CN101774684A - Filter material for water treatment and preparation method and application thereof - Google Patents
Filter material for water treatment and preparation method and application thereof Download PDFInfo
- Publication number
- CN101774684A CN101774684A CN201010130887A CN201010130887A CN101774684A CN 101774684 A CN101774684 A CN 101774684A CN 201010130887 A CN201010130887 A CN 201010130887A CN 201010130887 A CN201010130887 A CN 201010130887A CN 101774684 A CN101774684 A CN 101774684A
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- China
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- parts
- filtrate
- filter material
- pore
- water treatment
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Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 40
- 239000000463 material Substances 0.000 title claims abstract description 27
- 238000002360 preparation method Methods 0.000 title claims abstract description 7
- 238000010438 heat treatment Methods 0.000 claims abstract description 17
- 239000010881 fly ash Substances 0.000 claims abstract description 16
- 239000011230 binding agent Substances 0.000 claims abstract description 10
- 239000002994 raw material Substances 0.000 claims abstract description 10
- 230000035939 shock Effects 0.000 claims abstract description 8
- 238000002156 mixing Methods 0.000 claims abstract description 6
- 239000000706 filtrate Substances 0.000 claims description 17
- 238000000034 method Methods 0.000 claims description 12
- 238000000465 moulding Methods 0.000 claims description 10
- 239000002245 particle Substances 0.000 claims description 10
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical group [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 7
- 238000005469 granulation Methods 0.000 claims description 5
- 230000003179 granulation Effects 0.000 claims description 5
- 235000019353 potassium silicate Nutrition 0.000 claims description 5
- 238000013467 fragmentation Methods 0.000 claims description 4
- 238000006062 fragmentation reaction Methods 0.000 claims description 4
- 238000010907 mechanical stirring Methods 0.000 claims description 4
- 238000003756 stirring Methods 0.000 abstract description 6
- 238000005245 sintering Methods 0.000 abstract description 4
- 238000005273 aeration Methods 0.000 abstract description 3
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 239000010451 perlite Substances 0.000 abstract description 3
- 235000019362 perlite Nutrition 0.000 abstract description 3
- 239000003795 chemical substances by application Substances 0.000 abstract 1
- 239000008188 pellet Substances 0.000 description 31
- 238000005516 engineering process Methods 0.000 description 6
- 239000008187 granular material Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 239000010865 sewage Substances 0.000 description 4
- 239000004115 Sodium Silicate Substances 0.000 description 3
- 239000007864 aqueous solution Substances 0.000 description 3
- 229910052911 sodium silicate Inorganic materials 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 241000863032 Trieres Species 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 230000008602 contraction Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 239000010842 industrial wastewater Substances 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 239000002957 persistent organic pollutant Substances 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 239000010802 sludge Substances 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- 238000004065 wastewater treatment Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 241000195493 Cryptophyta Species 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009395 breeding Methods 0.000 description 1
- 230000001488 breeding effect Effects 0.000 description 1
- 230000009172 bursting Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000009770 conventional sintering Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000008236 heating water Substances 0.000 description 1
- 229910017053 inorganic salt Inorganic materials 0.000 description 1
- 235000012204 lemonade/lime carbonate Nutrition 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 239000006259 organic additive Substances 0.000 description 1
- 239000010815 organic waste Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000004901 spalling Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000005303 weighing Methods 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
- Filtering Materials (AREA)
Abstract
The invention belongs to the field of environmental protection, and discloses a filter material for water treatment, and a preparation method and application thereof. The filter material mainly adopts the following raw materials in parts by weight: 60-80 parts of fly ash, 0-20 parts of expanded perlite, 5-15 parts of binder and 5-50 parts of pore-forming agent. The preparation method of the filter material comprises the steps of mixing and granulating raw materials, heating wet material balls at high temperature by shock heating to generate steam to enable the material balls to expand and form holes, forming, sintering and solidifying at high temperature, and mechanically stirring to increase holes on the surface. The filter material can be used for biological water treatment, in particular to be used as the filter material of an aeration biological filter.
Description
Technical field
The invention belongs to the environmental protection field, relate to a kind of filter material for water treatment, be mainly used in Industrial Wastewater Treatment and aspect, urban sewage purification, in the biomembrance process water treatment procedure, as the filtrate in the BAF.
Background technology
China's water is seriously polluted, and water quality degenerates, and the Sustainable development of directly influence economy and people's is healthy, and especially organic pollutant has quickened the growth and breeding of algae substances in the water body, and water body is worsened fast.Biological water technology is applicable to Industrial Wastewater Treatment and urban sewage purification, is particularly useful for handling organic waste water.It is the sewage treatment process that rises at the end of the eighties and the beginning of the nineties that BAF (BAF) is disposed of sewage, widely popular America and Europe and Japan.In recent years, China has also launched research to BAF technology.As biomembranous carrier, filtrate is the core integral part of BAF, influences the operation control and the treatment effect of this technology.Therefore, filtrate is significant for applying of biological aerated filter process.
Advantage such as ceramic grain filter has light weight porous, surface irregularity, specific surface area is big, bio-film colonization is easy, intensity is high, anti-flushing, filtering velocity height, loss of pressure head are little, do not stop up is with a wide range of applications.Ceramic grain filter receives more and more closer concern because of its cheap price and excellent performance, especially utilizes microorganism that the organic pollutant in the water is adsorbed in the BAF of handling with oxygenolysis and is bringing into play important effect.Flyash is industrial residue, if can mainly utilize flyash to produce biofilter material, both can environmental protection, and can economize on resources again.
Baking ceramsite must possess two primary conditions: high temperature can produce suitable viscosity and surface tension down, makes pellet softening; Chemical reaction takes place, and produces an amount of gas.Traditional sintering process is: under 1000-1200 ℃ high temperature, material is near molten state, and pellet is softening; Carbon dust or organic additive burning, high temperature such as inorganic salt such as lime carbonate decompose, and the gas of generation expands, and part is overflowed formation expansion porous pellet.Traditional technology temperature requirement height, heat-up time is long, consumes the more energy; Additive increases cost, and discharge the gas contamination atmosphere.Require the pellet drying before the high temperature sintering, discharge combination water and volatile component in 200-500 ℃ of scope, moisture is regarded " unfavorable composition ".During high temperature sintering, requirement guarantees that as far as possible pellet is softening and gets angry and carry out simultaneously, increased operation easier.
Summary of the invention
The purpose of this invention is to provide that a kind of cost is low, save energy, easily manufactured filter material for water treatment.
Another object of the present invention provides the preparation method of this filter material for water treatment.
A further object of the invention provides the purposes of this filter material for water treatment.
The objective of the invention is to realize by following technical proposal:
A kind of filter material for water treatment, this filtrate mainly adopts the raw material of following weight part:
Flyash 60-80 part, pearlstone 0-20 part, binding agent 5-15 part, 5～50 parts of pore-forming materials.
Described filtrate, wherein binding agent is a water glass, pore-forming material is a water.
The preparation method of described filtrate, this method may further comprise the steps:
(1) raw material mixing, granulation: get flyash 60-80 part by weight, pearlstone 0-20 part, binding agent 5-15 part, 5～50 parts of pore-forming materials mix binding agent earlier with an amount of pore-forming material, mix granulation with all the other compositions again;
(2) expansion molding: wet granular directly is put into shock heating expansion in the hot environment, and expansion temperature 300-900 ℃, time 2-10 minute;
(3) hot setting: the particle behind the expansion molding was through 900-1000 ℃ of roasting 2-10 minute;
(4) mechanical stirring: the particle behind the hot setting carries out mechanical stirring, makes the fragmentation of particle surface thin-walled small bubbles, increases perforate, promptly.
The application of described filtrate in biological water treatment is particularly as the application of filtrate in the BAF.
Below be the detailed description of technical solution of the present invention:
Flyash is industrial residue, utilization of waste material, and cost is low, increases its weight percentage in batching as far as possible.Under normal conditions, its fineness≤0.074mm.
Pearlstone, fineness scope 0.075～0.180mm, powder is thicker, mixes in the flyash, helps increasing the plasticity-(during granulation, pellet is soft, is easy to dilatational strain, prevents that again pellet is soft excessively, is difficult for spheroiding) of particle (also weighing ball).Pearlstone begins to expand about 900 ℃, can reduce the dense structure of pellet inside to a certain extent, reduce its density, and the intensity effect to material is little, and (shape substantially and constitutional features have been determined when the 400-700 ℃ of left and right sides, it can be to avoid the hole wall in the structure too fine and close that perlite after 900 ℃ expands, control perlitic content and fineness well, can not cause the pellet spalling; More than 900 ℃, pellet also can soften once more, can bear certain structure and change, and 900-1000 ℃ of roasting can allow hole wall fine and close more firm, may cause simultaneously the contraction of hole wall, be embedded in perlite on the hole wall structure that the contraction of offsetting hole wall brings that expands and shrink).
Water glass is made binding agent, can guarantee that pellet is easy to softening transform when heat build-up is expanded, and is difficult for bursting.
Flyash and pearlstone thorough mixing add the sodium silicate aqueous solution for preparing, and fully stir.Marumerizer directly tumbles warm pellet in the High Temperature Furnaces Heating Apparatus.Keep fire box temperature moderate, temperature Tai Gaotai is low all not too to be beneficial to the pellet expansion molding, and temperature is controlled at 300-900 ℃ generally speaking, preferably in 400-700 ℃ of scope.The pellet expansion molding time is shorter, and the pellet of expansion molding stopped 2-10 minute in stove, can finish the primary solidification of pellet.The wet feed ball has plasticity-and anti-capillary ability, under relatively lower temp, and the steam expansion pore-creating of shock heating generation, energy-saving and emission-reduction increase operability.Key of the present invention is embodied in the shock heating water vapor expansion pore-creating moulding process.
Pellet drops into the High Temperature Furnaces Heating Apparatus roasting, is advisable roasting time 2-10 minute for furnace temperature 900-1000 ℃.Too high maturing temperature and long roasting time can make pellet surface knot glaze.After the high-temperature roasting, naturally cooling.There is the thin-walled bubble on cooled pellet surface, puts into stirrer and mixes slightly, and the small bubbles on broken pellet surface increase surperficial perforate and roughness, increases specific surface area.
Beneficial effect of the present invention:
Filter material for water treatment provided by the invention is a main raw material with industrial residue flyash, is fired by special technology to form.The present invention adopts the wet feed ball to carry out the shock heating heating of high temperature, and the water in the pellet becomes water vapor rapidly, makes pellet expansion pore-creating, forms vesicular structure.The present invention carries out utilization of waste material to flyash, and adopts water vapor expansion pore-creating, does not need pellet is carried out dry in advance, need not to use additive, and overcome conventional sintering method temperature requirement height, heat-up time long, consume more shortcomings such as the energy.The particle performance testing index, and in the water treatment procedure, reducing COD and removing NH
3-N aspect has obtained very ideal effect, COD and NH
3The clearance of-N is all more than 90%.The raw materials cost that the present invention adopts is low, and the preparation method is simple, energy-conserving and environment-protective, and the water treatment effect is better, has good industrial applications prospect, is particularly suitable as filtrate in the BAF.
Embodiment
The invention will be further elaborated by the following examples.
Every weight part is 100g in following examples.
Embodiment 1
Raw material (by weight): 80 parts in flyash, 20 parts of pearlstones, 9 parts of water glass, 21 parts in water.
The prepare silicon acid sodium aqueous solution, concentration 30wt%.Flyash and pearlstone thorough mixing add sodium silicate solution, fully stir.Marumerizer, particle diameter 6～8mm, wet feed ball render in 500 ℃ of High Temperature Furnaces Heating Apparatuss, constant temperature 10 minutes, the shock heating heating of wet feed ball warp high temperature produces water vapor and makes pellet expansion pore-creating, moulding.Pellet is rendered in 950 ℃ the High Temperature Furnaces Heating Apparatus, roasting 5 minutes.Naturally cool to room temperature after coming out of the stove.Cooled pellet is put into agitator stir a moment, make the small bubbles fragmentation of pellet surface, form perforate.
Tap density, apparent density, wear rate and surface-area are measured according to the method that standard C J/T299-2008 provides.Granule strength is to be measured by ZQJ-II intelligence granule strength trier.
| Characteristic parameter | Test result | Index |
| Tap density | ??0.60g/cm 3 | |
| Apparent density | ??1.05g/cm 3 | |
| Wear rate | ??2.3％ | ??≤6％ |
| Surface-area | ??2.8×10 4cm 2/g | ??≥0.5×10 4cm 2/g |
| Granule strength | 142N/ |
Filtrate is deposited in the filled column, and packing layer highly is 1m approximately, and vexed exposing to the sun carried out bio-film colonization with active sludge, and about 3-7 of biofilm time days, biofilm efficient height.Former water COD=705.4mg/L, NH
3-N=35.8mg/L.26 ℃ of envrionment temperatures, the waste water filled column of flowing through from bottom to top, hydraulic detention time 1h, aeration, gas-water ratio=10: 1.Water outlet COD=21.6mg/L, NH
3-N=0.9mg/L, clearance are respectively 96.9.0% and 97.5%.
Embodiment 2
Raw material (by weight): 80 parts in flyash, 10 parts of pearlstones, 10 parts of water glass, 30 parts in water.
The prepare silicon acid sodium aqueous solution, concentration 25wt%.Flyash and pearlstone thorough mixing add sodium silicate solution, fully stir.Marumerizer, particle diameter 6～8mm, wet feed ball render in 550 ℃ of High Temperature Furnaces Heating Apparatuss, constant temperature 10 minutes, the shock heating heating of wet feed ball warp high temperature produces water vapor and makes pellet expansion pore-creating, moulding.The cooling of coming out of the stove, pellet are rendered in 975 ℃ the High Temperature Furnaces Heating Apparatus, roasting 3 minutes.Naturally cool to room temperature after coming out of the stove.With cooled pellet, put into agitator and stir a moment, make the small bubbles fragmentation of pellet surface, form perforate.
Tap density, apparent density, wear rate and surface-area are measured according to the method that standard C J/T299-2008 provides.Granule strength is to be measured by ZQJ-II intelligence granule strength trier.
| Characteristic parameter | Test result | Index |
| Tap density | ??0.57g/cm 3 | |
| Apparent density | ??1.06g/cm 3 | |
| Wear rate | ??2.0％ | ??≤6％ |
| Surface-area | ??2.4×10 4cm 2/g | ??≥0.5×10 4cm 2/g |
| Granule strength | 150N/ |
Filtrate is deposited in the filled column, and packing layer highly is 1m approximately, and vexed exposing to the sun carried out bio-film colonization with active sludge, and about 3-7 of biofilm time days, biofilm efficient height.Former water COD=605.3mg/L, NH
3-N=30.5mg/L.28 ℃ of envrionment temperatures, the waste water filled column of flowing through from bottom to top, hydraulic detention time 1h, aeration, gas-water ratio=10: 1.Water outlet COD=18.5mg/L, NH
3-N=0.8mg/L, clearance are respectively 97.0% and 97.4%.
Claims (5)
1. filter material for water treatment is characterized in that this filtrate mainly adopts the raw material of following weight part:
Flyash 60-80 part, pearlstone 0-20 part, binding agent 5-15 part, 5～50 parts of pore-forming materials.
2. filtrate according to claim 1 is characterized in that binding agent is a water glass, and pore-forming material is a water.
3. the preparation method of filtrate according to claim 1 is characterized in that this method may further comprise the steps:
(1) raw material mixing, granulation: get flyash 60-80 part by weight, pearlstone 0-20 part, binding agent 5-15 part, 5～50 parts of pore-forming materials mix binding agent earlier with an amount of pore-forming material, mix granulation with all the other compositions again;
(2) expansion molding: wet granular directly is put into shock heating expansion in the hot environment, and expansion temperature 300-900 ℃, time 2-10 minute;
(3) hot setting: the particle behind the expansion molding was through 900-1000 ℃ of roasting 2-10 minute;
(4) mechanical stirring: the particle behind the hot setting carries out mechanical stirring, makes the fragmentation of particle surface thin-walled small bubbles, increases perforate, promptly.
4. the application of the described filtrate of claim 1 in biological water treatment.
5. application according to claim 4 is characterized in that this application is as filtrate in the BAF with the described filtrate of claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101308878A CN101774684B (en) | 2010-03-23 | 2010-03-23 | Filter material for water treatment and preparation method and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101308878A CN101774684B (en) | 2010-03-23 | 2010-03-23 | Filter material for water treatment and preparation method and application thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101774684A true CN101774684A (en) | 2010-07-14 |
| CN101774684B CN101774684B (en) | 2012-07-04 |
Family
ID=42511309
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010101308878A Expired - Fee Related CN101774684B (en) | 2010-03-23 | 2010-03-23 | Filter material for water treatment and preparation method and application thereof |
Country Status (1)
| Country | Link |
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| CN (1) | CN101774684B (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102060457A (en) * | 2010-11-30 | 2011-05-18 | 哈尔滨工业大学 | Method for manufacturing filter material for biological aerated filter by utilizing waste fly ash and waste coal gangue |
| CN102258913A (en) * | 2011-06-10 | 2011-11-30 | 谭海燕 | Low-density ceramsite filter material for biological aerated filter, and preparation method thereof |
| CN102350135A (en) * | 2011-08-08 | 2012-02-15 | 杰成纯水设备科技(太仓)有限公司 | Production method of pearlite filter element |
| CN102786191A (en) * | 2012-07-13 | 2012-11-21 | 哈尔滨工业大学 | Method for preparing water treatment filter material by using waterworks sludge and sewage sludge |
| CN103482754A (en) * | 2013-08-29 | 2014-01-01 | 华侨大学 | Shell ceramsite biological carrier and preparation method thereof |
| CN106512551A (en) * | 2016-12-12 | 2017-03-22 | 浙江工业大学 | Amino-functionalized regenerated glass filter material for water treatment and preparation and application thereof |
| CN108558368A (en) * | 2018-06-13 | 2018-09-21 | 徐州世润德环保科技有限公司 | Multiporous biological filtrate and preparation method thereof |
| CN108863310A (en) * | 2018-06-15 | 2018-11-23 | 徐州世润德环保科技有限公司 | Fiber micropore biological filtrate and preparation method thereof |
| CN114751765A (en) * | 2022-03-24 | 2022-07-15 | 安徽能泰高科环保技术有限公司 | Porous biological filter material for biological aerated filter and preparation method thereof |
| CN115181716A (en) * | 2022-06-25 | 2022-10-14 | 广西七彩环境科技有限公司 | Method for culturing and propagating target microorganisms by using porous nonmetallic mineral material |
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| CN1369464A (en) * | 2001-02-15 | 2002-09-18 | 王泽生 | Powdered coal powder-pearlite haydite and its preparing process |
| CN1569683A (en) * | 2003-07-24 | 2005-01-26 | 中国地质科学院成都矿产综合利用研究所 | Novel filter material used in process of bio-aeration filter tank |
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| CN1285335A (en) * | 2000-09-29 | 2001-02-28 | 唐山陶瓷集团有限公司 | Process for preparation of foam ceramic spherulite |
| JP2002241183A (en) * | 2001-02-14 | 2002-08-28 | Kawashima:Kk | Porous ceramic particle and its production process |
| CN1369464A (en) * | 2001-02-15 | 2002-09-18 | 王泽生 | Powdered coal powder-pearlite haydite and its preparing process |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102060457A (en) * | 2010-11-30 | 2011-05-18 | 哈尔滨工业大学 | Method for manufacturing filter material for biological aerated filter by utilizing waste fly ash and waste coal gangue |
| CN102060457B (en) * | 2010-11-30 | 2012-09-05 | 哈尔滨工业大学 | Method for manufacturing filter material for biological aerated filter by utilizing waste fly ash and waste coal gangue |
| CN102258913B (en) * | 2011-06-10 | 2013-07-17 | 谭海燕 | Low-density ceramsite filter material for biological aerated filter, and preparation method thereof |
| CN102258913A (en) * | 2011-06-10 | 2011-11-30 | 谭海燕 | Low-density ceramsite filter material for biological aerated filter, and preparation method thereof |
| CN102350135B (en) * | 2011-08-08 | 2013-09-18 | 杰成纯水设备科技(太仓)有限公司 | Production method of pearlite filter element |
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| CN102786191A (en) * | 2012-07-13 | 2012-11-21 | 哈尔滨工业大学 | Method for preparing water treatment filter material by using waterworks sludge and sewage sludge |
| CN103482754A (en) * | 2013-08-29 | 2014-01-01 | 华侨大学 | Shell ceramsite biological carrier and preparation method thereof |
| CN106512551A (en) * | 2016-12-12 | 2017-03-22 | 浙江工业大学 | Amino-functionalized regenerated glass filter material for water treatment and preparation and application thereof |
| CN106512551B (en) * | 2016-12-12 | 2018-09-21 | 浙江工业大学 | For the amino functional repeat glass filtrate of water process and its preparation and application |
| CN108558368A (en) * | 2018-06-13 | 2018-09-21 | 徐州世润德环保科技有限公司 | Multiporous biological filtrate and preparation method thereof |
| CN108863310A (en) * | 2018-06-15 | 2018-11-23 | 徐州世润德环保科技有限公司 | Fiber micropore biological filtrate and preparation method thereof |
| CN114751765A (en) * | 2022-03-24 | 2022-07-15 | 安徽能泰高科环保技术有限公司 | Porous biological filter material for biological aerated filter and preparation method thereof |
| CN115181716A (en) * | 2022-06-25 | 2022-10-14 | 广西七彩环境科技有限公司 | Method for culturing and propagating target microorganisms by using porous nonmetallic mineral material |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101774684B (en) | 2012-07-04 |
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