CN102603069B - Artificial wetland suitable for low C/N sewage treatment - Google Patents
Artificial wetland suitable for low C/N sewage treatment Download PDFInfo
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- CN102603069B CN102603069B CN2012100874302A CN201210087430A CN102603069B CN 102603069 B CN102603069 B CN 102603069B CN 2012100874302 A CN2012100874302 A CN 2012100874302A CN 201210087430 A CN201210087430 A CN 201210087430A CN 102603069 B CN102603069 B CN 102603069B
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- 239000010865 sewage Substances 0.000 title claims abstract description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 48
- 239000002245 particle Substances 0.000 claims abstract description 11
- 238000012856 packing Methods 0.000 claims description 54
- 230000000630 rising effect Effects 0.000 claims description 11
- 235000013311 vegetables Nutrition 0.000 claims description 5
- 229910021536 Zeolite Inorganic materials 0.000 claims description 3
- 239000003610 charcoal Substances 0.000 claims description 3
- 239000003245 coal Substances 0.000 claims description 3
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims description 3
- 239000010457 zeolite Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 11
- 239000000945 filler Substances 0.000 abstract description 10
- 230000001105 regulatory effect Effects 0.000 abstract description 3
- 230000001502 supplementing effect Effects 0.000 abstract 4
- 238000007599 discharging Methods 0.000 abstract 3
- 230000001706 oxygenating effect Effects 0.000 abstract 1
- 238000003911 water pollution Methods 0.000 abstract 1
- 241000196324 Embryophyta Species 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 7
- 244000005700 microbiome Species 0.000 description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 239000011449 brick Substances 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 238000000746 purification Methods 0.000 description 4
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 3
- 230000001174 ascending effect Effects 0.000 description 3
- 238000001556 precipitation Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000005202 decontamination Methods 0.000 description 2
- 230000003588 decontaminative effect Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000006396 nitration reaction Methods 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 238000006213 oxygenation reaction Methods 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 239000011574 phosphorus Substances 0.000 description 2
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical group OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 1
- 235000014676 Phragmites communis Nutrition 0.000 description 1
- 240000001398 Typha domingensis Species 0.000 description 1
- 241000700605 Viruses Species 0.000 description 1
- 241000746966 Zizania Species 0.000 description 1
- 235000002636 Zizania aquatica Nutrition 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- -1 aluminum ion Chemical class 0.000 description 1
- 244000052616 bacterial pathogen Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000031018 biological processes and functions Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 229940088623 biologically active substance Drugs 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000005755 formation reaction Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000011440 grout Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000002503 metabolic effect Effects 0.000 description 1
- 239000002207 metabolite Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 230000003020 moisturizing effect Effects 0.000 description 1
- 230000003204 osmotic effect Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 230000028327 secretion Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 230000003245 working effect Effects 0.000 description 1
Images
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Abstract
The invention relates to the technical field of the water pollution treatment, in particular to an artificial wetland suitable for low C/N sewage treatment. The artificial wetland suitable for low C/N sewage treatment comprises a bed layer structure, an air duct, a water supplementing system and a water discharging system, wherein the bed layer structure comprises at least three filler layers successively arranged from top to bottom; the particle diameters of the filler layers are successively set from small to big; the air duct is penetrated through the filler layers; the water supplementing system is communicated with the filler layers; the water discharging system is communicated with the filler layer; according to more than three filler layers, the depth and the sectional area of the bed layer structure are enlarged, and the sewage processing capability is improved; the water supplementing system is used for regulating the bed layer of the water discharging system to lower the water lever even drain to form a vacuum bed layer so as to suck air; the bed layer oxygen-requiring requirement is satisfied, and the denitrification effect is greatly improved; the received bed layer air resistance is eliminated when the water supplementing system feeds water after the emptying operation is implemented; and the air duct can be used as an air inlet oxygenating channel when the bed layer is emptied.
Description
Technical field
The present invention relates to water and pollute processing technology field, particularly relate to a kind of artificial swamp that is applicable to low C/N sewage disposal.
Background technology
Artificial swamp is a kind of novel sewage disposal technology that grows up on sewage disposal technology bases such as soil processing, stabilization pond, biological filters from the seventies in 20th century, it mainly is to utilize the comprehensive action of wetland plant, microorganism and soil (or filler) to remove pollutants in sewage, have simple structure, processing costs is low and has advantages such as landscape effect, through the development of decades, this technology has obtained using widely gradually at aspects such as handling sanitary sewage, surface water, pollution of area source.
Artificial swamp can be considered by hand-stuff bed base (rubble) and bed table plantation plant two portions in the macro manifestations structure to be formed.The countless bed base of hole can provide different microenvironments with countless root systems, is suitable for various (supporting, detest foster, facultative well) microbial growth and Metabolic activity.Microorganism is the main body of artificial swamp ground soil-removing action.
Ammonia nitrogen is most of in the bed base in the sewage is removed by nitrated-denitrification biological process, and part ammonia nitrogen and nitre nitrogen are removed by plant absorbing.Organonitrogen mainly is suspension, is filtered by bed base and holds back, and be ammonia nitrogen, nitre nitrogen by the biochemical action mineralising, and then remove by plant absorbing and nitrated-denitrification process.Phosphorus great majority in the sewage exist with the orthophosphoric acid salt form, and mainly pass through the fixing precipitation of calcium, iron, aluminum ion in the constructed wetland bed base, and the absorption process of plant removal, and the phosphorus that precipitation anchors in the base finally can shift out by the replacing of bed base-material.Some micro-metals are absorbed, adsorb and remove by wetland plant by absorption or the precipitating action of constructed wetland bed base in the sewage.Most of pathogenic bacteria and virus are decomposed by the basic aerobic type biological uptake of the bed of artificial swamp in the sewage, and part is killed by secretions from plant roots.
As seen the constructed wetland bed base has huge surface-area, specific chemical constitution, countless root system and meta-bolites (oxygen, biologically active substance) thereof are for the filtration of pollutent is held back, physics and chemisorption, decomposition and precipitation, biological uptake and oxygenolysis, mineralising etc. provide good condition.The bed base of artificial swamp is more big more good to sewage treatment effect, deepens the wetland bed wetland bed interior surface-area that helps to strengthen, for microorganism provides bigger living space.
But reasons such as, plant transmission oxygen unreasonable owing to moisturizing inequality, filler grating is limited cause that artificial swamp stops up, the oxygen supply deficiency has formed serious reducing environment, have limited the nitrification of microorganism, exist the low problem of nitric efficiency always.So how to solve strengthening under the dark condition of bed, the oxygen level that increases the bed base becomes key.
Therefore, at the deficiencies in the prior art part, it is very necessary to need the artificial swamp technology that is applicable to low C/N sewage disposal that a kind of good purification is provided badly.
Summary of the invention
The objective of the invention is to avoid weak point of the prior art and the artificial swamp of the low C/N sewage disposal of being applicable to of a kind of good purification is provided.
Purpose of the present invention realizes by following technical measures:
A kind of artificial swamp that is applicable to low C/N sewage disposal is provided, comprise bed structure, it is characterized in that: also comprise airway, water charging system and outlet system, described bed structure comprises at least 3 packing layers that set gradually from top to bottom, the particle diameter of a plurality of described packing layers from top to bottom is ascending to set gradually, described airway is arranged in a plurality of described packing layers, and described water charging system is communicated with described packing layer, and described outlet system is communicated with described packing layer.
Wherein, described packing layer be low calorific value coal spoil, Wingdale, zeolite, porous charcoal wherein one or more.
Wherein, the total thickness of a plurality of described packing layers is 1.5m.
Wherein, the thickness of a plurality of described packing layers is identical.
Wherein, also be provided with vegetable layer above the described packing layer.
Wherein, described bed structure is the bed structure of thickness 1.5m.
Wherein, described bed structure comprises 5 packing layers that set gradually from top to bottom, and the particle diameter of 5 described packing layers is respectively 5～10mm, 10～25mm, 25～50mm, 50～100mm, 100～150mm from top to bottom, and the thickness of each packing layer is 0.3m.
Wherein, the tube wall surface of described airway is provided with ventilating pit.
Wherein, described water charging system comprises distributing flue and the water inlet person in charge, and water inlet is responsible for an end and is communicated with distributing flue, and the other end is communicated with packing layer.
Wherein, described outlet system comprises rising pipe and go out water channel, and the feed-water end of described rising pipe is arranged in the described packing layer, the exit end of described rising pipe with go out water channel and be communicated with.
Beneficial effect of the present invention:
A kind of artificial swamp that is applicable to low C/N sewage disposal, comprise bed structure, airway, water charging system and outlet system, described bed structure comprises at least 3 packing layers that set gradually from top to bottom, the particle diameter of a plurality of described packing layers from top to bottom is ascending to set gradually, described airway is arranged in a plurality of described packing layers, described water charging system is communicated with described packing layer, and described outlet system is communicated with described packing layer.
Packing layer more than 3, strengthened the degree of depth of bed structure, the configuration of the filler of different-grain diameter, strengthened the sectional area that bed structure is disposed of sewage, for microorganism provides bigger living space, improve sewage treatment capacity, water charging system is used for to regulating and control bed decline water level even put dried by outlet system, form bed " vacuum ", thereby suction air, satisfy the aerobic requirement of bed, created nitrated, required aerobic of anti-nitration reaction, detest and support the envrionment conditions that alternately changes, improve denitrification effect greatly, the bed vapour lock that is subjected to when airway eliminate to be implemented water charging system water inlet after " emptying " operation, and the air inlet oxygenation passage when can be used as bed emptying uses.
Description of drawings
The invention will be further described to utilize accompanying drawing, but the embodiment in the accompanying drawing does not constitute any limitation of the invention.
Fig. 1 is a kind of structural representation that is applicable to the artificial swamp of low C/N sewage disposal of the present invention.
In Fig. 1, include:
1---water inlet is responsible for, and 2---vegetable layer, 3---airway, 4---abutment wall, 5---packing layer, 6---rising pipe.
Embodiment
Elaborate below in conjunction with the present invention of embodiment.
Embodiment 1
A kind of artificial swamp that is applicable to low C/N sewage disposal, as shown in Figure 1, comprise bed structure, airway 3, water charging system and outlet system, described bed structure comprises 3 packing layers 5 that set gradually from top to bottom, the particle diameter of 3 described packing layers 5 is ascending to set gradually, described airway 3 is arranged in 3 described packing layers 5, and described water charging system is communicated with described packing layer 5, and described outlet system is communicated with described packing layer 5.
3 packing layer 5, strengthened the degree of depth of bed structure, the configuration of the filler of different-grain diameter, strengthened the sectional area that bed structure is disposed of sewage, for microorganism provides bigger living space, improve sewage treatment capacity, water charging system is used for to regulating and control bed decline water level even put dried by outlet system, form bed " vacuum ", thereby suction air, satisfy the aerobic requirement of bed, created nitrated, required aerobic of anti-nitration reaction, detest and support the envrionment conditions that alternately changes, improve denitrification effect greatly, airway 3 is eliminated the bed vapour lock that is subjected to when implementing water charging system water inlet after " emptying " operations, and the air inlet oxygenation passage when can be used as bed emptying uses.
Further, the particle diameter of 3 described packing layers 5 is respectively 5～10mm, 25～50mm, 100～150mm from top to bottom.The packing layer 5 that adopts this kind particle diameter to arrange, particle diameter is even, good purification.
Further, packing layer 5 is low calorific value coal spoil layer and/or Wingdale layer, and described packing layer 5 can also be zeolite layer or porous charcoal layer.
Further, the total thickness of a plurality of described packing layers 5 is 1.5m, and total thickness is the bed structure of the 0.5m～0.8m of bed structure in compared to existing technology of 1.5m, has increased producing depth and surface-area greatly, has improved decontamination effect improving.
Further, packing layer 5 is the packing layer 5 of thickness 0.5m.
Further, the thickness of a plurality of packing layers 5 is identical.A plurality of packing layers 5 that thickness is identical can make the osmotic effect of whole water body good.
Further, the tube wall surface of described airway 3 is provided with ventilating pit, and ventilating pit has played the effect that exchanges gas, has strengthened the effect of airway 3 elimination vapour locks.
Further, the layout density of airway 3 is 25m
2One, the airway 3 that adopts this kind density to arrange, the air guide effect is best.
Further, packing layer 5 tops also are provided with vegetable layer 2.Vegetable layer 2 can effectively absorb the objectionable impurities in the water body.
Further, be provided with abutment wall 4 around the bed structure.It is loose that abutment wall 4 can effectively protect bed structure to be difficult for, and plays the effect of reinforcing, antiscour.
Further, described water charging system comprises distributing flue and the water inlet person in charge 1, and water inlet is responsible for 1 one ends and is communicated with distributing flue, and the other end is communicated with packing layer 5.Water inlet be responsible for 1 and distributing flue be arranged on the abutment wall 4, install and use facility, described outlet system comprises rising pipe 6 and goes out water channel, the feed-water end of described rising pipe 6 is arranged in the described packing layer 5, the exit end of described rising pipe 6 with go out water channel and be communicated with.
The water body in bed structure that water charging system and outlet system can be realized is changed, and has improved the purification efficiency of bed structure.And the water inlet person in charge 1 is arranged at packing layer 5 tops, rising pipe 6 is arranged at packing layer 5 belows, and current flow into bed structure from the top, and rising pipe 6 outflows from the below have realized automatic replacing water body, the work-ing life of having improved bed structure.
Embodiment 2
Embodiment 2 is with the difference of embodiment 1: bed structure comprises 5 packing layers 5 that set gradually from top to bottom, the particle diameter of 5 described packing layers 5 is respectively 5～10mm, 10～25mm, 25～50mm, 50～100mm, 100～150mm from top to bottom, and the thickness of each packing layer 5 is 0.3m.Adopt the bed structure of packing layer 5 formations of this kind mode particle diameter, decontamination effect improving is best, and economical and practical.
The dark 1.2m of distributing flue canal, brick mix structure always is about 1900m; Bed structure degree of depth 1.5m is divided into five layers, and every layer thickness is the different-grain diameter rubble of 0.3m; The airway 3 of vertical embedding DN32 in the bed structure, pipe range 1.7m, layout density 25m
2One; Bed structure is divided into seven centres and separates with partition wall, the high 1.8m of partition wall, and wide 0.24m always is about 1200m, constructs abutment wall 4 all around, and abutment wall 4 high 4～5m are cemented rock and brick mix structure, length overall 4100; It is main that vegetable layer 2 adopts reed, cattail, wild rice stem and wilson iris; Go out water channel and be of a size of 430m*3m*4m, brick stone+brick mixes, and adopts completely to grout and builds.
Following table is for adopting the test-results of present embodiment:
| Water quality | pH | COD cr | BOD 5 | NH 3-N | TN | TP | DO |
| Water inlet | 7.57 | 31.96 | 9.10 | 31.82 | 35.00 | 0.54 | 3.02 |
| Water outlet | 7.56 | 16.58 | 4.68 | 8.90 | 10.40 | 0.11 | 5.18 |
| Processing rate | --- | 48.11％ | 48.56％ | 72.03％ | 70.28％ | 80.52％ | --- |
Should be noted that at last; above embodiment is only in order to illustrate technical scheme of the present invention but not limiting the scope of the invention; although with reference to preferred embodiment the present invention has been done detailed description; those of ordinary skill in the art is to be understood that; can make amendment or be equal to replacement technical scheme of the present invention, and not break away from essence and the scope of technical solution of the present invention.
Claims (1)
1. an artificial swamp that is applicable to low C/N sewage disposal comprises bed structure, airway, water charging system and outlet system;
Described bed structure comprises 5 packing layers that set gradually from top to bottom, the particle diameter of 5 described packing layers is respectively 5～10mm, 10～25mm, 25～50mm, 50～100mm, 100～150mm from top to bottom, the thickness of each packing layer is 0.3m, the total thickness of 5 described packing layers is 1.5m, and described packing layer is wherein one or more of low calorific value coal spoil, Wingdale, zeolite, porous charcoal;
Described packing layer top also is provided with vegetable layer;
The tube wall surface of described airway is provided with ventilating pit, and airway is arranged in 5 described packing layers;
Described water charging system comprises distributing flue and the water inlet person in charge, and water inlet is responsible for an end and is communicated with distributing flue, and the other end is communicated with packing layer;
Described outlet system comprises rising pipe and go out water channel, and the feed-water end of described rising pipe is arranged in the described packing layer, the exit end of described rising pipe with go out water channel and be communicated with.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012100874302A CN102603069B (en) | 2012-03-28 | 2012-03-28 | Artificial wetland suitable for low C/N sewage treatment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012100874302A CN102603069B (en) | 2012-03-28 | 2012-03-28 | Artificial wetland suitable for low C/N sewage treatment |
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| CN102603069A CN102603069A (en) | 2012-07-25 |
| CN102603069B true CN102603069B (en) | 2013-09-04 |
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| CN103324851B (en) * | 2013-06-24 | 2015-12-02 | 云南省农业科学院农业环境资源研究所 | A kind of carbon element controls the method for nitrogen in farmland soil pollution of area source |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5951866A (en) * | 1996-07-31 | 1999-09-14 | Grove; John E. | Cold climate wetland waste water treatment system |
| CN101708897A (en) * | 2009-11-26 | 2010-05-19 | 同济大学 | Water treatment technology of inclined plane undercurrent artificial wetland |
| CN201737801U (en) * | 2009-12-29 | 2011-02-09 | 苏州德华生态环境科技有限公司 | Enhanced vertical flow filtering bed |
| CN102010066A (en) * | 2010-11-12 | 2011-04-13 | 张四海 | Method for purifying sewage in vertical-flow artificial wetland |
| CN102190376A (en) * | 2011-05-05 | 2011-09-21 | 西安理工大学 | Integrated flow constructed wetland treatment system |
| CN202558699U (en) * | 2012-03-28 | 2012-11-28 | 武汉中科水生环境工程有限公司 | Constructed wetland suitable for low carbon/nitrogen (C/N) sewage treatment |
-
2012
- 2012-03-28 CN CN2012100874302A patent/CN102603069B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5951866A (en) * | 1996-07-31 | 1999-09-14 | Grove; John E. | Cold climate wetland waste water treatment system |
| CN101708897A (en) * | 2009-11-26 | 2010-05-19 | 同济大学 | Water treatment technology of inclined plane undercurrent artificial wetland |
| CN201737801U (en) * | 2009-12-29 | 2011-02-09 | 苏州德华生态环境科技有限公司 | Enhanced vertical flow filtering bed |
| CN102010066A (en) * | 2010-11-12 | 2011-04-13 | 张四海 | Method for purifying sewage in vertical-flow artificial wetland |
| CN102190376A (en) * | 2011-05-05 | 2011-09-21 | 西安理工大学 | Integrated flow constructed wetland treatment system |
| CN202558699U (en) * | 2012-03-28 | 2012-11-28 | 武汉中科水生环境工程有限公司 | Constructed wetland suitable for low carbon/nitrogen (C/N) sewage treatment |
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Denomination of invention: Constructed wetland suitable for low C/N sewage treatment Effective date of registration: 20131129 Granted publication date: 20130904 Pledgee: Guanggu Branch of Wuhan Rural Commercial Bank Co.,Ltd. Pledgor: WUHAN ZHONGKE HYDROBIOLOGY ENVIRONMENT ENGINEERING Co.,Ltd. Registration number: 2013990000917 |
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Denomination of invention: An artificial wetland suitable for low c/n sewage treatment Effective date of registration: 20220524 Granted publication date: 20130904 Pledgee: Guanggu Branch of Wuhan Rural Commercial Bank Co.,Ltd. Pledgor: WUHAN ZHONGKE HYDRBIOLOGY ENVIRONMENT ENGINEERING CO.,LTD. Registration number: Y2022420000133 |
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