CN105502390A - Method for preparing activated carbon from rice husks and sludge in sewage plant - Google Patents
Method for preparing activated carbon from rice husks and sludge in sewage plant Download PDFInfo
- Publication number
- CN105502390A CN105502390A CN201510987141.1A CN201510987141A CN105502390A CN 105502390 A CN105502390 A CN 105502390A CN 201510987141 A CN201510987141 A CN 201510987141A CN 105502390 A CN105502390 A CN 105502390A
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- China
- Prior art keywords
- rice husk
- sewage plant
- plant sludge
- drying treatment
- prepare
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- 235000007164 Oryza sativa Nutrition 0.000 title claims abstract description 48
- 235000009566 rice Nutrition 0.000 title claims abstract description 48
- 239000010903 husk Substances 0.000 title claims abstract description 47
- 238000000034 method Methods 0.000 title claims abstract description 44
- 239000010802 sludge Substances 0.000 title claims abstract description 34
- 239000010865 sewage Substances 0.000 title claims abstract description 30
- 241000196324 Embryophyta Species 0.000 title claims abstract description 27
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title abstract description 22
- 240000007594 Oryza sativa Species 0.000 title 1
- 241000209094 Oryza Species 0.000 claims abstract description 47
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 24
- 230000004913 activation Effects 0.000 claims abstract description 22
- 238000003763 carbonization Methods 0.000 claims abstract description 8
- 239000002154 agricultural waste Substances 0.000 claims abstract description 5
- 238000001035 drying Methods 0.000 claims description 24
- 238000004065 wastewater treatment Methods 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 238000000227 grinding Methods 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 238000002203 pretreatment Methods 0.000 claims description 3
- 239000002699 waste material Substances 0.000 abstract description 6
- 230000008569 process Effects 0.000 abstract description 3
- 238000007086 side reaction Methods 0.000 abstract description 3
- 230000007935 neutral effect Effects 0.000 abstract 1
- 239000000047 product Substances 0.000 description 15
- 229910052799 carbon Inorganic materials 0.000 description 8
- 238000010521 absorption reaction Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 238000004064 recycling Methods 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- 235000013162 Cocos nucifera Nutrition 0.000 description 3
- 244000060011 Cocos nucifera Species 0.000 description 3
- 239000002956 ash Substances 0.000 description 3
- 239000003610 charcoal Substances 0.000 description 3
- 239000003245 coal Substances 0.000 description 3
- 239000002131 composite material Substances 0.000 description 3
- 239000000975 dye Substances 0.000 description 3
- 238000001179 sorption measurement Methods 0.000 description 3
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 229910001385 heavy metal Inorganic materials 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 239000010902 straw Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- ZBMRKNMTMPPMMK-UHFFFAOYSA-N 2-amino-4-[hydroxy(methyl)phosphoryl]butanoic acid;azane Chemical compound [NH4+].CP(O)(=O)CCC(N)C([O-])=O ZBMRKNMTMPPMMK-UHFFFAOYSA-N 0.000 description 1
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 description 1
- XFXPMWWXUTWYJX-UHFFFAOYSA-N Cyanide Chemical compound N#[C-] XFXPMWWXUTWYJX-UHFFFAOYSA-N 0.000 description 1
- 235000014676 Phragmites communis Nutrition 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical class ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- 239000012190 activator Substances 0.000 description 1
- 239000013543 active substance Substances 0.000 description 1
- 230000000274 adsorptive effect Effects 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000004042 decolorization Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 231100001240 inorganic pollutant Toxicity 0.000 description 1
- 229910052740 iodine Inorganic materials 0.000 description 1
- 239000011630 iodine Substances 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000002957 persistent organic pollutant Substances 0.000 description 1
- 239000000575 pesticide Substances 0.000 description 1
- -1 pluck hydrochlorate Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/10—Treatment of sludge; Devices therefor by pyrolysis
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
Landscapes
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Carbon And Carbon Compounds (AREA)
Abstract
The invention discloses a method for preparing activated carbon from rice husks and sludge in a sewage plant. The method at least comprises steps as follows: Step 1, agricultural waste rice husks and sludge produced by a sewage treatment system are mixed and dried; Step 2, a dried product is subjected to high-temperature closed carbonization, and the carbonized product is ground; Step 3, the ground carbonized product and a NaOH solution are mixed and dried; Step 4, the dried product is pretreated and activated under the closed condition; Step 5, the activated product is washed to be neutral and dried, and the activated carbon is obtained. The secondary pollution problem caused by rice husk incineration and sludge is solved, waste treatment and resource utilization are realized, and the economic value is realized; due to adoption of dry method activation, the prepared activated carbon is good in performance; the technological process is friendly and free of side reactions.
Description
Technical field
The present invention relates to offal treatment and recycling field, particularly relate to a kind of method utilizing rice husk and sewage plant sludge to prepare gac.
Background technology
In numerous method of wastewater treatment, charcoal absorption be at present application the most simply, the most extensively, the most ripe a kind of technique means.Gac is also called porous charcoal (carbon), is the unbodied carbon materials of a kind of black, has flourishing pore texture, and specific surface area is large, can reach 500 ~ 2000m
2/ g, has very strong adsorptive power, to Adsorption effects that all tool is stronger such as the organic pollutant in waste water, inorganic pollutant and heavy metal ion.Utilize gac to carry out wastewater treatment, efficiency is high, floor space is little, facility investment is few, to the cruel class of the benzene dissolved in water, vinyl chloride class, prussiate, pluck hydrochlorate, dye pesticide, tensio-active agent, heavy metal ion etc. and have good Adsorption effect.In recent years, grow with each passing day for the demand of active carbon with high specific surface area product in market.
At present, the industrial coal that generally adopts is as the raw material producing gac.Although technology maturation, coal belongs to Nonrenewable resources, and the absorption property of active carbon from coal is general not high.Also the research utilizing waste to prepare gac has in succession been carried out both at home and abroad.Common waste comprises coconut husk, fruit stone, wood chip etc., is wherein most widely used with coconut husk.But coconut is skewness worldwide, mainly concentrate on tropical and subtropical region, therefore its raw material sources are limited, cost is relatively high.Rice husk is a kind of agricultural wastes.China is eating rice production state maximum in the world, and State Statistics Bureau authority issues paddy rice annual production in 2010 and reaches 1.958 hundred million tons, produces nearly 4,000 ten thousand tons of rice husk per year.But current most of rice husk is directly burnt or is abandoned on the spot, and contaminate environment wastes resource again.Occur in recent years adopting rice husk to be the research that gac prepared by raw material.Can block the pore structure of the gac of synthesis due to ash oontent high in rice husk, cause product specific surface area to diminish, the Properties of Activated Carbon adopting Physical to prepare is lower.D.Kalderis etc. are with ZnCl
2gac is prepared in activation, and material specific surface area only has 811m
2/ g.N.S.Awwad etc. pass through H
3pO
4gac is prepared in activation, product specific surface area also only 451.82m
2/ g.Basta etc. report KOH activation preparation rice straw gac, and due to the strong basicity of KOH, the ash content in sample greatly reduces, and gac specific surface area reaches 1917m
2/ g.Liou finds before high-temperature activation, and Bian NaOH solution dip treating rice husk, significantly can reduce ash content to 0.1%, and gac specific surface area is then 2434m
2/ g.Li Yue etc. adopt the method for phosphoric acid activation rice husk to prepare gac, and be 3 at activator and the ratio of charcoal, activation temperature is 400 DEG C, and when soak time is 2h, can prepare iodine sorption value is 809mg/g, and macropore is flourishing.Utilize rice husk to prepare high absorption property gac day by day to come into one's own.
In recent years, high added value recycling that gac realizes mud also draws attention day by day to utilize mud to prepare.According to mud carbonization mechanism, the common method of current municipal sludge preparing active carbon can be summarized as direct carborization, physical activation method, chemical activation method, fly ash method and microwave irradiation.But most of pure active sludge carbon micro content is few and specific surface area is little, limit its application.There is research to be presented in mud and add the absorption property that the high material of organic content can improve active sludge carbon.Fan Xiaodan etc. with the by product mud after disposing of sewage for starting material, active sludge carbon is prepared with physical activation method, result show gac when pH is 1 to the percent of decolourization of amino black dyestuff up to 99.70%, also 67.57% is reached to the clearance of COD, decolorizing effect and merchandise active carbon decolorizing effect close.The people such as Zhou Pin with sewage treatment plant residual mud and reed straw for raw material, the method of chemical activation and high temperature pyrolysis is adopted to prepare stalk sludge composite base gac, result shows that its absorption property of composite base gac that stalk adulterates significantly improves, and composite base gac has good absorption property to this dyestuff.
Summary of the invention
Object of the present invention: provide a kind of method utilizing rice husk and sewage plant sludge to prepare gac, is avoiding gac is prepared on the basis of polluting, and the better performances of gac.
To achieve these goals, technical scheme of the present invention is:
Utilize rice husk and sewage plant sludge to prepare a method for gac, the method at least comprises the steps:
Step 1: the mud that agricultural wastes rice husk and Waste Water Treatment produce is mixed, and carries out drying treatment.
Step 2: the product after drying treatment is carried out high-temperature closed carbonization, and carbonized product is ground.
Step 3: the carbonized product ground is mixed with NaOH solution, and carries out drying treatment.
Step 4: in confined conditions the product after drying treatment carried out pre-treatment and activate.
Step 5: the product water after activation is washed till center, and oven dry obtains gac.
Above-mentioned utilize rice husk and sewage plant sludge prepare the method for gac, and wherein, in described step 1, the blending ratio of described rice husk and described mud is 5%-30%.
Above-mentioned utilize rice husk and sewage plant sludge prepare the method for gac, and wherein, in described step 1, the temperature range of described drying treatment is 100 DEG C-150 DEG C, and the time of described drying treatment is 2 hours-3 hours.
Above-mentioned utilize rice husk and sewage plant sludge prepare the method for gac, and wherein, in described step 2, the temperature range of described high-temperature closed carbonization is 400 DEG C-550 DEG C.
Above-mentioned utilize rice husk and sewage plant sludge prepare the method for gac, and wherein, in described step 2, the carbonized product of described grinding is below 200 orders.
Above-mentioned utilize rice husk and sewage plant sludge prepare the method for gac, and wherein, in described step 3, the mass concentration of described NaOH solution is 20%-50%.
Above-mentioned utilize rice husk and sewage plant sludge prepare the method for gac, and wherein, in described step 3, the temperature range of described drying treatment is 100 DEG C-150 DEG C, and the time of described drying treatment is 2 hours-3 hours.
Above-mentioned utilize rice husk and sewage plant sludge prepare the method for gac, and wherein, in described step 4, described pretreated temperature range is 400 DEG C-550 DEG C, and the described pretreated time is 20 minutes-60 minutes.
Above-mentioned utilize rice husk and sewage plant sludge prepare the method for gac, and wherein, in described step 4, the temperature range of described activation is 700 DEG C-900 DEG C, and the time of described activation is 1 hour-2 hours.
Above-mentioned utilize rice husk and sewage plant sludge prepare the method for gac, and wherein, in described step 5, the temperature range of described oven dry is 100 DEG C-150 DEG C.
Present invention, avoiding the secondary pollution problem that rice husk burns and mud brings, both achieved treatment of wastes produced object, and achieved recycling again, and achieved economic worth; Owing to have employed dry activation, obtained Properties of Activated Carbon is good; Technological process is friendly, occurs without side reaction.
Accompanying drawing explanation
Fig. 1 is a kind of schema utilizing rice husk and sewage plant sludge to prepare the method for gac of the present invention.
Embodiment
Embodiments of the invention are further illustrated below in conjunction with accompanying drawing.
Refer to shown in accompanying drawing 1, a kind of method utilizing rice husk and sewage plant sludge to prepare gac, the method at least comprises the steps:
Step 1: the mud that agricultural wastes rice husk and Waste Water Treatment produce is mixed, and carries out drying treatment.
Step 2: the product after drying treatment is carried out high-temperature closed carbonization, and carbonized product is ground.
Step 3: the carbonized product ground is mixed with NaOH solution, and carries out drying treatment.
Step 4: in confined conditions the product after drying treatment carried out pre-treatment and activate.
Step 5: the product water after activation is washed till center, and oven dry obtains gac.
In described step 1, the blending ratio of described rice husk and described mud is 5%-30%.
In described step 1, the temperature range of described drying treatment is 100 DEG C-150 DEG C, and the time of described drying treatment is 2 hours-3 hours.
In described step 2, the temperature range of described high-temperature closed carbonization is 400 DEG C-550 DEG C.
In described step 2, the carbonized product of described grinding is below 200 orders.
In described step 3, the mass concentration of described NaOH solution is 20%-50%.
In described step 3, the temperature range of described drying treatment is 100 DEG C-150 DEG C, and the time of described drying treatment is 2 hours-3 hours.
In described step 4, described pretreated temperature range is 400 DEG C-550 DEG C, and the described pretreated time is 20 minutes-60 minutes.
In described step 4, the temperature range of described activation is 700 DEG C-900 DEG C, and the time of described activation is 1 hour-2 hours.
In described step 5, the temperature range of described oven dry is 100 DEG C-150 DEG C.
In sum, present invention, avoiding the secondary pollution problem that rice husk burns and mud brings, both achieved treatment of wastes produced object, and achieved recycling again, and achieved economic worth; Owing to have employed dry activation, obtained Properties of Activated Carbon is good; Technological process is friendly, occurs without side reaction.
The foregoing is only the preferred embodiments of the present invention; not thereby the scope of the claims of the present invention is limited; every equivalent structure transformation utilizing description of the present invention to do; or directly or indirectly use the technical field being attached to other related productss, be all in like manner included in scope of patent protection of the present invention.
Claims (10)
1. utilize rice husk and sewage plant sludge to prepare a method for gac, it is characterized in that: the method at least comprises the steps:
Step 1: the mud that agricultural wastes rice husk and Waste Water Treatment produce is mixed, and carries out drying treatment;
Step 2: the product after drying treatment is carried out high-temperature closed carbonization, and carbonized product is ground;
Step 3: the carbonized product ground is mixed with NaOH solution, and carries out drying treatment;
Step 4: in confined conditions the product after drying treatment carried out pre-treatment and activate;
Step 5: the product water after activation is washed till center, and oven dry obtains gac.
2. the method utilizing rice husk and sewage plant sludge to prepare gac according to claim 1, is characterized in that: in described step 1, and the blending ratio of described rice husk and described mud is 5%-30%.
3. the method utilizing rice husk and sewage plant sludge to prepare gac according to claim 1, is characterized in that: in described step 1, and the temperature range of described drying treatment is 100 DEG C-150 DEG C, and the time of described drying treatment is 2 hours-3 hours.
4. the method utilizing rice husk and sewage plant sludge to prepare gac according to claim 1, is characterized in that: in described step 2, and the temperature range of described high-temperature closed carbonization is 400 DEG C-550 DEG C.
5. the method utilizing rice husk and sewage plant sludge to prepare gac according to claim 1, is characterized in that: in described step 2, and the carbonized product of described grinding is below 200 orders.
6. the method utilizing rice husk and sewage plant sludge to prepare gac according to claim 1, is characterized in that: in described step 3, and the mass concentration of described NaOH solution is 20%-50%.
7. the method utilizing rice husk and sewage plant sludge to prepare gac according to claim 1, is characterized in that: in described step 3, and the temperature range of described drying treatment is 100 DEG C-150 DEG C, and the time of described drying treatment is 2 hours-3 hours.
8. the method utilizing rice husk and sewage plant sludge to prepare gac according to claim 1, is characterized in that: in described step 4, and described pretreated temperature range is 400 DEG C-550 DEG C, and the described pretreated time is 20 minutes-60 minutes.
9. the method utilizing rice husk and sewage plant sludge to prepare gac according to claim 1, is characterized in that: in described step 4, and the temperature range of described activation is 700 DEG C-900 DEG C, and the time of described activation is 1 hour-2 hours.
10. the method utilizing rice husk and sewage plant sludge to prepare gac according to claim 1, is characterized in that: in described step 5, and the temperature range of described oven dry is 100 DEG C-150 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510987141.1A CN105502390A (en) | 2015-12-27 | 2015-12-27 | Method for preparing activated carbon from rice husks and sludge in sewage plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510987141.1A CN105502390A (en) | 2015-12-27 | 2015-12-27 | Method for preparing activated carbon from rice husks and sludge in sewage plant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105502390A true CN105502390A (en) | 2016-04-20 |
Family
ID=55710777
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510987141.1A Pending CN105502390A (en) | 2015-12-27 | 2015-12-27 | Method for preparing activated carbon from rice husks and sludge in sewage plant |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106830602A (en) * | 2017-02-17 | 2017-06-13 | 西安航天源动力工程有限公司 | Sludge carbide furnace when a kind of temp-controlling and time-controlling sludge carbonization method and multi-segment type temperature control control |
| CN107285309A (en) * | 2017-06-27 | 2017-10-24 | 浙江大学 | A kind of oily sludge and the biomass combined method for preparing multistage mesoporous activated carbon |
| CN108033448A (en) * | 2018-01-31 | 2018-05-15 | 西南石油大学 | A kind of coconut husk-sludge composite activated carbon and its preparation method and application |
| CN108862277A (en) * | 2018-08-22 | 2018-11-23 | 武汉轻工大学 | Rice husk-sludge base composite activated carbon and preparation method thereof |
| CN110104644A (en) * | 2019-04-10 | 2019-08-09 | 浙江清风源环保科技有限公司 | A method of high absorption property active carbon, which is prepared, using black-koji mould bacterium mud activates |
| CN110302751A (en) * | 2019-05-21 | 2019-10-08 | 肇庆市珈旺环境技术研究院 | Composite biomass charcoal material and preparation method and application thereof |
| CN110917724A (en) * | 2019-12-13 | 2020-03-27 | 陕西速源节能科技有限公司 | Preparation method of filter material for sewage treatment |
-
2015
- 2015-12-27 CN CN201510987141.1A patent/CN105502390A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106830602A (en) * | 2017-02-17 | 2017-06-13 | 西安航天源动力工程有限公司 | Sludge carbide furnace when a kind of temp-controlling and time-controlling sludge carbonization method and multi-segment type temperature control control |
| CN106830602B (en) * | 2017-02-17 | 2023-11-21 | 西安航天源动力工程有限公司 | Temperature-control time-control sludge carbonization method and multistage temperature-control time-control sludge carbonization furnace |
| CN107285309A (en) * | 2017-06-27 | 2017-10-24 | 浙江大学 | A kind of oily sludge and the biomass combined method for preparing multistage mesoporous activated carbon |
| CN107285309B (en) * | 2017-06-27 | 2020-03-20 | 浙江大学 | Method for preparing hierarchical pore activated carbon by compounding oily sludge and biomass |
| CN108033448A (en) * | 2018-01-31 | 2018-05-15 | 西南石油大学 | A kind of coconut husk-sludge composite activated carbon and its preparation method and application |
| CN108862277A (en) * | 2018-08-22 | 2018-11-23 | 武汉轻工大学 | Rice husk-sludge base composite activated carbon and preparation method thereof |
| CN110104644A (en) * | 2019-04-10 | 2019-08-09 | 浙江清风源环保科技有限公司 | A method of high absorption property active carbon, which is prepared, using black-koji mould bacterium mud activates |
| CN110302751A (en) * | 2019-05-21 | 2019-10-08 | 肇庆市珈旺环境技术研究院 | Composite biomass charcoal material and preparation method and application thereof |
| CN110917724A (en) * | 2019-12-13 | 2020-03-27 | 陕西速源节能科技有限公司 | Preparation method of filter material for sewage treatment |
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Application publication date: 20160420 |
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