CN101935251A - Organic and compound fertilizer produced by domestic sludge and manufacture method thereof - Google Patents
Organic and compound fertilizer produced by domestic sludge and manufacture method thereof Download PDFInfo
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- CN101935251A CN101935251A CN2010102203248A CN201010220324A CN101935251A CN 101935251 A CN101935251 A CN 101935251A CN 2010102203248 A CN2010102203248 A CN 2010102203248A CN 201010220324 A CN201010220324 A CN 201010220324A CN 101935251 A CN101935251 A CN 101935251A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
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- Y02A40/20—Fertilizers of biological origin, e.g. guano or fertilizers made from animal corpses
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Abstract
The invention relates to an organic and compound fertilizer produced by domestic sludge and a manufacture method thereof, which is characterized in that the domestic sludge, pig manure, dove manure, rabbit manure, ground quick lime, calcium hydrophosphate, ammonium nitrate, lemery salt, sodium borate, green copperas, magnesium sulfate and an Li macromolecule and heavy metal trapping agent are used as raw materials, and are mixed and stirred by a blender to manufacture finished products. The organic and compound fertilizer contains nitrogen, phosphorus, potassium, a plurality of microelements and nutrients, such as organic acid, and the like, which can meet requirements on plant growth and has the obvious advantages of no pollution, low cost, good interest, secondary pollution prevention, environment prevention and land saving.
Description
Technical field
The present invention relates to a kind of organic composite fertilizer of producing with domestic sludge, specifically it is with sewage work's sludge discharged in handling the sanitary sewage process, through mechanical dehydration, powder after drying, abrasive dust, the sorting and pig, dove and rabbit excrement are the organic composite fertilizer of main material production again, belong to the waste treatment field.
The invention still further relates to the manufacture method of this organic composite fertilizer.
Background technology
Domestic sludge is that sanitary sewage that the municipal sewage plant adopts chemical process that the resident is discharged in daily life carries out the floating foam residue of mixing that the sedimentable matter that produces in the treating processes and sewage surface drift out.Mud is the solid part in the sewage, on the composition is being the very high a kind of semi-solid waste of a kind of boundary water ratio between inorganics and organism.A B-grade sewage treatment plant, the sludge quantity of generation accounts for 0.5%～1% of the total amount of disposing of sewage, and along with the fast development of China's economic society, urban population sustainable growth and urbanization rate progressively improve, and the demand of city central water supply amount increases year by year.The quantity discharged of sanitary sewage is increasing, and the generation of mud also increases sharply.The mud of a large amount of accumulation not only will take a large amount of soils, and objectionable constituent wherein such as heavy metal, pathogenic bacteria, parasitic ovum, organic pollutant and foul smell will become and influence one of urban environmental hygiene and endanger greatly.Effective treatment technology is all actively being sought by governments at all levels and relevant department, and China mainly is to adopt burying method to handle, to reduce the pollution to environment to the treatment process of domestic sludge at present.But, the composition more complicated of domestic sludge, the water ratio height, intractability is big, heavy metal particularly, if unprocessed direct landfill, will contaminated soil and groundwater resource, be easy to generate new secondary pollution, environment is caused serious harm.Long-term landfill need take a large amount of land resources, how properly scientifically domestic sludge to be carried out treatment and disposal, make it reach minimizing, stabilization, innoxious and resource utilization, become a big research topic of scientific and technical personnel's extensive concern of China and even whole world environment circle.
Summary of the invention
It is the organic composite fertilizer of main material production with domestic sludge, pig stable dung, pigeon dung and rabbit excrement that purpose of the present invention provides a kind of for the problem that solves above-mentioned existence just, thereby solved the pollution that domestic sludge, pig manure, pigeon dung and rabbit excrement produce environment, solved the resource regeneration of domestic sludge, pig manure, pigeon dung and rabbit excrement again, turn waste into wealth, change evil and be benefit, realized that the resource benign cycle of waste utilizes.
The present invention also provides the manufacture method of this organic composite fertilizer.
The objective of the invention is to realize by following technical proposal;
A kind of organic composite fertilizer of producing with domestic sludge, it is made by the following weight proportion raw material;
50～60 parts of domestic sludge powders
25～35 parts of pig stable dung powders
15～25 parts of pigeon dung powders
15～25 parts of rabbit excrement powders
12～18 parts of unslaked lime powders
10～15 parts of secondary calcium phosphates
5～8 parts in ammonium nitrate
5～8 parts of vitriolate of tartar
0.2～0.4 part of Sodium Tetraborate
1～2 part in ferrous sulfate
3～6 parts in sal epsom
0.5～0.8 part of Li high molecular heavy metals trapping agent,
To be sewage work carry out the floating foam residue that the throw out that produces in the treating processes and sewage surface drift out to sanitary sewage to described domestic sludge powder, after becoming ripe sludge through digestion process such as mechanical dehydrations, deodorizing, disinfection, make particle diameter again after drying, abrasive dust, the sorting and be powder less than-0.18mm;
Described pig stable dung is that pad soil, pad grass are discharged through the movable back of pig and the boar compost macerated in pigsty, is the powder less than-0.18mm through making particle diameter after deodorizing, disinfection, drying, abrasive dust, the sorting;
Described pigeon dung is to support the pigeon ight soil that discharge in cleaning process the dove field, is the powder less than-0.18mm through making particle diameter after deodorizing, disinfection, drying, abrasive dust, the sorting;
Described rabbit excrement is a kind of mixing ight soil that rabbit warren discharges in cleaning process, is the powder less than-0.18mm through making particle diameter after the deodorizing, disinfection, drying, abrasive dust, sorting.
A kind of manufacture method of the organic composite fertilizer of producing with domestic sludge, it is undertaken by following step:
With the domestic sludge powder of 50～60 weight parts, the pig stable dung powder of 25～35 weight parts, the pigeon dung powder of 15～25 weight parts, the rabbit excrement powder of 15～25 weight parts, the unslaked lime powder of 12～18 weight parts, the secondary calcium phosphate of 10～15 weight parts, the ammonium nitrate of 5～8 weight parts, the vitriolate of tartar of 5～8 weight parts, the Sodium Tetraborate of 0.2～0.4 weight part, the ferrous sulfate of 1～2 weight part, the sal epsom of 3～6 weight parts and the high molecular heavy metals trapping agent of 0.5～0.8 weight part is raw material, mixes through stirrer and makes domestic sludge organic composite fertilizer product.
Its powder particle diameter of described unslaked lime is the powder less than-0.18mm.
It is the main raw material of organic composite fertilizer that the present invention adopts domestic sludge, pig stable dung, pigeon dung, rabbit excrement, is that nutrient substance mainly comprises nitrogen, phosphorus, potassium three elements because domestic sludge itself contains nutrient for plants, protein, fat and soil ulmin etc.Nitrogen can promote the growth of plant stem-leaf; Phosphorus can excite the breeding of plant root, and accelerates maturing and increase plant are to the resistivity of disease and pest; Potassium can promote the growth vigor of plant, is to grow wooden limb, pulp, constitutes chlorophyllous important component.Mud also contains other required various trace elements of plant-growth, be applicable to the growth of various crops, analytical test after deliberation wherein contains total nitrogen content and is 2.63%, full phosphorus amount is 1.53%, full potassium amount is 0.25%, organic matter is 48.2% and trace elements such as copper, zinc.Nitrogen is proteinic element, the formation of involved in plant body inner chlorophyll, thus improve photosynthetic intensity, to increase the intravital carbohydrate of plant, can improve output.Phosphorus is the important component of plant nucleolus, and it is suitable for the differentiation and development of cell fission and each organ-tissue of plant, the important effect of particularly blossoming and bearing fruit, and it is the indispensable a kind of element of physiological metabolism activity in the plant materials.Phosphorus all has good effect to disease resistance, winter resistance and the drought-resistant ability that improves plant.Potassium can quicken the assimilation process of plant to carbonic acid gas, can promote the conversion of carbohydrate, proteinic synthetic and cell fission.Potassium can improve photosynthetic intensity, and the potassium element is in liberal supply in the soil, and sugar, starch, Mierocrystalline cellulose and the fat etc. that form in the plant materials are more, and the quality of not only output height, and product is good.Through producing soil ulmin behind the microbiological degradation, can promote the formation of soil aggregate after these nutritive elements are manured into soil, strengthen the soil water-reataining fertilizer-keeping ability, can improve and fertilizing soil, be fit to the growth of various crops.Selecting the pig stable dung for use is that the pig farm fills up in pigsty that soil, pad grass are discharged through the movable back of pig and the boar compost macerated, wherein contain abundant nitrogen, phosphorus, potassium and various trace elements, it is a kind of raw material of high-quality fertilizer, the nutrient conversion rate is fast, available nutrient can discharge in the crop whole growth phase reposefully, is made for thing and absorbs.Pigeon dung is to support a kind of pigeon ight soil that discharge in the cleaning process of feeding pigeon the dove field, and wherein nitrogen content is 1.76%, phosphorously is 1.78%, contains potassium to be 1%, contains organic material more than 30%.The various nutrient elements composition is arranged, be suitable as the raw material of fertilizer.The rabbit excrement is that a kind of rabbit that rabbit warren discharges in the cleaning process of feeding rabbit mixes ight soil, wherein contains higher nitrogen, phosphorus, potassium, becomes thoroughly decomposed easily, decomposes soon in being manured into soil, and is convenient to crop and absorbs.Utilize calcium lime powder to domestic sludge, the pig stable dung, pigeon dung, the sterilization that carries out disinfection of rabbit excrement, after making the reaction of moisture generation calcium hydroxide in calcium lime powder and the mud, can continue with mud in other materials further reaction takes place and adopt the agent of Li high molecular heavy metals trapping that domestic sludge is carried out huge legendary turtle and close processing, make the heavy metal element in the mud reach the reinforcement chemical stabilization, after digestion process, heavy metal element in the domestic sludge is captured, generate the huge legendary turtle compound of cross-linked structure, realize the efficient stableization of the heavy metal element in the domestic sludge, avoided the secondary pollution of heavy metal.
Because containing nitrogen, phosphorus, potassium three elements and organic element in the domestic sludge decomposes in the digestion process process of mud easily, produce labile factor, the present invention adopts ammonium nitrate, secondary calcium phosphate, vitriolate of tartar and Sodium Tetraborate for replenishing raw material, make the nutritive ingredient of nitrogen, phosphorus, potassium and the trace element of this domestic sludge organic composite fertilizer that guarantee arranged, can satisfy the needs of plant-growth.
The present invention carries out utilizing in the digestion process process ferrous sulfate to be reductive agent respectively to domestic sludge, pig stable dung, pigeon dung, rabbit excrement, sal epsom is the ferrous iron retention agent, domestic sludge, pig stable dung, pigeon dung and rabbit fecal energy are enough fully decomposed, reach rapid de-odorised purpose.
The manufacture method of domestic sludge organic composite fertilizer of the present invention, be with raw materials such as domestic sludge powder, pig stable dung powder, pigeon dung powder, rabbit excrement powder, unslaked lime powder, secondary calcium phosphate, ammonium nitrate, vitriolate of tartar, Sodium Tetraborate, ferrous sulfate, sal epsom and the agent of Li high molecular heavy metals trapping, adopt twin shaft paddle mixing and blending machine mixing stirring, make material in body, be subjected to mechanical effect and produce comprehensive compound cycle, carry out at extensively staggered no dead angle, thereby reach the purpose of even diffusive mixing fertilizer.Again the powder that mixes is transported to special-purpose storing silo, makes domestic sludge organic composite fertilizer product after employing full-automatic electronic computation weigh wrapping machine system packs.Thereby solved domestic sludge, pig stable dung, pigeon dung, rabbit excrement and handled difficult problem, realized the resource utilization recycle of domestic sludge, pig stable dung, pigeon dung, rabbit excrement, to reduce pollution to physical environment.
The domestic sludge organic composite fertilizer of producing according to the technology of the present invention, through the relevant quality examination department check of Country family's regulation, every technical indicator all reaches the technical requirement of the organic fertilizer that NY525-2002 People's Republic of China (PRC) industry standard stipulates.Detected result is as follows through the product quality inspection center of the Institute of Analysis of Guangdong Prov. Inst. of Ecological Environment ﹠ Soil Science and the Shenzhen institute of agricultural sciences:
The domestic sludge organic composite fertilizer detects: according to the industry standard Ny-2002 of the People's Republic of China (PRC) " organic fertilizer ":
Name of product: domestic sludge organic composite fertilizer
Detected result:
A) total nitrogen content is: 2.62～2.68%; B) content of tatal phosphorus is: 1.88～2.15%;
C) full potassium content is: 0.15～0.28%; D) organic content 41.6～46.9%;
E) moisture content: 15.6～17.5%; F) pH 5.8～6.6;
Owing to take technique scheme the technology of the present invention to have following advantage and effect:
A) domestic sludge organic composite fertilizer of the present invention, be to be main raw material and to add other trace elements with domestic sludge, pig stable dung, pigeon dung and rabbit excrement, it is the mixed fertilizer that a kind of multielement is formed, wherein contain various plant nutrients, organic matter discharges various nutrients such as nitrogen, phosphorus, potassium, trace element and organic acid and can be made for the thing growth needs in decomposition course;
B) activity of microorganism in the promotion soil, the required nutritive substance of microorganism in the soil directly or indirectly from organic substance, when using this organic composite fertilizer in the soil, can promote the vigorous activity of beneficial microorganism, helps crop growth;
C) improve the soil, the degradation production of organic matter and soil particle bond together and form granule, and these help to keep loosing soil, and more effectively water conservation and guarantor are fertile, the leaching loss of nutrient in the minimizing soil;
D) effect of activation phosphorus, the phosphorus compound in the soil generally is difficult for being quick-acting attitudes and is made for the thing absorption, and the phosphorus of the soil organism or humic mass-energy and insoluble is reacted, and quickens the dissolving of phosphorus, increases crop absorbing phosphorus.By constantly adding this organic fertilizer to soil, just continuous fertilizing soil makes plant growth luxuriant, increases output;
E) reduced the heavy metal content of domestic sludge, having solved domestic sludge needs the difficult problem that takies a large amount of land resources and cause secondary pollution easily in the landfill process, both protected environment, has saved the soil again;
F) production technique is simple, and three-waste free discharge meets national recycling economy and energy-saving and emission-reduction protection environment requirement spirit, and less investment, See imitate fast, cost is low, profitable.
Embodiment
Embodiment 1
Sewage work is carried out the floating foam residue that the throw out that produces in the treating processes and sewage surface drift out to sanitary sewage, after becoming ripe sludge through digestion process such as mechanical dehydrations, deodorizing, disinfection, make particle diameter again after drying, abrasive dust, the sorting and be domestic sludge powder less than-0.18mm;
The one boar compost of pad soil, pad grass in the pigsty being discharged through the movable back of pig and macerating is the pig stable dung powder less than-0.18mm through making particle diameter after deodorizing, disinfection, drying, abrasive dust, the sorting;
Rest the pigeon ight soil of dove field cleaning discharging, be pigeon dung powder less than-0.18mm through making particle diameter after deodorizing, disinfection, drying, abrasive dust, the sorting;
With the mixing ight soil of rabbit warren cleaning discharging, be rabbit excrement powder through making particle diameter after deodorizing, disinfection, drying, abrasive dust, the sorting less than-0.18mm,
Get the domestic sludge powder 50kg, pig stable dung powder 35kg, pigeon dung powder 15kg, rabbit excrement powder 25kg of above-mentioned preparation, preparing quick lime powder 12kg, secondary calcium phosphate 15kg, ammonium nitrate 5kg, vitriolate of tartar 8kg, Sodium Tetraborate 0.2kg, ferrous sulfate 2kg, sal epsom 3kg and Li high molecular heavy metals Pu collection agent 0.8kg again, adopt twin shaft paddle mixing and blending machine to mix above-mentioned raw materials and make domestic sludge organic composite fertilizer product, nitrogen content is after testing: 2.65%; Phosphorus content is: 1.88%; Potassium content is: 0.25%; Containing organic matter is: 41.6%; Water ratio: 16.8%; PH:5.8; All reach Ny-2002 People's Republic of China (PRC) industry standard.Be qualified product.
Embodiment 2
Get the domestic sludge powder 55kg, pig stable dung powder 30kg, pigeon dung powder 20kg, rabbit excrement powder 20kg of embodiment 1, preparing quick lime powder 15kg, secondary calcium phosphate 13kg, ammonium nitrate 6kg, vitriolate of tartar 6kg, Sodium Tetraborate 0.3kg, ferrous sulfate 1.5kg, sal epsom 5kg and Li high molecular heavy metals Pu collection agent 0.6kg again, adopt twin shaft paddle mixing and blending machine to mix above-mentioned raw materials, packing is made domestic sludge organic composite fertilizer product.Nitrogen content is after testing: 2.63%; Phosphorus content is: 2.04%; Potassium content is: 0.28%; Containing organic matter is: 46.9%; Water ratio: 15.6%; PH:6.1; All reach Ny-2002 People's Republic of China (PRC) industry standard.Be qualified product.
Embodiment 3
Get the domestic sludge powder 60kg, pig stable dung powder 25kg, pigeon dung powder 25kg, rabbit excrement powder 15kg of embodiment 1, preparing quick lime powder 18kg, secondary calcium phosphate 10kg, ammonium nitrate 8kg, vitriolate of tartar 5kg, Sodium Tetraborate 0.4kg, ferrous sulfate 1kg, sal epsom 6kg and Li high molecular heavy metals Pu collection agent 05kg again, adopt twin shaft paddle mixing and blending machine to mix above-mentioned raw materials, packing is made domestic sludge organic composite fertilizer product.Nitrogen content is after testing: 2.68%; Phosphorus content is: 2.15%; Potassium content is: 0.26%; Containing organic matter is: 46.2%; Water ratio: 17.5%; PH:6.5; All reach Ny-2002 People's Republic of China (PRC) industry standard.Be qualified product.
Embodiment 4
Get the domestic sludge powder 55kg, pig stable dung powder 35kg, pigeon dung powder 20kg, rabbit excrement powder 18kg of embodiment 1, preparing quick lime powder 14kg, secondary calcium phosphate 12kg, ammonium nitrate 7kg, vitriolate of tartar 7kg, Sodium Tetraborate 0.3kg, ferrous sulfate 1.5kg, sal epsom 4kg and Li high molecular heavy metals Pu collection agent 07kg again, adopt twin shaft paddle mixing and blending machine to mix above-mentioned raw materials, packing is made domestic sludge organic composite fertilizer product.Nitrogen content is after testing: 2.62%; Phosphorus content is: 2.10%; Potassium content is: 0.76%; Containing organic matter is: 45.2%; Water ratio: 16.5%; PH:6.4; All reach Ny-2002 People's Republic of China (PRC) industry standard.Be qualified product.
Claims (3)
1. organic composite fertilizer of producing with domestic sludge is characterized in that it is made by the following weight proportion raw material;
50～60 parts of domestic sludge powders
25～35 parts of pig stable dung powders
15～25 parts of pigeon dung powders
15～25 parts of rabbit excrement powders
12～18 parts of unslaked lime powders
10～15 parts of secondary calcium phosphates
5～8 parts in ammonium nitrate
5～8 parts of vitriolate of tartar
0.2～0.4 part of Sodium Tetraborate
1～2 part in ferrous sulfate
3～6 parts in sal epsom
Li high molecular heavy metals trapping agent .5～0.8 part,
To be sewage work carry out the floating foam residue that the throw out that produces in the treating processes and sewage surface drift out to sanitary sewage to described domestic sludge powder, after becoming ripe sludge through digestion process such as mechanical dehydrations, deodorizing, disinfection, make particle diameter again after drying, abrasive dust, the sorting and be powder less than-0.18mm;
Described pig stable dung is that pad soil, pad grass are discharged through the movable back of pig and the boar compost macerated in pigsty, is the powder less than-0.18mm through making particle diameter after deodorizing, disinfection, drying, abrasive dust, the sorting;
Described pigeon dung is to support the pigeon ight soil that discharge in cleaning process the dove field, is the powder less than-0.18mm through making particle diameter after deodorizing, disinfection, drying, abrasive dust, the sorting;
Described rabbit excrement is a kind of mixing ight soil that rabbit warren discharges in cleaning process, is the powder less than-0.18mm through making particle diameter after the deodorizing, disinfection, drying, abrasive dust, sorting.
2. as the manufacture method of a kind of organic composite fertilizer of producing with domestic sludge according to claim 1, it is characterized in that it is undertaken by following step:
With the domestic sludge powder of 50～60 weight parts, the pig stable dung powder of 25～35 weight parts, the pigeon dung powder of 15～25 weight parts, the rabbit excrement powder of 15～25 weight parts, the unslaked lime powder of 12～18 weight parts, the secondary calcium phosphate of 10～15 weight parts, the ammonium nitrate of 5～8 weight parts, the vitriolate of tartar of 5～8 weight parts, the Sodium Tetraborate of 0.2～0.4 weight part, the ferrous sulfate of 1～2 weight part, the sal epsom of 3～6 weight parts and the high molecular heavy metals trapping agent of 0.5～0.8 weight part is raw material, mixes through stirrer and makes domestic sludge organic composite fertilizer product.
3. domestic sludge organic composite fertilizer according to claim 1 and 2 is characterized in that its powder particle diameter of described unslaked lime is the powder less than-0.18mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010102203248A CN101935251B (en) | 2010-07-08 | 2010-07-08 | Organic and compound fertilizer produced by domestic sludge and manufacture method thereof |
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| CN2010102203248A CN101935251B (en) | 2010-07-08 | 2010-07-08 | Organic and compound fertilizer produced by domestic sludge and manufacture method thereof |
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| CN101935251A true CN101935251A (en) | 2011-01-05 |
| CN101935251B CN101935251B (en) | 2012-08-08 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103724140A (en) * | 2013-12-13 | 2014-04-16 | 枞阳县新少圩种粮农民专业合作社 | Animal excrement fermented fertilizer and preparation method thereof |
| CN107384419A (en) * | 2017-07-25 | 2017-11-24 | 成都新柯力化工科技有限公司 | The heavy metal aggregation fixative and preparation method of a kind of rehabilitating soil |
| CN110204379A (en) * | 2019-07-03 | 2019-09-06 | 中交一公局海威工程建设有限公司 | A kind of method and slow-release organic fertilizer preparing organic fertilizer using riverway sludge |
| RU2726650C1 (en) * | 2020-02-17 | 2020-07-15 | Виктор Степанович Бык | Method of organic and biological wastes processing into complex organomineral fertilizers |
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| CN1396142A (en) * | 2002-08-27 | 2003-02-12 | 王和勋 | Process for preparing composite organic fertilizer life garbage in urban area |
| CN1477085A (en) * | 2002-08-22 | 2004-02-25 | 车锡金 | Method for producing high-effective organic and inorganic composite fertilizer by quickly-curing urban domestic refuse |
| CN1709840A (en) * | 2004-06-19 | 2005-12-21 | 熊圣旱 | Disease-resistant weed-control efficient organic domestic refuse fertilizer and its preparing method |
| CN1752051A (en) * | 2004-09-22 | 2006-03-29 | 傅朝春 | Preparation method of organic fertilizer using garbage faeces as raw material |
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| US6273927B1 (en) * | 2000-05-18 | 2001-08-14 | Dae Youn Yang | Manufacturing method of fertilizer made from organic wastes |
| CN1477085A (en) * | 2002-08-22 | 2004-02-25 | 车锡金 | Method for producing high-effective organic and inorganic composite fertilizer by quickly-curing urban domestic refuse |
| CN1396142A (en) * | 2002-08-27 | 2003-02-12 | 王和勋 | Process for preparing composite organic fertilizer life garbage in urban area |
| CN1709840A (en) * | 2004-06-19 | 2005-12-21 | 熊圣旱 | Disease-resistant weed-control efficient organic domestic refuse fertilizer and its preparing method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103724140A (en) * | 2013-12-13 | 2014-04-16 | 枞阳县新少圩种粮农民专业合作社 | Animal excrement fermented fertilizer and preparation method thereof |
| CN107384419A (en) * | 2017-07-25 | 2017-11-24 | 成都新柯力化工科技有限公司 | The heavy metal aggregation fixative and preparation method of a kind of rehabilitating soil |
| CN110204379A (en) * | 2019-07-03 | 2019-09-06 | 中交一公局海威工程建设有限公司 | A kind of method and slow-release organic fertilizer preparing organic fertilizer using riverway sludge |
| RU2726650C1 (en) * | 2020-02-17 | 2020-07-15 | Виктор Степанович Бык | Method of organic and biological wastes processing into complex organomineral fertilizers |
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| CN101935251B (en) | 2012-08-08 |
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