CN103408183A - Multi-stage water purification subsurface flow wetland treatment system and sewage treatment process - Google Patents

Multi-stage water purification subsurface flow wetland treatment system and sewage treatment process Download PDF

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Publication number
CN103408183A
CN103408183A CN2013100957723A CN201310095772A CN103408183A CN 103408183 A CN103408183 A CN 103408183A CN 2013100957723 A CN2013100957723 A CN 2013100957723A CN 201310095772 A CN201310095772 A CN 201310095772A CN 103408183 A CN103408183 A CN 103408183A
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module
water
level
aerobic
water purification
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陆健健
施永祺
王强
裴茂青
黄思维
张海燕
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施永祺
陆健健
王强
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Priority to CN2013100957723A priority Critical patent/CN103408183A/en
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Abstract

The invention discloses a multi-stage water purification subsurface flow wetland treatment system, comprising a sedimentation tank, a clean water tank, a water pump and at least one wetland unit, wherein the wetland unit is provided with a hard container; an anaerobic filtration module, an aerobic adsorption module and a microbial module are arranged in the hard container; the anaerobic filtration module is in parallel alignment to and communicated with the aerobic adsorption module; the effective volume of each of the anaerobic filtration module and the aerobic adsorption module is 1/2 that of the microbial module; the aerobic adsorption module is communicated with the microbial module; a water level control groove is formed outside an accommodating groove; a water purification carbon core is arranged in the water level control groove; a water level controller is mounted on the wall of the water level control groove. The process steps are that sewage enters the anaerobic filtration module after being pretreated by a grille pond and the sedimentation tank, enters the aerobic adsorption module through upstream flow, enters the microbial module through downstream flow and finally parallelly flows through the water purification carbon core to enter the water level control groove. The multi-stage water purification subsurface flow wetland treatment system has the advantages of high water purification efficiency, stable water purification effect, long service life and small occupied area, and is convenient to update, maintain and operate.

Description

Multistage water purification undercurrent wetland processing system and sewage treatment process
Technical field
The present invention relates to technical field of sewage, particularly a kind of multistage water purification undercurrent wetland processing system and sewage treatment process.
Background technology
At present, it is more and more that artificial swamp is applied to the engineering of sewage disposal.Artificial swamp mainly is comprised of layer of plants, packing layer, microorganism layer three part, and artificial swamp mainly completes the removal to pollutent in sewage by the synergy between this three.But existing artificial swamp is after long-play, organic loading is too high, and the pollutent produced in system accumulates etc. and all can cause and obstruction bring series of problems.
Mainly there is following problem in existing artificial swamp:
Cleaning water is low: the required hydraulic detention time of most artificial swamps is longer, approximately needs 48 hours, and actual water outlet only reaches " urban wastewater treatment firm pollutant emission standard " secondary B standard in (GB18918-2002);
Purifying water effect is unstable: affected by the variation of water Pollutant levels and climatic factor, the artificial swamp purifying water effect is unstable;
Work-ing life is shorter: the problems such as general artificial swamp is used after a year and starts to occur the effluent quality fast-descending, and water outlet is not up to standard;
It is large that difficulty is changed in the maintenance of filler: the filler of general artificial swamp mixes stacking by layering, not easy cleaning, maintenance and replacing.
In addition, existing artificial swamp floor space is large: required effective construction area (square metre) be about 3~6 times of the pending water yield (ton).
Summary of the invention
The technical problem to be solved in the present invention is: in order to overcome the problems such as existing artificial swamp cleaning water is low, purifying water effect is unstable, work-ing life is short, be inconvenient to safeguard, provide a kind of multistage water purification undercurrent wetland processing system and sewage treatment process.
The technical solution adopted for the present invention to solve the technical problems is: a kind of multistage water purification undercurrent wetland processing system, comprise settling tank, clean water basin, water pump and at least one wetland unit, wetland unit comprises the hardware container of width opening, in the hardware container, have three holding tanks, in the first holding tank, be vertically installed with from top to bottom the II level anaerobism filtration module and the I level anaerobism filtration module that communicate, in the second holding tank, be vertically installed with from top to bottom the aerobic adsorption module of I level and the aerobic adsorption module of II level that communicate, aerobic adsorption module and anaerobism filtration module parallel alignment are also passed through pipeline communication, in the 3rd holding tank, be horizontally disposed with the microorganism module, the effective volume of anaerobism filtration module and aerobic adsorption module is all 1/2 of microorganism module effective volumes, aerobic adsorption module is by pipeline communication microorganism module, the holding tank arranged outside has a water level control flume, in the water level control flume, be provided with water purification charcoal core, water level is controlled on cell wall the water monitor of regulating aerobic adsorption module water level is installed, inlet channel is communicated with I level anaerobism filtration module, the corresponding water purification charcoal of outlet conduit one end core, the other end is communicated with water pump, water pump communicates with clean water basin.
Described I level anaerobism filtration module filler is the limestone of particle diameter 2~3cm, and the filler of II level anaerobism filtration module is the limestone of 1~2cm, porosity 35%-45%; The volcanics that the aerobic adsorption module filler of I level is particle diameter 3~5cm, the volcanics that the aerobic adsorption module filler of II level is particle diameter 2~3cm, porosity 40%-50%; The microorganism module adopts high poly-fiber 3 D elastic filler.
The height of the aerobic adsorption module of described I level and the aerobic adsorption module of II level is 1m, and the height of I level anaerobism filtration module and II level anaerobism filtration module is 1m, and the height of microorganism module is 0.5m, and the height of water level control flume is 1.5m.
In described water level control flume, be provided with two water purification charcoal cores.
Described water monitor is two induction drain type water monitors.
Described hardware container is brick structure or skeleton construction.
A kind of sewage treatment process has following steps: sewage in settling tank by natural sedimentation, block and remove floating solids and partial suspended particle; Enter wetland unit, first process I level anaerobism filtration module successively and II level anaerobism filtration module are effectively removed ammonia, nitrogen, phosphorus and the partial organic substances of sewage; Pass through successively the more aerobic adsorption module of I level and the aerobic adsorption module of II level, carry out aerobic nitrification reaction and aerobic anti-nitration reaction, negatively charged ion in adsorbed water body, carry out periodic adjustment and control the dissolved oxygen environment increased in sewage the change of level of aerobic adsorption module by the water monitor in the water level groove simultaneously; Enter the microorganism module, carry out the microorganism colonization reaction, further remove total phosphorus, total nitrogen and organism in water body; Enter the attached filtration of water purification charcoal wicking, further remove the amounts of residual contamination do in water body; The clear water of extracting out after filtering finally by water pump enters clean water basin.
The hydraulic detention time of described aerobic adsorption module 6 hours, water level be take and completed a fluctuation as the cycle in 12 hours around here, rises in namely 6 hours, and 6 hours are overboard.
The hydraulic detention time of described anaerobism filtration module is 6 hours, and the hydraulic detention time of microorganism module is 12 hours, and the water flow process of whole wetland unit is 24 hours.
The invention has the beneficial effects as follows: floor space is little: the construction area (square metre) only be 1.1~1.3 times of the pending water yield (ton), be the 1/5-1/3 that general artificial swamp is built area;
Cleaning water is high: required hydraulic detention time requires not coexist between 3~24 hours according to water outlet, effluent quality can reach " urban wastewater treatment firm pollutant emission standard " (GB18918-2002) one-level A standard~" urban sewage reutilization city miscellaneous water water quality standard " (GB T18920-2002), nitrogen removal rate reaches more than 80%, and total tp removal rate reaches more than 90%;
Purifying water effect is stable: by the dissolved oxygen environment in the change of level regulation system, thereby improve diversity and the stability of water purification microbial function group; It is little that buried undercurrent type design and bottom microbial reaction modular design allow the invention affected by seasonal factor, further improves stability;
Work-ing life is longer: the different microorganisms functional groups that multistage module series design and unique current are designed in Water treatment builds special obligate reaction environment, make increase the work-ing life of each modular environment, the whole service life estimation can reach 6~10 years at least;
Updating maintenance is easy to operate: difference in functionality filler piecemeal is stacked in modular design, and the maintenance in process easy to use and replacing, by regular maintenance management, can extend to the work-ing life of multistage compound water purification current wetland more than 50 years.
The accompanying drawing explanation
Fig. 1 is the longitudinal sectional view of wetland unit of the present invention
Fig. 2 is the spliced schematic diagram of a plurality of wetland units of the present invention
Fig. 3 is that the whole wet land system using planar of the present invention is arranged schematic diagram
Fig. 4 is the vertical view of Fig. 3
Fig. 5 is that the current of wetland unit of the present invention move towards schematic diagram
Fig. 6 is the curvilinear motion figure of removal efficiency of nitrogen and phosphorus of the present invention
Embodiment
Now by reference to the accompanying drawings and specific embodiment, the present invention is further detailed explanation.These accompanying drawings are the schematic diagram of simplification, basic structure of the present invention only is described in a schematic way, so it only show the formation relevant with the present invention.These embodiment are interpreted as only be used to the present invention is described, need not limiting the scope of the invention.
As shown in Figure 1, it is the longitudinal sectional view of wetland unit of the present invention, this wetland unit wetland unit comprises the hardware container 1 of width opening, in hardware container 1, have three holding tanks, in the first holding tank, be vertically installed with from top to bottom the II level anaerobism filtration module 21 and the I level anaerobism filtration module 22 that communicate, in the second holding tank, be vertically installed with from top to bottom the aerobic adsorption module 31 of the I level communicated and the aerobic adsorption module 32 of II level, aerobic adsorption module and anaerobism filtration module parallel alignment are also passed through pipeline communication, in the 3rd holding tank, be horizontally disposed with microorganism module 4, the effective volume of anaerobism filtration module 2 and aerobic adsorption module 3 is all 1/2 of microorganism module effective volumes, aerobic adsorption module 3 is by pipeline communication microorganism module 4, the holding tank arranged outside has a water level control flume 5, in water level control flume 5, be provided with water purification charcoal core 6, the water monitor 7 of regulating aerobic adsorption module water level is installed on water level control flume 5 walls, inlet channel 8 is communicated with I level anaerobism filtration module 21, the corresponding water purification charcoal of outlet conduit 9 one ends core 6, the other end is communicated with water pump 10, water pump 10 communicates with clean water basin 13.
Described I level anaerobism filtration module 21 fillers are the limestone of particle diameter 2~3cm, and the filler of II level anaerobism filtration module 22 is the limestone of 1~2cm, 35%-45%; Aerobic adsorption module 31 fillers of I level are volcanics of particle diameter 3~5cm, and aerobic adsorption module 32 fillers of II level are volcanics of particle diameter 2~3cm, porosity 40%-50%; Microorganism module 4 adopts high poly-fiber 3 D elastic filler, and water purification charcoal core is the charcoal of making through special high-temperature calcination treatment process.
As shown in Figure 2, be the spliced structural representation of a plurality of wetland units (being that length lengthens), the whole system modular design, be convenient to installation and maintenance.
As Fig. 3, shown in 4, practical application of the present invention in the embodiment of a villa in Jiangxi (take day output 150t/d as standard design), this multistage water purification undercurrent wetland processing system comprises grating tank 11, settling tank 12, clean water basin 13, water pump 10, equipment room 14, electrical control system and at least one wetland unit, wherein lateral dimension (long and wide) can be according to concrete application specific design, longitudinal size (height) is fixed measure, the aerobic adsorption module in upper strata, the virtual height of anaerobism filtration module is 1m(and does not comprise body of wall), the microorganism module virtual height of lower floor is that 0.5m(does not comprise body of wall), water level control flume virtual height is that 1.5m(does not comprise body of wall).Sewage enters anaerobism filtration module 2 after grating tank and settling tank pre-treatment, enter aerobic adsorption module 3 by up stream, then enters microorganism module 4 through downstream, and last parallel-flow enters water level control flume 5(through water purification charcoal core and sees Fig. 5).
It is by U-shaped pipe principle that water level of the present invention is controlled, thereby control the elevation of water surface in aerobic adsorption module by the elevation of water surface of controlling in the water level control flume, scope is to its bottom (the microorganism module that does not comprise lower floor), in 1 meter scope from the top of aerobic adsorption module.
As shown in Figure 1, in the hardware container, also be provided with blow-off pipe 15 and backwash tube 16, blow-off pipe 15 is connected with the power system of equipment room 14, for timing, the pollutent of anaerobism filtration module, aerobic adsorption module and microorganism module is extracted out; Backwash tube 16 is for rinsing holding tank.
The wetland unit modular unit, wetland unit consists of anaerobism filtration module, aerobic adsorption module, microorganism module, water purification charcoal core and water level control flume.
The anaerobism filtration module:
Series connection tagmeme: 1
Water (flow) direction: up stream
Reaction process: carry out anaerobic lactic acid fermentation, the reaction of anaerobism polyP bacteria, anaerobic nitrification bacterial reaction, weakly alkaline anaerobism filter packing carries out pH regulator to sewage simultaneously;
Aerobic adsorption module:
Series connection tagmeme: 2
Water (flow) direction: downstream
Reaction process: the aerobic nitrification bacterial reaction, the aerobic denitrifying bacteria reaction, the cation-adsorption filler adsorbs negatively charged ion in water body, increases dissolution of contaminated water oxygen by change of level;
The microorganism module:
Series connection position order: 3
Water (flow) direction: horizontal flow
Reaction process: microorganism colonization reactive center, the multiple-microorganism reaction process under the aerobic-oxygen environment of holding concurrently: nitrification, denitrification, poly-phosphorus effect etc.;
Water purification charcoal core: water outlet, through " water purification charcoal core " adsorption filtration of special high-temperature calcination art breading, is further removed pollutent in water body;
Water level control flume: according to " U " shape pipe principle, carry out periodic adjustment and control by the change of level of the aerobic adsorption module of water monitor in the water level grain.
Microflora:
Indigenous microorganisms+a kind of aerobic denitrifying bacteria that advanced to separate cultivation.
The dimension scale of each module:
Actual water body volume (effective volume) ratio after filler is filled out and put is:
Anaerobism filtration module: aerobic adsorption module: microorganism module=1:1:2
Each module hydraulic detention time is respectively: 6 hours, and 6 hours, 12 hours.
The hardware structure:
The hardware structure of container of wetland unit can be used brick structure and skeleton construction by the size difference, and scantlings of the structure can be according to the real needs specific design.
Sewage treatment process of the present invention has following steps: sewage in settling tank by natural sedimentation, block and remove floating solids and partial suspended particle; Enter wetland unit, first process I level anaerobism filtration module successively and II level anaerobism filtration module are effectively removed ammonia, nitrogen, phosphorus and the partial organic substances of sewage; Pass through successively the more aerobic adsorption module of I level and the aerobic adsorption module of II level, carry out aerobic nitrification reaction and aerobic anti-nitration reaction, negatively charged ion in adsorbed water body, carry out periodic adjustment and control the dissolved oxygen environment increased in sewage the change of level of aerobic adsorption module by the water monitor in the water level groove simultaneously; Enter the microorganism module, carry out the microorganism colonization reaction, further remove total phosphorus, total nitrogen and organism in water body; Enter the attached filtration of water purification charcoal wicking, further remove the amounts of residual contamination do in water body; The clear water of extracting out after filtering finally by water pump enters clean water basin.
Hydraulic detention time (HRT) refers to the treatment time of sewage in system, is to set according to the degradation rate of microbe the approximately 24 hours proliferating cycle of polyP bacteria and nitrifier.Passed through simultaneously concrete METHOD FOR CONTINUOUS DETERMINATION of testing (continuous 48 hours, measured once in every 6 hours), determine that finally native system optimal water power standing time (ratio of clearance and time is the highest) is 24 hours, with 1 speed (day output/24 hour) ton/hour water inlet continuously, the water outlet of 2 times of water intake velocity intermittent types, by the water monitor in the water level control flume, control aerobic adsorption module water inlet 6 hours, the emptying 6 hours of cutting off the water, cutting off the water 6 hours of anaerobism filtration module, the cutting off the water 12 hours of microorganism module.
The present invention realizes intrasystem oxygenation process by following two aspects
A, control and make aerobic module realize water logging in 6 hours by water level, the cycle alternate cycles of emptying in 6 hours, when water level is descending by draught head from extraneous air amount, and allow oxygen that arranged enough gas-liquid swap times in system
The volcanics that B, aerobic adsorption module are used concrete dynamic modulus, multiple sections, good rigidly, as filler, can wrap up air by water flow cutting on the one hand, can increase on the one hand the contact area of oxygen and water, reaches oxygenation effect preferably
Poly-phosphorus reaction of the present invention, nitration reaction and anti-nitration reaction are mainly by controlling dissolved oxygen environment (anaerobism, aerobic) thereby induce corresponding polyP bacteria (anaerobism), nitrifier (aerobic), denitrifying bacteria (aerobic or double oxygen) propagation.
By the different properties of filler, assist simultaneously the propagation of corresponding microorganism: the limestone main component in the anaerobism filtration module is calcium carbonate, and the phosphorus in energy active adsorption sewage, make phosphorus in the filling surface enrichment; The pH of while limestone energy adjustment of acidity sewage, thus make the anaerobism filtration module be conducive to the growth and reproduction of polyP bacteria.Volcanics in aerobic adsorption module has a large amount of holes and specific surface area, for adhering to propagation of aerobic nitrifier, denitrifying bacteria provides ecotopia.The microorganism module provides stable microorganism living environment (temperature, current, melt the conditions such as oxygen basicly stable), use simultaneously the poly-fiber 3 D elastic filler of the high and not susceptible to plugging height of specific surface area as main medium, for microorganism colonization provides ideal conditions.
The present invention improves diversity and the stability of microbial function group by following three aspects: effect;
A, oxygenation act as microbial growth necessary oxygen environment are provided;
B, the dry dry wet wet hydrology is changed to microorganism that more various living environment is provided, thereby improves the diversity of microflora;
The weak microorganism (intermediate disturbance) of part active (vitality) can be periodically eliminated in alternately changing of C, water level, thereby for the stronger microorganism of other vigor, vacate existence and the necessary environmental capacity of propagation, improved on the whole the stability (stoping the population caused because of excessive multiplication to degenerate) of microbial function group.
The experimental data explanation:
Experiment arranges: multistage compound water purification current wetland experimental system 3 covers (3 Duplicate Samples) after stable (approximately 1 month), and volume is 30L, i.e. treatment capacity 30L/d, hydraulic detention time 24h, change of level cycle 6h, wherein:
A sampling spot: anaerobism filtration module
B sampling spot: aerobic adsorption module
C sampling spot: microorganism module
Test data: total nitrogen TN, total phosphorus TP
Testing tool: Hash QC8500 flow injection (FIA) analyser
Experimental period: system is carried out to water inlet continuously in 48 hours, got sample one time in every 6 hours, repeat 2 water inlets, amount to 96 hours.
Experimental result: see the following form
Nitrogen removal rate
Total tp removal rate
Analyze: as can be known by upper table and Fig. 6, multistage compound water purification current wetland reaches more than 80% for the clearance of TN, and wherein aerobic adsorption module is higher to the clearance contribution degree of TN, illustrates that nitrification and denitrification effect herein is more remarkable;
The clearance of TP reaches more than 90%, and the removal whole process of TP is linear and rises, and wherein the anaerobism filtration module is more stable for the removal of TP, and the clearance fluctuation of aerobic adsorption module is larger.
Inlet and outlet water TN, TP concentration mean value
Principal character of the present invention and inventive point have only been described in above demonstration.Those skilled in the art should understand, and the present invention is not restricted to the described embodiments.Under the prerequisite that does not break away from point of the present invention and protection domain, the present invention also has various variations, and these changes and improvements all will fall in the scope of protection of present invention.The scope of protection of present invention is limited by appending claims and equivalent thereof.

Claims (9)

1. multistage water purification undercurrent wetland processing system, comprise settling tank, clean water basin, water pump and at least one wetland unit, it is characterized in that: wetland unit comprises the hardware container of width opening, in the hardware container, have three holding tanks, in the first holding tank, be vertically installed with from top to bottom the II level anaerobism filtration module and the I level anaerobism filtration module that communicate, in the second holding tank, be vertically installed with from top to bottom the aerobic adsorption module of I level and the aerobic adsorption module of II level that communicate, aerobic adsorption module and anaerobism filtration module parallel alignment are also passed through pipeline communication, in the 3rd holding tank, be horizontally disposed with the microorganism module, the effective volume of anaerobism filtration module and aerobic adsorption module is all 1/2 of microorganism module effective volumes, aerobic adsorption module is by pipeline communication microorganism module, the holding tank arranged outside has a water level control flume, in the water level control flume, be provided with water purification charcoal core, water level is controlled on cell wall the water monitor of regulating aerobic adsorption module water level is installed, inlet channel is communicated with I level anaerobism filtration module, the corresponding water purification charcoal of outlet conduit one end core, the other end is communicated with water pump, water pump communicates with clean water basin.
2. multistage water purification undercurrent wetland processing system according to claim 1, it is characterized in that: described I level anaerobism filtration module filler is the limestone of particle diameter 2~3cm, and the filler of II level anaerobism filtration module is the limestone of 1~2cm; The volcanics that the aerobic adsorption module filler of I level is particle diameter 3~5cm, the volcanics that the aerobic adsorption module filler of II level is particle diameter 2~3cm; The microorganism module adopts high poly-fiber 3 D elastic filler.
3. multistage water purification undercurrent wetland processing system according to claim 2, it is characterized in that: the height of the aerobic adsorption module of described I level and the aerobic adsorption module of II level is 1m, the height of I level anaerobism filtration module and II level anaerobism filtration module is 1m, the height of microorganism module is 0.5m, and the height of water level control flume is 1.5m.
4. multistage water purification undercurrent wetland processing system according to claim 3, is characterized in that: in described water level control flume, be provided with two water purification charcoal cores.
5. multistage water purification undercurrent wetland processing system according to claim 1 is characterized in that: described water monitor is two induction drain type water monitors.
6. multistage water purification undercurrent wetland processing system according to claim 1, it is characterized in that: described hardware container is brick structure or skeleton construction.
7. according to the described sewage treatment process of claim 1 or 4, it is characterized in that having following steps: sewage in settling tank by natural sedimentation, block and remove floating solids and partial suspended particle; Enter wetland unit, first process I level anaerobism filtration module successively and II level anaerobism filtration module are effectively removed ammonia, nitrogen, phosphorus and the partial organic substances of sewage; Pass through successively the more aerobic adsorption module of I level and the aerobic adsorption module of II level, carry out aerobic nitrification reaction and aerobic anti-nitration reaction, negatively charged ion in adsorbed water body, carry out periodic adjustment and control the dissolved oxygen environment increased in sewage the change of level of aerobic adsorption module by the water monitor in the water level groove simultaneously; Enter the microorganism module, carry out the microorganism colonization reaction, further remove total phosphorus, total nitrogen and organism in water body; Enter the attached filtration of water purification charcoal wicking, further remove the amounts of residual contamination do in water body; The clear water of extracting out after filtering finally by water pump enters clean water basin.
8. sewage treatment process according to claim 7 is characterized in that: the hydraulic detention time of described aerobic adsorption module 6 hours, and water level be take and completed a fluctuation as the cycle in 12 hours around here, rises in namely 6 hours, and 6 hours are overboard.
9. sewage treatment process according to claim 8, it is characterized in that: the hydraulic detention time of described anaerobism filtration module is 6 hours, and the hydraulic detention time of microorganism module is 12 hours, and the water flow process of whole wetland unit is 24 hours.
CN2013100957723A 2013-03-22 2013-03-22 Multi-stage water purification subsurface flow wetland treatment system and sewage treatment process Pending CN103408183A (en)

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Application Number Priority Date Filing Date Title
CN2013100957723A CN103408183A (en) 2013-03-22 2013-03-22 Multi-stage water purification subsurface flow wetland treatment system and sewage treatment process

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005074407A (en) * 2003-09-04 2005-03-24 Okumura Corp Water cleaning facility
CN101407360A (en) * 2008-08-23 2009-04-15 浙江海洋学院 Method for processing waste water of circulating marine culture by using artificial wet land
CN102336500A (en) * 2011-07-28 2012-02-01 农业部规划设计研究院 Rural domestic sewage treatment system suitable for northern part of China and technology thereof

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005074407A (en) * 2003-09-04 2005-03-24 Okumura Corp Water cleaning facility
CN101407360A (en) * 2008-08-23 2009-04-15 浙江海洋学院 Method for processing waste water of circulating marine culture by using artificial wet land
CN102336500A (en) * 2011-07-28 2012-02-01 农业部规划设计研究院 Rural domestic sewage treatment system suitable for northern part of China and technology thereof

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