CN1199880C - Composite stuffing for sewage treating biofilm process - Google Patents
Composite stuffing for sewage treating biofilm process Download PDFInfo
- Publication number
- CN1199880C CN1199880C CNB03140183XA CN03140183A CN1199880C CN 1199880 C CN1199880 C CN 1199880C CN B03140183X A CNB03140183X A CN B03140183XA CN 03140183 A CN03140183 A CN 03140183A CN 1199880 C CN1199880 C CN 1199880C
- Authority
- CN
- China
- Prior art keywords
- sewage
- base material
- compounded mix
- flyash
- surface area
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000010865 sewage Substances 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims description 14
- 239000002131 composite material Substances 0.000 title abstract 5
- 239000000203 mixture Substances 0.000 claims abstract description 38
- 239000000463 material Substances 0.000 claims abstract description 27
- 239000000945 filler Substances 0.000 claims abstract description 26
- 239000010881 fly ash Substances 0.000 claims abstract description 13
- 239000010455 vermiculite Substances 0.000 claims abstract description 13
- 229910052902 vermiculite Inorganic materials 0.000 claims abstract description 13
- 235000019354 vermiculite Nutrition 0.000 claims abstract description 13
- 239000004113 Sepiolite Substances 0.000 claims abstract description 12
- 239000004568 cement Substances 0.000 claims abstract description 12
- 235000019355 sepiolite Nutrition 0.000 claims abstract description 12
- 229910052624 sepiolite Inorganic materials 0.000 claims abstract description 12
- 229910021536 Zeolite Inorganic materials 0.000 claims abstract description 11
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000010457 zeolite Substances 0.000 claims abstract description 11
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 9
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910052921 ammonium sulfate Inorganic materials 0.000 claims abstract description 7
- 235000011130 ammonium sulphate Nutrition 0.000 claims abstract description 7
- 239000011148 porous material Substances 0.000 claims abstract description 7
- 229910001385 heavy metal Inorganic materials 0.000 claims description 7
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 6
- 239000011707 mineral Substances 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 6
- 239000007921 spray Substances 0.000 claims description 6
- 239000000758 substrate Substances 0.000 claims description 3
- 238000007254 oxidation reaction Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 6
- 239000012528 membrane Substances 0.000 abstract description 4
- 239000010842 industrial wastewater Substances 0.000 abstract description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract 4
- 239000008187 granular material Substances 0.000 abstract 4
- 230000002349 favourable effect Effects 0.000 abstract 1
- 239000002585 base Substances 0.000 description 12
- 238000004519 manufacturing process Methods 0.000 description 8
- 239000000126 substance Substances 0.000 description 8
- 239000004793 Polystyrene Substances 0.000 description 5
- 229920002223 polystyrene Polymers 0.000 description 5
- 239000007787 solid Substances 0.000 description 5
- 239000000796 flavoring agent Substances 0.000 description 4
- 235000019634 flavors Nutrition 0.000 description 4
- 229910004298 SiO 2 Inorganic materials 0.000 description 2
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 2
- 239000004927 clay Substances 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 238000009736 wetting Methods 0.000 description 2
- VZSRBBMJRBPUNF-UHFFFAOYSA-N 2-(2,3-dihydro-1H-inden-2-ylamino)-N-[3-oxo-3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propyl]pyrimidine-5-carboxamide Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)C(=O)NCCC(N1CC2=C(CC1)NN=N2)=O VZSRBBMJRBPUNF-UHFFFAOYSA-N 0.000 description 1
- YLZOPXRUQYQQID-UHFFFAOYSA-N 3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)-1-[4-[2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidin-5-yl]piperazin-1-yl]propan-1-one Chemical compound N1N=NC=2CN(CCC=21)CCC(=O)N1CCN(CC1)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F YLZOPXRUQYQQID-UHFFFAOYSA-N 0.000 description 1
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- MKYBYDHXWVHEJW-UHFFFAOYSA-N N-[1-oxo-1-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propan-2-yl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(C(C)NC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 MKYBYDHXWVHEJW-UHFFFAOYSA-N 0.000 description 1
- NIPNSKYNPDTRPC-UHFFFAOYSA-N N-[2-oxo-2-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)ethyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(CNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 NIPNSKYNPDTRPC-UHFFFAOYSA-N 0.000 description 1
- AFCARXCZXQIEQB-UHFFFAOYSA-N N-[3-oxo-3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(CCNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 AFCARXCZXQIEQB-UHFFFAOYSA-N 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 1
- 229920002978 Vinylon Polymers 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000000703 anti-shock Effects 0.000 description 1
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000005469 granulation Methods 0.000 description 1
- 230000003179 granulation Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229910052745 lead Inorganic materials 0.000 description 1
- 239000010451 perlite Substances 0.000 description 1
- 235000019362 perlite Nutrition 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Classifications
-
- 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
Landscapes
- Biological Treatment Of Waste Water (AREA)
Abstract
The present invention discloses a composite filler used for a sewage treatment biological membrane technology, which comprises the following components, in weight percentages, 48% to 68% of base material, 3% to 7% of ammonium sulfate as a pore forming agent and 35% to 45% of cement cementing agent, wherein the base material is one of activated carbon, expanded vermiculite, sepiolite, zeolite, flyash or analogues, or the mixture of some of the activated carbon, expanded vermiculite, sepiolite, zeolite, flyash or analogues, which are mixed in any proportion. The components are pulverized into granules with the granularity of 100 to 200 meshes in a fixed quantity mode, the granules are mixed, hot water at the temperature of 55 DEG C to 65 DEG C is sprayed to the granules for making balls, the balls are coagulated at the temperature of 40 DEG C to 70 DEG C, and the balls are cured at normal temperature, so that a composite filler with the granule diameter of 3mm to 20mm, the micropore diameter of 20 mum to 200 mum, and the specific surface area of 50 m<2>/g to 200 m<2>/g is obtained. The composite filler solves the problems of poor hydrophilicity, poor biological membrane attaching effect, small specific surface area, etc., which exist in existing fillers, and has the advantages of good hydrophilicity, favorable biological membrane attaching effect, large specific surface area, etc. Treated sewerage water quality can reach the national first grade discharge standard, and the composite filler is widely suitable for treating domestic sewage, lake and river sewage and industrial wastewater.
Description
Technical field the present invention relates to a kind of compounded mix that is used for the sewage disposal biomembrane process, more particularly, relate to a kind of compounded mix that is suitable for handling the applying biological membrane process of city domestic sewage, lake and river micro-polluted water and various industrial wastewater treatment systems.
Background technology in the prior art, biomembrane process is a Technology commonly used in the sewage disposal, this technology is to have stable, anti-shock loading, processing efficiency advantages of higher, filler is as the core of biomembrane process, directly have influence on the technique effect of biomembrane process, filler as microbe carrier must possess low density, bigger serface, open grain, high-hydrophilic, enough wear resistancies, enough physical and chemical performances such as chemical stability, and raw material sources are extensive, low production cost.Be applied to the coordination that the filler of biomembrane process such as haydite, polystyrene spherolite, combined stuffing, elastic solid filler etc. are difficult to reach performance and cost at present.Haydite has bigger specific surface area and porosity, has bio-film colonization performance preferably, but since this filler adopt stand clay and make ball after high-temperature roasting form, its yield rate is low, production cost is higher; The polystyrene spherolite is that raw material carries out chemical granulation with vinylbenzene, and its production cost is more lower slightly than haydite, but its wetting ability is poor, the bio-film colonization degradation; Combined stuffing and elastic solid filler respectively with fine and closely woven pencil vinylon silk or plastics silk as carrier, its unit volume filler production cost is lower, but its wetting ability, biofilm effect, specific surface area and unit specific surface area production cost are all not as haydite, and the application of above filler is restricted.
Summary of the invention the object of the present invention is to provide a kind of than lower production cost, low density, bigger serface, open grain, strongly hydrophilic, is particularly suitable for the compounded mix that the sewage disposal biomembrane process is used.
In order to achieve the above object, the invention provides following technical scheme: develop a kind of compounded mix, contain mineral substrate, the composition of filler and weight percentage are: base material 50%～68%, pore-forming material 3%～6%, cement bond agent 29%～45%, described base material is a gac, expanded vermiculite, sepiolite, zeolite, the mixture of one or more arbitrary proportions of flyash, described pore-forming material is an ammonium sulfate, it is 100～200 orders that described each component quantifying is crushed to granularity, mix, spray 55～65 ℃ of hot water and make ball, 40～70 ℃ condense, ambient cure, get particle diameter 3～20mm, micro-pore diameter 20～200 μ m micropores, specific surface area 50～200m
2The compounded mix of/g.In addition, the apparent density 1.0～1.5g/cm of compounded mix of the present invention
3, porosity 35～55%, specific surface area 50～200m
2/ g, broken wear rate＜2%, sour molten rate＜2%, the molten rate of alkali＜1%.Described mineral substrate comprises such as wilkinite, limonite, vermiculite, diatomite, perlite, sepiolite, clay, slag, flyash, vitriol industry soaks natural and artificial mineral's powder and analogues thereof such as slag, and this class filler main chemical is SiO
2, Al
2O
3, CaO, MgO, K
2O, Fe
2O
3Deng not containing harmful heavy metal and other objectionable impurities, the porosity height is the ideal compounded mix.In making ball, can use light-weight filler to make ball, core is a porous organic or inorganic material, in order to reduce the density of filler, the granularity of core is about 1/3 of a filler granularity.
The present invention's technical scheme preferably is: each composition and weight percentage in the base material of compounded mix are: gac 11%～23%, expanded vermiculite 7%～12%, sepiolite 16%～27%, zeolite 8%～14%, flyash 33%～50%.In described base material, comprise pore-forming material and cement bond agent, material chemical ingredients and content in the compounded mix are: SiO
231%-33%, Al
2O
313%-14%, CaO 33%-36%, MgO 2%-3%, K
2O1%-2%, NO
20.1%-0.3%, Fe
2O
34%-6%, Pb, Zn, Cu are a small amount of.Under this kind situation, the biofilm efficient of filler, physical and chemical performance is good, the nitrated performance of ammonia nitrogen is excellent and cost is low, this kind filler can be according to look, flavor character and the heavy metal ion content of sewage simultaneously, suitably adjust the mineral prescription, to reach except that look, to remove to distinguish the flavor of, reduce the technological effect of heavy metal content.
The application of compounded mix of the present invention: be used for biological film sewage treatment process, sewage is carried out bio-oxidation, decolouring, taste removal and reduces the heavy metal content of sewage.Compounded mix of the present invention is applied to biomembrane process, can guarantee water outlet COD
Cr≤ 40mg/L, BOD
5≤ 10mg/L, SS≤10mg/L, NH
3-N≤10mg/L, the sewage after the processing reach national sewage discharge primary standard.
Compared with prior art, the present invention has following tangible advantage: described compounded mix and haydite, the polystyrene spherolite, elastic solid filler and other compounded mix are compared, its production cost is 50% of a haydite, 60% of polystyrene spherolite, 70% of combined stuffing, 80% of elastic solid filler, filler biofilm efficient is 110% of haydite, 150% of polystyrene spherolite, 180% of combined stuffing, 200% of elastic solid filler, its physical and chemical performance is better than haydite, and the nitrated performance of ammonia nitrogen obviously is better than haydite, and this kind filler can be according to the look of sewage simultaneously, flavor character and heavy metal ion content, suitably adjust the mineral prescription, to reach except that look, remove flavor, reduce the technological effect of heavy metal content.Compounded mix of the present invention is applied to biomembrane process, can guarantee water outlet COD
Cr≤ 40mg/L, BOD
5≤ 10mg/L, SS≤10mg/L, NH
3-N≤10mg/L reaches national sewage discharge primary standard.
By specific embodiment the present invention is carried out more detailed description below the embodiment:
The manufacturing of embodiment 1 compounded mix
Example 1-1
Get base material gac 10Kg, expanded vermiculite 6Kg, flyash 32Kg adds up to 48Kg, it is that 100 orders, mixing, 65 ℃ of hot water of spray make that ball, 65 ℃ condense, ambient cure that ammonium sulfate 5Kg, cement 43Kg, each component quantifying are crushed to granularity, get particle diameter 10mm, micro-pore diameter 80 μ m micropores, specific surface area 100m
2The compounded mix of/g.Wherein contain base material 50%, pore-forming material 5.2%, cement bond agent 44.8%.
Example 1-2
Get base material expanded vermiculite 7Kg, sepiolite 25Kg, zeolite 13Kg, flyash 20Kg adds up to 65Kg, ammonium sulfate 5Kg, it is that 150 orders, mixing, 55 ℃ of hot water of spray make that ball, 40 ℃ condense, ambient cure that cement 40Kg, each component quantifying are crushed to granularity, particle diameter 8mm, micro-pore diameter 180 μ m micropores, specific surface area 100m
2The compounded mix of/g.Wherein contain base material 59%, pore-forming material 4.55%, cement bond agent 36.36%.
Example 1-3
Get gac 7Kg, expanded vermiculite 5Kg, sepiolite 14Kg, zeolite 6Kg, flyash 31Kg, add up to 63Kg, ammonium sulfate 5Kg, cement 40Kg, it is that 200 orders, mixing, 60 ℃ of hot water of spray make that ball, 55 ℃ condense, ambient cure that each component quantifying is crushed to granularity, get particle diameter 3mm, micro-pore diameter 30 μ m micropores, specific surface area 180m
2The compounded mix of/g.Wherein contain base material 58.33%, pore-forming material 4.63%, cement bond agent 37.03%.The content of a composition in the base material: gac 11%, expanded vermiculite 7.93%, sepiolite 22.22%, zeolite 9.52%, flyash 49.2%.
Example 1-4
Get gac 13Kg, expanded vermiculite 8Kg, sepiolite 17Kg, zeolite 8Kg, flyash 24Kg, add up to 70Kg, ammonium sulfate 3Kg, cement 30Kg, it is that 200 orders, mixing, 60 ℃ of hot water of spray make that ball, 55 ℃ condense, ambient cure that each component quantifying is crushed to granularity, get particle diameter 3mm, micro-pore diameter 30 μ m micropores, specific surface area 180m
2The compounded mix of/g.Wherein contain base material 67.96%, pore-forming material 2.91%, cement bond agent 29.13%.The content of a composition in the base material: gac 18.57%, expanded vermiculite 11.43%, sepiolite 24.29%, zeolite 11.43%, flyash 34.29%.
Embodiment 2 utilizes the sewage disposal of compounded mix for microbe carrier
Example 2-1 handles city domestic sewage
With the compounded mix of embodiment 1-2, sewage quality is before handling: COD
Cr280mg/L, BOD
5125mg/L, SS 184mg/L, NH
3-N 9mg/L handles back COD
Cr28mg/L, BOD
58mg/L, SS 7mg/L, NH
3-N 5mg/L.
Example 2-2 handles lake sewage
With the compounded mix of embodiment 1-3, sewage quality is before handling: COD
Cr48mg/L, BOD
525mg/L, SS 28mg/L, NH
3-N 7mg/L handles back COD
Cr10mg/L, BOD
52mg/L, SS 1mg/L, NH
3-N 1mg/L.
Example 2-3 handles the chemical plant industrial sewage
With the compounded mix of embodiment 1-4, sewage quality is before handling: COD
Cr572mg/L, BOD
530mg/L, SS 97mg/L, NH
3-N 37mg/L handles back COD
Cr85mg/L, BOD
526mg/L, SS 8mg/L, NH
3-N 9mg/L.
Claims (3)
1, a kind of compounded mix contains mineral substrate, it is characterized in that: the composition of filler and weight percentage are:
Base material 50%～68%
Pore-forming material 3%～6%
Cement bond agent 29%～45%
Described base material is the mixture of one or more arbitrary proportions of gac, expanded vermiculite, sepiolite, zeolite, flyash, described pore-forming material is an ammonium sulfate, it is that 100～200 orders, mixing, 55～65 ℃ of hot water of spray make that ball, 40～70 ℃ condense, ambient cure that described each component quantifying is crushed to granularity, get particle diameter 3～20mm, micro-pore diameter 20～200 μ m micropores, specific surface area 50～200m
2The compounded mix of/g.
2, compounded mix according to claim 1 is characterized in that: each composition and weight percentage in the base material are:
Gac 11%～23%
Expanded vermiculite 7%～12%
Sepiolite 16%～27%
Zeolite 8%～14%
Flyash 33%～50%.
3, compounded mix according to claim 1, it is characterized in that: it is applied to biological film sewage treatment process, and sewage is carried out bio-oxidation, decolouring, taste removal and reduces the heavy metal content of sewage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB03140183XA CN1199880C (en) | 2003-08-13 | 2003-08-13 | Composite stuffing for sewage treating biofilm process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB03140183XA CN1199880C (en) | 2003-08-13 | 2003-08-13 | Composite stuffing for sewage treating biofilm process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1486940A CN1486940A (en) | 2004-04-07 |
| CN1199880C true CN1199880C (en) | 2005-05-04 |
Family
ID=34155245
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB03140183XA Expired - Lifetime CN1199880C (en) | 2003-08-13 | 2003-08-13 | Composite stuffing for sewage treating biofilm process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1199880C (en) |
Cited By (1)
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| CN101723507B (en) * | 2009-12-11 | 2011-05-18 | 华南理工大学 | Three-dimensional concrete filling material for water treatment and preparation method thereof |
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| CN101234290B (en) * | 2007-11-21 | 2010-06-16 | 清华大学 | A kind of biofiltration combined filler for controlling organic and malodorous gases |
| WO2010139816A1 (en) * | 2009-06-05 | 2010-12-09 | Desarrollos Tecnicos Mc, S.L. | Composition and use of an adsorbent material for filtering toxic components during the process of incineration and/or distillation of glycerine generated from the production of biodiesel |
| CN101607810B (en) * | 2009-06-29 | 2012-05-09 | 东北电力大学 | Wastewater treatment composite filler containing zeolite and pulverized fuel ash and preparation method thereof |
| CN102380356B (en) * | 2010-11-23 | 2013-09-25 | 南通清波环保科技有限公司 | Adsorbent and preparation method thereof |
| CN102070243B (en) * | 2010-11-29 | 2012-03-28 | 郑州大学 | A kind of preparation method of silicate composite filler |
| CN102259974B (en) * | 2011-05-24 | 2013-07-31 | 合肥工业大学 | Magnetite-zeolite magnetic biological carrier material, as well as preparation method and application method thereof |
| CN102824894B (en) * | 2011-06-14 | 2014-08-27 | 辽宁科技大学 | Preparation method of granular fly ash used as water purifying agent |
| CN102765804B (en) * | 2012-07-05 | 2014-04-16 | 华南师范大学 | Constructed wetland sewage treatment method based on modularized built-in gap filler |
| CN103706265B (en) * | 2012-09-28 | 2018-01-19 | 通用电气公司 | Membrane structure suitable for gas separation and associated method |
| CN103951044B (en) * | 2014-05-23 | 2016-01-06 | 哈尔滨理工大学 | A kind of non-sintered rapid biofilm biologic packing material and preparation method thereof |
| CN105833716B (en) * | 2016-06-03 | 2017-11-10 | 湖南恒凯环保科技投资有限公司 | A kind of biological deodorization composition for being used to remove foul smell and its conduct filler are prepared and applied |
| CN109607778A (en) * | 2019-01-31 | 2019-04-12 | 北京潮白环保科技股份有限公司 | The processing method of the carrier of nitrate in a kind of removal water body |
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-
2003
- 2003-08-13 CN CNB03140183XA patent/CN1199880C/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101723507B (en) * | 2009-12-11 | 2011-05-18 | 华南理工大学 | Three-dimensional concrete filling material for water treatment and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1486940A (en) | 2004-04-07 |
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