CN102321677A - Method for manufacturing biogas and organic fertilizer by straw - Google Patents
Method for manufacturing biogas and organic fertilizer by straw Download PDFInfo
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- CN102321677A CN102321677A CN201110308304A CN201110308304A CN102321677A CN 102321677 A CN102321677 A CN 102321677A CN 201110308304 A CN201110308304 A CN 201110308304A CN 201110308304 A CN201110308304 A CN 201110308304A CN 102321677 A CN102321677 A CN 102321677A
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/20—Fertilizers of biological origin, e.g. guano or fertilizers made from animal corpses
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/133—Renewable energy sources, e.g. sunlight
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/50—Improvements relating to the production of bulk chemicals
- Y02P20/59—Biological synthesis; Biological purification
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/40—Bio-organic fraction processing; Production of fertilisers from the organic fraction of waste or refuse
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Abstract
The invention relates to the technical field of renewable energy resources, and especially relates to a method for manufacturing biogas and organic fertilizer by straw. The invention comprises the following steps of: (1) straw pretreatment; (2) straw retting; (3) anaerobic fermentation; (4) utilization of fermentation products. The invention significantly increases the degradation rate and biogas yield of straw, stabilizes the pH value of the fermentation system by combining with the bactericide pretreatment, facilitates the normal proceeding of anaerobic fermentation, and thus increases the methane content in the biogas. The invention greatly saves cost, and has almost no sewage discharge; the utilization rate of renewable energy resources is increased; the biogas produced by crop straw anaerobic fermentation is treated by purification procedures of desulphurization and dehydration, and thus can be used as fuel for resident cooking or for power generation; on the other hand, residues produced by straw anaerobic fermentation are separated into biogas residues and biogas slurry which can be prepared into solid and liquid organic fertilizer, and the organic fertilizer is easy to be absorbed by crops, and can greatly increase the comprehensive utilization rate of straw resources.
Description
Technical field
The present invention relates to field of renewable energy technology, refer in particular to a kind of method of utilizing stalk to make biogas and organic fertilizer.
Background technology
China is a large agricultural country, has agricultural straw resources such as profuse wheat straw, straw, beans stalk, corn stalk, at present; These stalk resources are except that lacking part as raw material of artifical plate and the edible fungus culturing base starting material etc., and major part is not also developed fully, and the treatment process in many places is on-site incinerations; Both full of smoke; Influencing the traffic on aerial and land, also cause serious atmospheric pollution, also is the huge waste of biomass resource simultaneously.On the other hand, because long-term a large amount of chemical fertilizer, the agricultural chemicals of using in the vast rural area of China, ventilation property, the sponginess of soil reduce greatly; Soil block is serious; The edatope of crop growth has received very big destruction, if the life-time service chemical fertilizer will certainly have a strong impact on the Sustainable development of agricultural.Therefore, in agriculture prodn, vigorously promote the use farm manure, fertilizer, lack usefulness or, will effectively promote the Sustainable development of agricultural without chemical fertilizer.
Utilize the technology of stalk anaerobic fermentation; Can reduce numerous environmental problems that crop straw burning brings from the source; Produced a large amount of ecological organic fertilizers simultaneously---natural pond slag and natural pond liquid, can effectively improve soil physical and chemical property, increase soil fertility; Reduce chemical fertilizer and use the environmental pollution that brings, promote ecological agriculture construction; In addition, the germ worm's ovum in the stalk, the crop pest problem of having avoided straw directly returning to field to cause have been killed through anaerobically fermenting.But traditional stalk fermentation technology all is to adopt wet fermentation technique, is about to stalk and mixes with organism such as human and animal excreta, trade effluents, under the effect of anerobes, forms methane.But because solids content is low in the wet-fermentation; The energy that causes being used to keeping temperature of reaction system is taken by aqueous solvent to a great extent; Especially in the north, consume the insulation that energy more than 30% is used for system, cause the mass energy waste; Limited the application and the popularization of biogas engineering greatly, and natural pond slag and natural pond liquid do not obtain good use.That have even cause the secondary pollution and the wasting of resources.
Summary of the invention
The objective of the invention is to improve and innovate to the shortcoming that exists in the background technology and problem; Provide a kind of and be the basis, can make biogas on the one hand, after cleaning section is handled with straw by dry fermentation product biogas method; Can be used as the fuel of resident's cooking or be used for generating; Simultaneously the resistates behind the stalk anaerobic fermentation is separated into natural pond slag and natural pond liquid, process solid-state and liquid fertilizer, be used to plant the method for utilizing stalk manufacturing biogas and organic fertilizer of farm crop.
The present invention includes following process step:
(1) pre-treatment of stalk:
1. crushed stalk:
Utilize stalk crasher with crushed stalk, length is 15-20mm after the crushed stalk;
2. stalk is wetting:
Adding water with the ratio of 1:1, will to pulverize the back stalk wetting, and the limit adds the waterside and turns over stalk, make wetting evenly; After the wetting completion stalk is placed 24h, stalk is fully absorbed water;
3. the system of mixing of raw material:
Add composite fungus agent, nitrogen fertilizer in the stalk after wetting, and stir and mix thoroughly, add water simultaneously; Wherein: amount of water is 1.5-2 a times of stalk weight, and making the stalk water ratio is 60%-70%, and the composite fungus agent addition is the 0.15-0.25% of agricultural crop straw quality, and the addition assurance of nitrogen fertilizer is 25: 1 for the C/N of fermented feed liquid.
(2) stack retting of stalk:
Will be through the stalk receipts heap after the last step handles, material stack height is 1-1.2m, every separated 20-30cm punches with sharp wooden stick around reaching at the stockpile top, with plastic cloth stockpile is covered and carries out stack retting; Stay the 10cm space in stockpile bottom apart from ground during covering, be beneficial to ventilation, the stack retting time is 3-4d in summer, winter 4-6d; After treating that the stacking temperature of charge reaches 55-65 ℃, keep stack retting 70-80h, long adularescent mycelia, stalk deliquescing are chocolate and can get into next step to the stalk surface.
(3) anaerobically fermenting:
The inoculum of stalk that stack retting is good and nitrogen fertilizer, 15%-25% mixes, and making the initial feed liquid total solids level of fermentation is 20%-30%, and fermented feed liquid pH value is 6.0-8.0, drops into then in the airtight fermentor tank, carries out anaerobically fermenting 30-40d under the normal temperature; Utilize sun power as thermal source in the fermenting process, anaerobic fermentation tank and material connecting tube thereof are incubated, lagging material is a polyurethane foam material, adds color steel protection.
(4) utilization of tunning:
1. the biogas of anaerobically fermenting generation stores after the cleaning section of dehydration, desulfurization is handled, and gives the user through pipe-line transportation, can be used as production and domestic energy;
2. the resistates of anaerobically fermenting generation separates into natural pond slag and natural pond liquid, processes solid-state and liquid fertilizer.
Stalk of the present invention is an agricultural crop straw, i.e. the fibre-bearing composition very high crop residues of farm crop results back under left comprises the stalk of cereal class, beans, potato class, oil plant class, crudefiber crop and cotton, sugarcane, tobacco, fruit crop.
Nitrogen fertilizer of the present invention is bicarbonate of ammonia or urea.
Inoculum of the present invention forms for the animal waste enrichment.
The present invention has the following advantages and beneficial effect:
1, the present invention has significantly improved the degradation rate and the gas production rate of stalk; Stalk can destroy the wax layer on stalk surface through composite fungus agent, stack retting pre-treatment; And then decomposition xylogen, semicellulose and cellulosic part draw bail; Make stalk soft, loose, be convenient to anaerobion and utilize, improved the degradation rate and the gas production rate of stalk greatly.In addition, the composite fungus agent pre-treatment can be stablized the pH value of fermentation system, helps normally carrying out of anaerobically fermenting, thereby has improved the methane content in the biogas.
2, the present invention provides cost savings greatly, because straw by dry fermentation produces biogas, can directly handle agricultural crop straw, has saved the pre-treatment cost; Water loss reduces greatly, saves water rate; Simultaneously, almost do not have sewage discharge, the WWT expense is low.
3, the present invention has improved the utilization ratio of renewable energy source, and the biogas that makes through anaerobic fermented crop grass is after the cleaning section of desulfurization, dehydration is handled, as the fuel of resident's cooking or be used for generating; On the other hand, the resistates that stalk anaerobic fermentation produces separates into natural pond slag and natural pond liquid, processes solid-state and liquid fertilizer.It is prone to be absorbed by crop, can significantly improve the physical behavior of soil, and retentiveness is strengthened, can chessom, and help the activity of soil microorganisms and the formation of soil aggregate, thereby improved the comprehensive utilization ratio of stalk resource greatly.
Description of drawings
Fig. 1 is a process flow sheet of the present invention.
Embodiment
Can know that by Fig. 1 process step of the present invention comprises:
(1) pre-treatment of stalk:
1. crushed stalk:
Utilize stalk crasher with crushed stalk, length is 15-20mm after the crushed stalk.
2. stalk is wetting:
It is wetting with crushing straw to add water with the ratio of 1:1, and the limit adds the waterside and turns over stalk, make it wetting evenly; After the wetting completion stalk is placed 24h, fully absorb water in order to stalk.
3. the system of mixing of raw material:
With the stalk limit after wetting add composite fungus agent, the nitrogen fat edges stirs and mixes thoroughly, adds water simultaneously, amount of water be stalk weight 1.5-2 doubly, making the stalk water ratio is 60%-70%.Wherein the composite fungus agent addition is the 0.15-0.25% of agricultural crop straw quality, and the addition of nitrogen fertilizer should guarantee that the C/N of fermented feed liquid is 25: 1;
(2) stack retting of stalk:
Moistening good stalk is received heap, and material stack height is 1-1.2m (can suitably increase winter).Whenever punch with sharp wooden stick at a distance from 20-30cm at the stockpile top and all around, with plastic cloth stockpile is covered and carry out stack retting; Stay the 10cm space in the stockpile bottom apart from ground during covering, (the stack retting time is 3-4d in summer to be beneficial to ventilation; Winter 4-6d).After treating that the stacking temperature of charge reaches 55-65 ℃, keep stack retting 70-80h, long adularescent mycelia, stalk deliquescing are chocolate and get final product to the stalk surface.
(3) anaerobically fermenting:
The inoculum (by volume calculation) of stalk that stack retting is good and an amount of nitrogen fertilizer, 15%-25% mixes; Make the initial feed liquid total solids level of fermentation (TS) be 20%-30%; Fermented feed liquid pH value is 6.0-8.0; Drop into then in the airtight fermentor tank, carry out anaerobically fermenting 30-40d under the normal temperature.(utilize sun power as thermal source, anaerobic fermentation tank and material connecting tube thereof are incubated, lagging material is a polyurethane foam material, adds color steel protection.）
(4) utilization of tunning:
1. the biogas of anaerobically fermenting generation stores after the cleaning section of dehydration, desulfurization is handled, and gives the user through pipe-line transportation, can be used as production and domestic energy.
2. the resistates of anaerobically fermenting generation separates into natural pond slag and natural pond liquid, processes solid-state and liquid fertilizer.
Wherein, above-mentioned agricultural crop straw is the fibre-bearing composition very high crop residues of farm crop results back under left, comprises the stalk of various crop such as cereal class, beans, potato class, oil plant class, crudefiber crop and cotton, sugarcane, tobacco, melon and fruit.Composite fungus agent is produced by Hebaiyi Ecological Energy Sci., & Tech. Development Co., Ltd., Beijing.Nitrogen fertilizer is bicarbonate of ammonia or urea.Described inoculum forms for the animal waste enrichment.
Below in conjunction with embodiment the present invention is further specified, but be not limited thereto.Raw material explanation is as follows: agricultural crop straw is air-dry cotton stalk, its water cut 10.85%, slightly organism 56.54 %, nitrogen 0.941%, phosphorus 0.146%, potassium 0.910%, C/N ratio be 34, ash content 5.90.Composite fungus agent is that Hebaiyi Ecological Energy Sci., & Tech. Development Co., Ltd., Beijing produces.Nitrogen fertilizer is bicarbonate of ammonia or urea.Inoculum forms for the animal waste enrichment.
Raw material consumption among the embodiment, all ratios are mass ratio, and all per-cents are mass percent.
Embodiment 1:
(1) pre-treatment of stalk:
1. crushed stalk:
Utilize stalk crasher with crushed stalk, length is 20mm after the crushed stalk.
2. stalk is wetting:
It is wetting with crushing straw to add water with the ratio of 1:1, and the limit adds the waterside and turns over stalk, with guarantee wetting evenly; After the wetting completion stalk is placed 24h, fully absorb water in order to stalk.
3. the system of mixing of raw material:
With the stalk limit after wetting add composite fungus agent, the bicarbonate of ammonia limit is stirred and is mixed thoroughly, adds water simultaneously, amount of water is 2 times of stalk weight, making the stalk water ratio is 60%; Wherein the composite fungus agent addition is 0.25% of an agricultural crop straw quality, and the addition of bicarbonate of ammonia should guarantee that the C/N of fermented feed liquid is 25: 1;
(2) stack retting of stalk:
Moistening good stalk is received heap, and material stack height is 1m.Whenever punch with sharp wooden stick at a distance from 20cm at the stockpile top and all around, with plastic cloth stockpile is covered and carry out stack retting; Stay the 10cm space in the stockpile bottom apart from ground during covering, be beneficial to ventilation.After treating that the stacking temperature of charge reaches 55 ℃, keep stack retting 70h, long adularescent mycelia, stalk deliquescing are chocolate and get final product to the stalk surface.
(3) anaerobically fermenting:
The stalk that stack retting is good and certain bicarbonate of ammonia, 20% inoculum (by volume calculation) mix; The initial feed liquid total solids level (TS) that ferments is 30%; Fermented feed liquid pH value is 7.2, drops into then in the airtight fermentor tank, carries out anaerobically fermenting 30d under the normal temperature.Utilize sun power as thermal source in the fermenting process, anaerobic fermentation tank and material connecting tube thereof are incubated, lagging material is a polyurethane foam material, adds color steel protection.
(4) utilization of tunning:
1. the biogas of anaerobically fermenting generation stores after the cleaning section of dehydration, desulfurization is handled, and can be used as through pipe-line transportation and produces and domestic energy.
2. the resistates of anaerobically fermenting generation separates into natural pond slag and natural pond liquid, processes solid-state and liquid fertilizer.
Embodiment 2:
(1) pre-treatment of stalk:
1. crushed stalk:
Utilize stalk crasher with crushed stalk, length is 20mm after the crushed stalk.
2. stalk is wetting:
It is wetting with crushing straw to add water with the ratio of 1:1, and the limit adds the waterside and turns over stalk, with guarantee wetting evenly; After the wetting completion stalk is placed 24h, fully absorb water in order to stalk.
3. the system of mixing of raw material:
With the stalk limit after wetting add composite fungus agent, the bicarbonate of ammonia limit is stirred and is mixed thoroughly, adds water simultaneously, amount of water is 2 times of stalk weight, making the stalk water ratio is 55%; Wherein the composite fungus agent addition is 0.15% of an agricultural crop straw quality, and the addition of bicarbonate of ammonia should guarantee that the C/N of fermented feed liquid is 25: 1.
(2) stack retting of stalk:
Moistening good stalk is received heap, and material stack height is 1.5m.Whenever punch with sharp wooden stick at a distance from 20cm at the stockpile top and all around, with plastic cloth stockpile is covered and carry out stack retting; Stay the 10cm space in the stockpile bottom apart from ground during covering, be beneficial to ventilation.After treating that the stacking temperature of charge reaches 60 ℃, keep stack retting 80h, long adularescent mycelia, stalk deliquescing are chocolate and get final product to the stalk surface.
(3) anaerobically fermenting:
The stalk that stack retting is good and certain bicarbonate of ammonia, 25% inoculum (by volume calculation) mix; The initial feed liquid total solids level (TS) that ferments is 40%; Fermented feed liquid pH value is 7.6, drops into then in the airtight fermentor tank, carries out anaerobically fermenting 40d under the normal temperature.Utilize sun power as thermal source in the fermenting process, anaerobic fermentation tank and material connecting tube thereof are incubated, lagging material is a polyurethane foam material, adds color steel protection.
(4) utilization of tunning:
1. the biogas of anaerobically fermenting generation stores after the cleaning section of dehydration, desulfurization is handled, and can be used as through pipe-line transportation and produces and domestic energy.
2. the resistates of anaerobically fermenting generation separates into natural pond slag and natural pond liquid, processes solid-state and liquid fertilizer.
Comparative Examples:
In the pre-treatment of stalk, do not add composite fungus agent, directly carry out anaerobically fermenting.
With the foregoing description 1,2 and Comparative Examples, at 8m
3Experimentize in the fermentor tank, methane content in the tunning biogas is detected, the result is following:
[0038]With above EXAMPLE l, 2 and the tunning natural pond slag of Comparative Examples in the experimental plot, experimentize, effect is following:
Supplying the examination cotton variety is " cotton No. 13 of Hunan ", and soil is the experimental plot.Supplying examination leaf mustard kind is " Huarong leaf mustard ", the experimental plot cultivation.All natural pond slags are all used as base manure, and application process is the disposable bottom that applies planting furrow before cotton and leaf mustard transplanting, with the rice shoot of planting after the part mixing with soil.Amount of application, 1500 kilograms every mu in cotton, 1800 kilograms every mu in leaf mustard.
Embodiment of the present invention only is the description that preferred implementation of the present invention is carried out; Be not that design of the present invention and scope are limited; Under the prerequisite that does not break away from design philosophy of the present invention, engineering technical personnel make technical scheme of the present invention in this area various modification and improvement all should fall into protection scope of the present invention; The technology contents that the present invention asks for protection all is documented in claims.
Claims (4)
1.
OnePlant and utilize stalk to make the method for biogas and organic fertilizer, it is characterized in that comprising following process step:
(1) pre-treatment of stalk:
1. crushed stalk:
Utilize stalk crasher with crushed stalk, length is 15-20mm after the crushed stalk;
2. stalk is wetting:
Adding water with the ratio of 1:1, will to pulverize the back stalk wetting, and the limit adds the waterside and turns over stalk, make wetting evenly; After the wetting completion stalk is placed 24h, stalk is fully absorbed water;
3. the system of mixing of raw material:
Add composite fungus agent, nitrogen fertilizer in the stalk after wetting, and stir and mix thoroughly, add water simultaneously; Wherein: amount of water is 1.5-2 a times of stalk weight, and making the stalk water ratio is 60%-70%, and the composite fungus agent addition is the 0.15-0.25% of agricultural crop straw quality, and the addition assurance of nitrogen fertilizer is 25: 1 for the C/N of fermented feed liquid;
(2) stack retting of stalk:
Will be through the stalk receipts heap after the last step handles, material stack height is 1-1.2m, every separated 20-30cm punches with sharp wooden stick around reaching at the stockpile top, with plastic cloth stockpile is covered and carries out stack retting; Stay the 10cm space in stockpile bottom apart from ground during covering, be beneficial to ventilation, the stack retting time is 3-4d in summer, winter 4-6d; After treating that the stacking temperature of charge reaches 55-65 ℃, keep stack retting 70-80h, long adularescent mycelia, stalk deliquescing are chocolate and can get into next step to the stalk surface;
(3) anaerobically fermenting:
The inoculum of stalk that stack retting is good and nitrogen fertilizer, 15%-25% mixes, and making the initial feed liquid total solids level of fermentation is 20%-30%, and fermented feed liquid pH value is 6.0-8.0, drops into then in the airtight fermentor tank, carries out anaerobically fermenting 30-40d under the normal temperature; Utilize sun power as thermal source in the fermenting process, anaerobic fermentation tank and material connecting tube thereof are incubated, lagging material is a polyurethane foam material, adds color steel protection;
(4) utilization of tunning:
1. the biogas of anaerobically fermenting generation stores after the cleaning section of dehydration, desulfurization is handled, and gives the user through pipe-line transportation, can be used as production and domestic energy;
2. the resistates of anaerobically fermenting generation separates into natural pond slag and natural pond liquid, processes solid-state and liquid fertilizer.
2. the method for utilizing stalk to make biogas and organic fertilizer according to claim 1; It is characterized in that described stalk is an agricultural crop straw; Be the fibre-bearing composition very high crop residues of farm crop results back under left, comprise the stalk of cereal class, beans, potato class, oil plant class, crudefiber crop and cotton, sugarcane, tobacco, fruit crop.
3. the method for utilizing stalk to make biogas and organic fertilizer according to claim 1 is characterized in that described nitrogen fertilizer is bicarbonate of ammonia or urea.
4. the method for utilizing stalk to make biogas and organic fertilizer according to claim 1 is characterized in that described inoculum forms for the animal waste enrichment.
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| CN108424185A (en) * | 2018-04-17 | 2018-08-21 | 湖北向上食品股份有限公司 | A method of utilizing stalk composting Pure organic fertilizer |
| CN108504696A (en) * | 2018-05-17 | 2018-09-07 | 北京化工大学 | A kind of method of high-efficiency resource recycling tabacco straw |
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| CN112679256A (en) * | 2021-01-13 | 2021-04-20 | 上海市环境科学研究院 | Preparation method of straw biogas residue-based composite microbial fertilizer |
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