil disposal by the excessive absorption of microorganism; The dynamic film bio reaction zone adopts pulse valve control air quantity, carries out the pulse aeration to reduce aeration energy consumption, average gas-water ratio≤15:1; The water outlet of dynamic film bio reaction zone is extracted out from the membrane module top by suction pump; The muddy water mixed solution (nitrification liquid) that the dynamic film bio reaction zone contains nitrite or nitrate nitrogen is partly refluxed to the oxygen-starved area and carries out anti-nitration reaction, control reflux ratio 50%-200%, and wherein nitrite or nitrate nitrogen denitrification becomes nitrogen, finishes denitrogenation.
Wherein, influent quality: COD mean value 298.2mg/L, BOD
5Mean value 106.4mg/L, NH
3-N mean value 24.8mg/L, TP mean value 1.68mg/L.
Effluent quality: COD mean value 28.4mg/L, BOD
5Mean value 5.8mg/L, NH
3-N mean value 2.0mg/L, TP mean value 0.42mg/L, SS mean value 4.8mg/L." urban sewage reutilization city, city miscellaneous water water quality " (GBT 18920-2002) city miscellaneous water water quality standard is satisfied in water outlet after sterilizing, but reuse is as this subdistrict greening water or flushing supply.
Clearance: COD 90.5%, BOD
594.5%, NH
3-N 91.9%, and TP 75.0%.
Operation process condition: the hydraulic detention time 1.2h of anaerobic zone (1), dissolved oxygen≤0.2mg/L; The hydraulic detention time 1.5h of oxygen-starved area (2), dissolved oxygen≤0.5mg/L; The hydraulic detention time 4h of dynamic film bio reaction zone (3), dissolved oxygen 2-6mg/L, suspended sludge concentration 2000～3000 mg/L, average gas-water ratio≤15:1.
Claims (6)
1. composite dynamic film bio-reactor, it is characterized in that, be communicated with successively by anaerobic zone (1), oxygen-starved area (2) and dynamic film bio reaction zone (3) and form, and be equipped with suspended biological filler (15) in anaerobic zone (1), oxygen-starved area (2) and the dynamic film bio reaction zone (3);
On described anaerobic zone (1) sidewall diving mixer I (13) is installed; On the sidewall of described oxygen-starved area (2) diving mixer II (14) is installed; Be respectively arranged with I water hole (5) and reflux pump through walls (6) at anaerobic zone (1) and oxygen-starved area (2) shared sidewall two ends; The sidewall two ends that (2) and dynamic film bio reaction zone (3) share in the oxygen-starved area are respectively equipped with II water hole (8) and III water hole (9), and II water hole (8) and III water hole (9) are separately positioned on top side wall and bottom;
Described dynamic film bio reaction zone (3) inside is provided with at least one group of dynamic film group device (10), and film group device (10) top is provided with rising pipe (12), and this rising pipe (12) is provided with suction pump; Dynamically film group device (10) bottom is provided with boring aeration device (16), and dynamically the boring aeration device of film group device (10) bottom is connected with airduct, and airduct is provided with pulse valve (17); Dynamic film bio reaction zone (3) is provided with shore pipe (18) at the bottom of the pond, and this shore pipe (18) is connected with sludge pump (19).
2. according to the described a kind of composite dynamic film bio-reactor of claim 1, it is characterized in that, described dynamic film group device (10) is made up of many groups dynamic film component (11), has the cavity that is made of back up pad (23) in the dynamic film component (11), and the cavity top is communicated with rising pipe (12); The outside of back up pad (23) is provided with film base material (22).
3. according to the described a kind of composite dynamic film bio-reactor of claim 2, it is characterized in that described film base material (22) is non-woven fabrics.
4. according to claim 1 or 2 described a kind of composite dynamic film bio-reactors, it is characterized in that described I water hole (5) and reflux pump through walls (6) locate to be provided with screen cloth (7).
5. according to claim 1 or 2 described a kind of composite dynamic film bio-reactors, it is characterized in that described suspended biological filler (15) is the urethane biologic packing material.
6. according to claim 1 or 2 described a kind of composite dynamic film bio-reactors, it is characterized in that described diving mixer II (14) is installed towards the direction of III water hole (9).
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| CN 201320118517 CN203112666U (en) | 2013-03-15 | 2013-03-15 | Hybrid dynamic membrane bioreactor |
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| CN 201320118517 CN203112666U (en) | 2013-03-15 | 2013-03-15 | Hybrid dynamic membrane bioreactor |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104003588A (en) * | 2014-06-19 | 2014-08-27 | 江西省恩皓环保有限公司 | MBR film compound system for conducting processing by enabling organisms to be attached to reaction water |
| CN107804911A (en) * | 2017-11-22 | 2018-03-16 | 王金龙 | A kind of reinforced sewage total nitrogen removes System and method for |
| CN108751624A (en) * | 2018-08-20 | 2018-11-06 | 深圳市南科环保科技有限公司 | A kind of method of the municipal decentralized wastewater of processing and combinations thereof equipment |
| CN109650655A (en) * | 2018-12-28 | 2019-04-19 | 安徽国祯环保节能科技股份有限公司 | A kind of SBBR integrated apparatus handled for high ammonia nitrogen rural area and Small Town Wastewater |
-
2013
- 2013-03-15 CN CN 201320118517 patent/CN203112666U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104003588A (en) * | 2014-06-19 | 2014-08-27 | 江西省恩皓环保有限公司 | MBR film compound system for conducting processing by enabling organisms to be attached to reaction water |
| CN104003588B (en) * | 2014-06-19 | 2015-07-08 | 江西省恩皓环保有限公司 | MBR film compound system for conducting processing by enabling organisms to be attached to reaction water |
| CN107804911A (en) * | 2017-11-22 | 2018-03-16 | 王金龙 | A kind of reinforced sewage total nitrogen removes System and method for |
| CN107804911B (en) * | 2017-11-22 | 2020-07-03 | 王金龙 | Sewage reinforced total nitrogen removal system and method |
| CN108751624A (en) * | 2018-08-20 | 2018-11-06 | 深圳市南科环保科技有限公司 | A kind of method of the municipal decentralized wastewater of processing and combinations thereof equipment |
| CN109650655A (en) * | 2018-12-28 | 2019-04-19 | 安徽国祯环保节能科技股份有限公司 | A kind of SBBR integrated apparatus handled for high ammonia nitrogen rural area and Small Town Wastewater |
| CN109650655B (en) * | 2018-12-28 | 2021-12-17 | 中节能国祯环保科技股份有限公司 | SBBR integrated device for sewage treatment of high-ammonia-nitrogen rural areas and small towns |
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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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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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| CP03 | Change of name, title or address |
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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Granted publication date: 20130807 |