CN101306812A - Process for preparing active carbon by co-decomposition of city sludge and agricultural wastes - Google Patents
Process for preparing active carbon by co-decomposition of city sludge and agricultural wastes Download PDFInfo
- Publication number
- CN101306812A CN101306812A CNA2008101233836A CN200810123383A CN101306812A CN 101306812 A CN101306812 A CN 101306812A CN A2008101233836 A CNA2008101233836 A CN A2008101233836A CN 200810123383 A CN200810123383 A CN 200810123383A CN 101306812 A CN101306812 A CN 101306812A
- Authority
- CN
- China
- Prior art keywords
- municipal sludge
- agricultural wastes
- sludge
- active carbon
- solid product
- 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.)
- Granted
Links
- 239000010802 sludge Substances 0.000 title claims abstract description 51
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 35
- 239000002154 agricultural waste Substances 0.000 title claims abstract description 31
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 8
- 229910052799 carbon Inorganic materials 0.000 title claims description 11
- 238000000354 decomposition reaction Methods 0.000 title claims description 5
- 239000012265 solid product Substances 0.000 claims abstract description 24
- 239000000203 mixture Substances 0.000 claims abstract description 12
- 239000000047 product Substances 0.000 claims abstract description 11
- 229910002651 NO3 Inorganic materials 0.000 claims abstract description 8
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 claims abstract description 8
- 238000010438 heat treatment Methods 0.000 claims abstract description 6
- 238000005516 engineering process Methods 0.000 claims description 7
- 238000000034 method Methods 0.000 abstract description 13
- 238000000197 pyrolysis Methods 0.000 abstract description 10
- 238000010298 pulverizing process Methods 0.000 abstract description 8
- 238000001816 cooling Methods 0.000 abstract description 7
- 238000011282 treatment Methods 0.000 abstract description 7
- 230000007613 environmental effect Effects 0.000 abstract description 4
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 238000002955 isolation Methods 0.000 abstract 1
- 238000002156 mixing Methods 0.000 abstract 1
- 239000010865 sewage Substances 0.000 description 8
- 239000010902 straw Substances 0.000 description 8
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 description 6
- 230000008901 benefit Effects 0.000 description 6
- 239000011630 iodine Substances 0.000 description 6
- 229910052740 iodine Inorganic materials 0.000 description 6
- 238000012546 transfer Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 4
- 239000002699 waste material Substances 0.000 description 4
- 238000012545 processing Methods 0.000 description 3
- 239000002689 soil Substances 0.000 description 3
- 239000002023 wood Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003337 fertilizer Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000001717 pathogenic effect Effects 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 239000002912 waste gas Substances 0.000 description 2
- 102000002322 Egg Proteins Human genes 0.000 description 1
- 108010000912 Egg Proteins Proteins 0.000 description 1
- 241000628997 Flos Species 0.000 description 1
- 206010019233 Headaches Diseases 0.000 description 1
- 241001465754 Metazoa Species 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 241000209140 Triticum Species 0.000 description 1
- 235000021307 Triticum Nutrition 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000011284 combination treatment Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 150000002013 dioxins Chemical class 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000006353 environmental stress Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 238000007429 general method Methods 0.000 description 1
- 238000003306 harvesting Methods 0.000 description 1
- 231100001261 hazardous Toxicity 0.000 description 1
- 231100000869 headache Toxicity 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 239000010903 husk Substances 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000001473 noxious effect Effects 0.000 description 1
- 210000004681 ovum Anatomy 0.000 description 1
- 244000045947 parasite Species 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000009384 sea disposal Methods 0.000 description 1
- 239000011257 shell material Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002594 sorbent Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 238000007669 thermal treatment Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 231100000167 toxic agent Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 239000003440 toxic substance Substances 0.000 description 1
- 239000011573 trace mineral Substances 0.000 description 1
- 235000013619 trace mineral Nutrition 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Processing Of Solid Wastes (AREA)
Abstract
A process for preparing activated carbon by co-pyrolysis of municipal sludge and agricultural waste comprises the steps of mixing the agricultural waste and the municipal sludge in a certain proportion to obtain a mixture; heating the mixture at a certain temperature under the condition of air isolation, keeping the temperature for a period of time, collecting a solid product, and cooling; and pulverizing the solid product to obtain the activated carbon product. In order to obtain an activated carbon with higher absorptive capacity, a certain amount of nitrate can be added into the mixture. Because the agricultural waste can make up the low heat value shortcoming of the sludge, while the municipal sludge can solve the problems with the agricultural waste that the pyrolysis solid product is easy to flow away and difficult to store, the inventive process can not only solve the high energy consumption and high cost problems of the prior sludge incineration, pyrolysis and other heat treatment methods, but also can be used for environmental treatment to save energy and reduce emission.
Description
Technical field
The present invention relates to a kind of Preparation of Activated Carbon, especially for municipal sludge and agricultural wastes copyrolysis preparing active carbon.
Background technology
Municipal sludge is the sedimentable matter that produces in the municipal sewage treatment process.Establish to 661 in China in 2006 and to build together into 791 of sewage works in the city, city, about 1,730,000 tons of mud annual production (dry weight), and annual speed with about 10% is increasing.It is generally acknowledged that sludge quantity accounts for 0.5%~0.7% (volume) of sewage quantity usually, perhaps is about 1%~2% (quality) of sewage load.If the sewage disposal degree of depth strengthens, sludge quantity also can increase by 0.5~1 times sometimes.
Municipal sludge is municipal sewage plant's sludge discharged, also can be the organic mud that contains that discharges during industrial sewage is handled.Contain various trace elements and organic matters such as solid particulates such as silt particle, fiber, plant and animal residues, microorganism and agglomerative floss thereof and more nitrogen, phosphorus in the municipal sludge, also containing a large amount of pathogenic agent, parasite (ovum) and a certain amount of heavy metal and multiple toxic organics, is all difficult problems of ten minutes headache of present countries in the world.
Agricultural wastes are meant vegetalitas waste materials such as waste in depleted stalk in agricultural-food production, the course of processing, husk, shell, waste residue and the wood working process such as wood chip.Since the reform and opening-up, because farmers' income improves constantly, peasant's mode of life has the trend of urbanization.The agricultural crop straw that past uses as fuel wood in the rural area, present most of Rural areas is abandoned by the peasant, even is seen as burden.Therefore, every harvesting season is for following the line of least resistance, the peasant usually gets the agricultural crop straw on-site incineration over, has not only wasted resource, has also caused serious atmospheric pollution simultaneously, the usually normal operation of the vehicles around the influence, near the particularly safe landing of aircraft the influence.
Sludge treatment is disposed and to be mainly contained with the traditional way that utilizes that to abandon sea, landfill, burn and do fertilizer etc. several.Because it is big that mud is abandoned sea disposal environmental stress, is under an embargo in most of country.Actually, the disposal options that generally adopts at present is landfill and as fertilizer sources use on agricultural.The sanitary landfill of mud starts from the sixties in last century, up to the present, has developed into the Sludge Disposal Techniques of a comparative maturity, and its advantage is that investment is less, capacity big, instant effect.Yet also there are many problems in the municipal sludge sanitary landfill.The various hazardous and noxious substances that contain in the mud also will take a large amount of soils simultaneously through etch and the seepage meeting polluted underground water and the atmosphere of rainwater, and in addition, trucking costs is high at a distance also is an important factor of the sanitary landfill of restriction mud.Environmental pollution can not be finally avoided in the sanitary landfill of mud, and has just delayed generation time.More than all unfavorable factors limited the development of the sanitary landfill of mud, will can not become the developing direction of sludge ultimate disposal.
With regard to environmentAL safety, sludge incineration is best treatment process relatively.The burning of mud once had been subjected to people's welcome very much, needed to handle etc. again and had limited its use yet sludge incineration is big with one-time investment again, facility investment is high, running expense is high, can produce highly toxic substance such as Dioxins, burn ash.Because incinerator equipment complexity, construction and transport expense are used far above general method for sludge treatment, burning cost is 2~4 times of other technologies (ton dewatered sludge comprehensive treating process cost is about 700~1000 yuan), is difficult to economically support, and therefore can't be applied actually.With regard to present situation, recycling sludge is the megatrend of development.
Summary of the invention
The objective of the invention is to overcome the deficiency in the prior art, provide a kind of investment little, expense is low, municipal sludge of turning waste into wealth and agricultural wastes process for preparing active carbon by co-decomposition.
Municipal sludge of the present invention and agricultural wastes process for preparing active carbon by co-decomposition:
A. agricultural wastes and municipal sludge are mixed by a certain percentage;
B. with said mixture secluding air heating at a certain temperature, and constant temperature takes out solid product and cools off after for some time;
C. solid product is pulverized, promptly obtained activated carbon product.
Interpolation butt weight percent is 1%~10% nitrate in the mixture of described agricultural wastes and municipal sludge; It is 10%~70% that described agricultural wastes account for mixture butt weight percent; It is 30%~90% that described municipal sludge accounts for mixture butt weight percent; The temperature of described secluding air heating is 350~550 ℃; Described constant temperature for some time is 10~20min.
Beneficial effect: with municipal sludge and agricultural wastes copyrolysis, the difficulty and the problem that run into separately in the time of can solving the independent pyrolysis processing of these two kinds of materials of municipal sludge and farm crop agricultural wastes.Because the characteristics of agricultural wastes are organic content height, the calorific value height of pyrolysis product, but solid product density low, easily waft, be difficult to storing; And the moisture height of municipal sludge, calorific value are low, need extraneous supplementing energy during pyrolysis, cause high energy consumption, and solid product density is big, and viscosity is difficult to greatly carry simultaneously.These two kinds of materials by suitable mixed, then can be learnt from other's strong points to offset one's weaknesses, can make the solution of problem become easy.Particularly bring new chance and potentiality for the recycling treatment of mud and the application of product.Agricultural wastes can remedy the low defective of sludge calorific value, and mud can remedy the problem that agricultural wastes pyrolysis solid product easily wafts and is difficult to store and transport, and the pyrolysis solid product then how is used for environmental improvement, achieves many things at one stroke.Except that above-mentioned advantage, also have following benefit:
Innoxious and resource utilization: two kinds of materials of mud and agricultural wastes all can thoroughly transform, innoxious and resource utilization, compare with existing disposal options, disadvantageous effect to environment almost can be reduced to zero, solid product can transform into the low cost of market in urgent need, high efficiency low-cost sorbent, and awkward degradation of sewage is handled with some waste gas such as fume desulfuring and denitrifying processing scheme feasible, that have obvious economic advantages is provided;
Heat self balance: in mud, add agricultural wastes, can significantly improve the physicochemical property of mud, as viscosity, dry heat transfer, mass transfer process and kinetics, the heat transfer in the pyrolysis, mass transfer process and kinetics; Improve its composition,, improve organic content and calorific value, help realizing the self-equilibrating of pyrolytic process heat as remarkable reduction moisture content;
Energy-saving and emission-reduction: pyrolyzing sludge institute energy requirement is resolved, and can not cause energy consumption and CO because of extra use fossil oil additional heat
2The increase of discharging meets the policy of national energy-saving and emission-reduction;
Economic advantages are obvious: because methods of disposal such as existing mud landfill, burning need a large amount of fiscal subsidy, cost of disposal is up to 500~1000 yuan/t dewatered sludge, major cause is to take valuable land resources, equipment working cost height, need the additive decrementation energy etc., and the present invention is converted into sorbing material with mud and agricultural wastes combination treatment, can be used for the improvement of waste water and gas, it is worth and is higher than the value of using as the energy far away, and can fundamentally solve the expensive problem of thermal treatment methods such as existing sludge incineration, pyrolysis;
Save the soil, do not have environmental risk: owing to do not adopt the treatment process of landfill, can save a large amount of soils, eliminate the pathogenic risk of landfill and the agricultural secondary pollution that brings and potential simultaneously, social benefit could be estimated!
Accelerate drying sludge speed: after adding the agricultural wastes of pulverizing in the mud, destroyed the bonding state of mud, increased the surface-area of particle or agglomerate, heat transfer when helping drying and mass transfer can be accelerated dry and pyrolytic speed, cut down the consumption of energy.
Embodiment
Embodiment one, be 60% pulverizing straw with the butt weight percent and be that 40% municipal sludge mixes the butt weight percent; Secluding air is heated to 350 ℃, takes out solid product and cooling behind the constant temperature 10min, then solid product is pulverized, and promptly obtaining iodine number is the 404mg/g activated carbon product.
Embodiment two, be 40% pulverizing straw with the butt weight percent and be that 60% municipal sludge and weight percent are that 3.5% nitrate mixes the butt weight percent; Secluding air is heated to 400 ℃, takes out solid product and cooling behind the constant temperature 10min, then solid product is pulverized, and promptly obtaining iodine number is the 506mg/g activated carbon product.
Embodiment three, be that 28.50% pulverizing straw, butt weight percent are that 68% municipal sludge and weight percent are that 3.5% nitrate mixes with the butt weight percent; Secluding air is heated to 450 ℃, takes out solid product and cooling behind the constant temperature 10min, then solid product is pulverized, and promptly obtaining iodine number is the 425mg/g activated carbon product.
Embodiment four, be that 57% pulverizing straw, butt weight percent are that 38% municipal sludge and weight percent are that 5% nitrate mixes with the butt weight percent; Secluding air is heated to 500 ℃, takes out solid product and cooling behind the constant temperature 20min, then solid product is pulverized, and promptly obtaining iodine number is the 417mg/g activated carbon product.
Embodiment five, be that 57% pulverizing straw, butt weight percent are that 36.5% municipal sludge and weight percent are that 6.5% nitrate mixes with the butt weight percent; Secluding air is heated to 500 ℃, takes out solid product and cooling behind the constant temperature 20min, then solid product is pulverized, and promptly obtaining iodine number is the 439mg/g activated carbon product.
Embodiment six, be that 35.5% pulverizing wheat straw, butt weight percent are that 55% municipal sludge and weight percent are that 9.5% nitrate mixes with the butt weight percent; Secluding air is heated to 500 ℃, takes out solid product and cooling behind the constant temperature 20min, then solid product is pulverized, and promptly obtaining iodine number is the 420mg/g activated carbon product.
Claims (6)
1. municipal sludge and agricultural wastes process for preparing active carbon by co-decomposition is characterized in that:
A. agricultural wastes and municipal sludge are mixed by a certain percentage;
B. with said mixture secluding air heating at a certain temperature, and constant temperature takes out solid product and cools off after for some time;
C. solid product is pulverized, promptly obtained activated carbon product.
2. municipal sludge according to claim 1 and agricultural wastes copyrolysis preparing active carbon technology is characterized in that: interpolation butt weight percent is 1%~10% nitrate in the mixture of described agricultural wastes and municipal sludge.
3. municipal sludge according to claim 1 and agricultural wastes copyrolysis preparing active carbon technology, it is characterized in that: it is 10%~70% that described agricultural wastes account for mixture butt weight percent.
4. municipal sludge according to claim 1 and agricultural wastes copyrolysis preparing active carbon technology, it is characterized in that: it is 30%~90% that described municipal sludge accounts for mixture butt weight percent.
5. municipal sludge according to claim 1 and agricultural wastes copyrolysis preparing active carbon technology is characterized in that: it is 350~550 ℃ that the pyrolytic temperature is carried out in described secluding air heating.
6. municipal sludge according to claim 1 and agricultural wastes copyrolysis preparing active carbon technology, it is characterized in that: described constant temperature for some time is 10~20min.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2008101233836A CN101306812B (en) | 2008-05-26 | 2008-05-26 | Process for preparing active carbon by co-decomposition of city sludge and agricultural wastes |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2008101233836A CN101306812B (en) | 2008-05-26 | 2008-05-26 | Process for preparing active carbon by co-decomposition of city sludge and agricultural wastes |
Publications (2)
Publication Number | Publication Date |
---|---|
CN101306812A true CN101306812A (en) | 2008-11-19 |
CN101306812B CN101306812B (en) | 2011-05-11 |
Family
ID=40123523
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN2008101233836A Expired - Fee Related CN101306812B (en) | 2008-05-26 | 2008-05-26 | Process for preparing active carbon by co-decomposition of city sludge and agricultural wastes |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN101306812B (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102267695A (en) * | 2011-07-25 | 2011-12-07 | 中国石油天然气集团公司 | Method for preparing super activated charcoal from oily sludge |
CN104538644A (en) * | 2014-12-18 | 2015-04-22 | 广东省生态环境与土壤研究所 | Preparation method and application of sludge carbon plate electrode |
CN107651684A (en) * | 2016-07-26 | 2018-02-02 | 广州城辉环保科技有限公司 | A kind of method that carbonization manufacture activated carbon is pyrolyzed with municipal sludge |
CN108176359A (en) * | 2018-01-22 | 2018-06-19 | 济南大学 | A kind of preparation method of mixing waste charcoal |
CN109796013A (en) * | 2018-12-25 | 2019-05-24 | 南京工程学院 | A kind of multistage mesoporous activated carbon and preparation method thereof of the compound bombax cotton preparation of paper mill sludge |
CN114011852A (en) * | 2021-09-18 | 2022-02-08 | 昆明市生态环境科学研究院 | Harmless salinization treatment method for organic waste |
WO2024083260A1 (en) * | 2023-02-06 | 2024-04-25 | 生态环境部南京环境科学研究所 | Preparation method for and use of magnetic straw biochar material based on red mud enhancement |
-
2008
- 2008-05-26 CN CN2008101233836A patent/CN101306812B/en not_active Expired - Fee Related
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102267695A (en) * | 2011-07-25 | 2011-12-07 | 中国石油天然气集团公司 | Method for preparing super activated charcoal from oily sludge |
CN102267695B (en) * | 2011-07-25 | 2012-10-17 | 中国石油天然气集团公司 | Method for preparing super activated charcoal from oily sludge |
CN104538644A (en) * | 2014-12-18 | 2015-04-22 | 广东省生态环境与土壤研究所 | Preparation method and application of sludge carbon plate electrode |
CN104538644B (en) * | 2014-12-18 | 2017-03-29 | 广东省生态环境与土壤研究所 | A kind of preparation method and application of sludge carbon plate electrode |
CN107651684A (en) * | 2016-07-26 | 2018-02-02 | 广州城辉环保科技有限公司 | A kind of method that carbonization manufacture activated carbon is pyrolyzed with municipal sludge |
CN108176359A (en) * | 2018-01-22 | 2018-06-19 | 济南大学 | A kind of preparation method of mixing waste charcoal |
CN109796013A (en) * | 2018-12-25 | 2019-05-24 | 南京工程学院 | A kind of multistage mesoporous activated carbon and preparation method thereof of the compound bombax cotton preparation of paper mill sludge |
CN114011852A (en) * | 2021-09-18 | 2022-02-08 | 昆明市生态环境科学研究院 | Harmless salinization treatment method for organic waste |
WO2024083260A1 (en) * | 2023-02-06 | 2024-04-25 | 生态环境部南京环境科学研究所 | Preparation method for and use of magnetic straw biochar material based on red mud enhancement |
Also Published As
Publication number | Publication date |
---|---|
CN101306812B (en) | 2011-05-11 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN101306812B (en) | Process for preparing active carbon by co-decomposition of city sludge and agricultural wastes | |
CN103539326B (en) | A kind of Method for comprehensive treatment of sludge | |
CN101215488B (en) | Organic garbage and sludge mixed solid fuel and preparation method thereof | |
CN100390255C (en) | Sludge fuel stick and its prepn | |
CN101314163B (en) | Reclamation processing method for poor garbage | |
CN101225341A (en) | Method for producing bio-coal | |
CN105038822A (en) | Sludge clean treatment method and device | |
CN101746941A (en) | Biological drying method for treating dewatered sludge of urban sewage plant | |
Manyi-Loh et al. | Microbial anaerobic digestion: process dynamics and implications from the renewable energy, environmental and agronomy perspectives | |
CN104724694A (en) | Preparation method of rice straw biochar | |
CN102002410A (en) | Preparation method of composite biological particle fuel | |
CN102765866B (en) | Method for recycling urban sludge | |
CN101643687A (en) | Oil producing technology for co-pyrolysis of municipal sewage sludge and agricultural waste | |
CN102173888A (en) | Sludge carbon fertilizer and production method thereof | |
WO2016015640A1 (en) | Sandy and degraded soil modifier and preparation method and device therefor | |
CN102485663A (en) | Constructed wetland composite filling material for water treatment and preparation method thereof | |
CN101987984A (en) | Method for making compound solid waste derived fuel | |
CN102408177A (en) | Biological complex enzyme for sludge recycling and use method thereof | |
CN110885176A (en) | Method for treating and disposing sludge by utilizing microbial flocculant and microbial wall breaking | |
CN107880967A (en) | A kind of production method of sewage sludge biomass fuel combination | |
CN104760945A (en) | Preparation method of wheat straw charcoal | |
CN102533381A (en) | Method for preparing fuel by using sludge | |
CN101746940A (en) | Dewatering sludge alkaline type semi-desiccation processing method of sewage treatment plants | |
CN103739179A (en) | Sludge pre-treatment method | |
CN105695029A (en) | Biomass briquette and production method thereof |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
C06 | Publication | ||
PB01 | Publication | ||
C10 | Entry into substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
C14 | Grant of patent or utility model | ||
GR01 | Patent grant | ||
CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110511 Termination date: 20170526 |
|
CF01 | Termination of patent right due to non-payment of annual fee |