CN110606775A - Method for preparing fertilizer by fermenting river sludge and waste garden biomass - Google Patents
Method for preparing fertilizer by fermenting river sludge and waste garden biomass Download PDFInfo
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- 239000010802 sludge Substances 0.000 title claims abstract description 58
- 239000002028 Biomass Substances 0.000 title claims abstract description 53
- 239000002699 waste material Substances 0.000 title claims abstract description 53
- 239000003337 fertilizer Substances 0.000 title claims abstract description 51
- 238000000034 method Methods 0.000 title claims abstract description 30
- 230000000813 microbial effect Effects 0.000 claims abstract description 41
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 40
- QJZYHAIUNVAGQP-UHFFFAOYSA-N 3-nitrobicyclo[2.2.1]hept-5-ene-2,3-dicarboxylic acid Chemical compound C1C2C=CC1C(C(=O)O)C2(C(O)=O)[N+]([O-])=O QJZYHAIUNVAGQP-UHFFFAOYSA-N 0.000 claims abstract description 23
- 239000004021 humic acid Substances 0.000 claims abstract description 23
- 239000005416 organic matter Substances 0.000 claims abstract description 17
- 238000001035 drying Methods 0.000 claims abstract description 10
- 238000002156 mixing Methods 0.000 claims abstract description 10
- 239000003077 lignite Substances 0.000 claims description 14
- 241000894006 Bacteria Species 0.000 claims description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- 241000186361 Actinobacteria <class> Species 0.000 claims description 9
- 241000589151 Azotobacter Species 0.000 claims description 9
- 241000194108 Bacillus licheniformis Species 0.000 claims description 9
- 241000194107 Bacillus megaterium Species 0.000 claims description 9
- 244000063299 Bacillus subtilis Species 0.000 claims description 9
- 235000014469 Bacillus subtilis Nutrition 0.000 claims description 9
- 241000193417 Brevibacillus laterosporus Species 0.000 claims description 9
- 241000108664 Nitrobacteria Species 0.000 claims description 9
- 230000000243 photosynthetic effect Effects 0.000 claims description 9
- 239000002994 raw material Substances 0.000 claims description 8
- 241000881860 Paenibacillus mucilaginosus Species 0.000 claims description 5
- 239000007633 bacillus mucilaginosus Substances 0.000 claims description 5
- 241001412225 Firmiana simplex Species 0.000 claims description 3
- 240000008375 Hymenaea courbaril Species 0.000 claims description 3
- 241000167847 Koelreuteria paniculata Species 0.000 claims description 3
- 235000008331 Pinus X rigitaeda Nutrition 0.000 claims description 3
- 235000011613 Pinus brutia Nutrition 0.000 claims description 3
- 241000018646 Pinus brutia Species 0.000 claims description 3
- 241000219000 Populus Species 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 241000208367 Euonymus Species 0.000 claims description 2
- 241000124033 Salix Species 0.000 claims description 2
- 241001106462 Ulmus Species 0.000 claims description 2
- 239000002068 microbial inoculum Substances 0.000 claims 2
- 238000000855 fermentation Methods 0.000 abstract description 13
- 230000004151 fermentation Effects 0.000 abstract description 13
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 4
- DLYUQMMRRRQYAE-UHFFFAOYSA-N tetraphosphorus decaoxide Chemical compound O1P(O2)(=O)OP3(=O)OP1(=O)OP2(=O)O3 DLYUQMMRRRQYAE-UHFFFAOYSA-N 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- CHWRSCGUEQEHOH-UHFFFAOYSA-N potassium oxide Chemical compound [O-2].[K+].[K+] CHWRSCGUEQEHOH-UHFFFAOYSA-N 0.000 abstract description 3
- 238000006243 chemical reaction Methods 0.000 abstract description 2
- 238000009776 industrial production Methods 0.000 abstract description 2
- 229910052757 nitrogen Inorganic materials 0.000 abstract description 2
- 229910001950 potassium oxide Inorganic materials 0.000 abstract description 2
- 235000021049 nutrient content Nutrition 0.000 abstract 1
- 239000002361 compost Substances 0.000 description 5
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical group O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 239000010865 sewage Substances 0.000 description 3
- 239000002689 soil Substances 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000010813 municipal solid waste Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 241000931143 Gleditsia sinensis Species 0.000 description 1
- 241000218998 Salicaceae Species 0.000 description 1
- 244000228451 Stevia rebaudiana Species 0.000 description 1
- 235000006092 Stevia rebaudiana Nutrition 0.000 description 1
- 241000223259 Trichoderma Species 0.000 description 1
- 241000218220 Ulmaceae Species 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 229910052612 amphibole Inorganic materials 0.000 description 1
- 229910052785 arsenic Inorganic materials 0.000 description 1
- 230000001580 bacterial effect Effects 0.000 description 1
- 230000004071 biological effect Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- 229910001919 chlorite Inorganic materials 0.000 description 1
- 229910052619 chlorite group Inorganic materials 0.000 description 1
- QBWCMBCROVPCKQ-UHFFFAOYSA-N chlorous acid Chemical compound OCl=O QBWCMBCROVPCKQ-UHFFFAOYSA-N 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- YGANSGVIUGARFR-UHFFFAOYSA-N dipotassium dioxosilane oxo(oxoalumanyloxy)alumane oxygen(2-) Chemical compound [O--].[K+].[K+].O=[Si]=O.O=[Al]O[Al]=O YGANSGVIUGARFR-UHFFFAOYSA-N 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000010433 feldspar Substances 0.000 description 1
- 230000002538 fungal effect Effects 0.000 description 1
- 239000010921 garden waste Substances 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 230000002262 irrigation Effects 0.000 description 1
- 238000003973 irrigation Methods 0.000 description 1
- 239000010806 kitchen waste Substances 0.000 description 1
- 229910052745 lead Inorganic materials 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 229910052651 microcline Inorganic materials 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910052627 muscovite Inorganic materials 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 239000003895 organic fertilizer Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229910052655 plagioclase feldspar Inorganic materials 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 230000007096 poisonous effect Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 238000009270 solid waste treatment Methods 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
- 229910052902 vermiculite Inorganic materials 0.000 description 1
- 239000010455 vermiculite Substances 0.000 description 1
- 235000019354 vermiculite Nutrition 0.000 description 1
- 229910001845 yogo sapphire Inorganic materials 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
- C05F17/00—Preparation of fertilisers characterised by biological or biochemical treatment steps, e.g. composting or fermentation
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
- C05F7/00—Fertilisers from waste water, sewage sludge, sea slime, ooze or similar masses
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Biochemistry (AREA)
- Biotechnology (AREA)
- Health & Medical Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Microbiology (AREA)
- Molecular Biology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Fertilizers (AREA)
Abstract
The invention provides a method for preparing a fertilizer by fermenting river sludge and waste garden biomass. The method comprises the following steps: uniformly mixing the river sludge, the waste garden biomass and the humic acid, adding a microbial agent, fermenting for 7 days under an anaerobic condition at the temperature of 25-50 ℃ and the humidity of 30-70%, and granulating and drying to obtain the biological fertilizer. The method provided by the invention can solve the problem that the river sludge is piled up in large quantity and the surface pollutes the environment, and improves the fermentation effect of the sludge and the biomass. The organic matter content of the fertilizer obtained by the invention reaches 40%, the organic matter conversion rate is higher, the total nutrient content (total nitrogen, available phosphorus pentoxide and potassium oxide) after fermentation can reach 5%, the production condition is simpler, and the industrial production can be carried out.
Description
Technical Field
The invention relates to the technical field of organic fertilizers, in particular to a method for preparing a fertilizer by fermenting river sludge and waste garden biomass.
Background
River sludge is a byproduct of urban municipal drainage systems, and because the river sludge can affect the normal play of various functions of rivers such as flood control, drainage, irrigation, water supply, navigation and the like, the river dredging is performed to recover the normal functions of the river. A large amount of desilted river sludge is piled on the ground surface and can release a large amount of pollutants under the influence of external factors; if the sewage flows into the river again, the water body environment is subjected to secondary pollution; and the sludge has obvious foul smell and is scattered in the air, thus seriously affecting the air environment. Therefore, river sludge accumulation is a great problem in municipal solid waste treatment.
The river sludge is used as fertilizer or soil improving material for farm land, garden, land improvement, etc. The land utilization of the sludge is always deeply valued by economically developed countries such as the United states, European Union, Japan and the like, and China also releases corresponding national standards for the land utilization of the sludge of sewage treatment plants in 2009, such as: GB/T24600-2009 sludge treatment mud for land improvement, GB/T24600-2009 sludge treatment mud for landscaping and the like.
CN 109160860A discloses a method for resource utilization of urban kitchen waste, agricultural and forestry waste, river sludge and municipal sludge in a combined manner, the raw materials are treated, activated carbon and hydrogen peroxide are added for compost fermentation, the compost fermentation product is fermented at the temperature of 50 ~ 70 ℃ for 14 ~ 28 days after being compressed and stored, the compost fermentation product obtained after decomposition is deodorized, cooled, dried and cooled to obtain an organic fertilizer, a seedling culture substrate is prepared by fermenting sludge through functional microorganisms such as Chenlihua, and the river sludge, compost strains, stevia rebaudiana compost and vermiculite are mixed and fermented according to a ratio, so that the physical and biological properties of the sludge substrate can be improved through microbial fermentation, the seedling culture quality is improved at the same time, and two optimal strains of a fungal strain Trichoderma harziamm T83 and a bacterial strain Bacusanyanoliacetin are selected.
River sludge and waste garden biomass can be used as raw materials of fertilizers, but the conventional fertilizer effect is poor when the fertilizer is applied independently, and the fertilizer can be effectively decomposed and absorbed by soil for a long time. CN 109160860A uses poisonous hydrogen peroxide in the disinfection process, the fermentation time is too long, the temperature requirement is too high, and do not make any index test, can't prove the validity of fertilizer made. The strain of the seedling substrate obtained by fermentation of Chenlihua and the like has certain limitation, and only a small amount of strains have promotion effect on the seedling quality.
Disclosure of Invention
The invention aims to provide a method for preparing a fertilizer by fermenting river channel sludge and waste garden biomass, which can solve the problem that the surface of a large amount of piled river channel sludge pollutes the environment and improve the fermentation effect of the sludge and the biomass.
The method comprises the following steps:
uniformly mixing the river sludge, the waste garden biomass and the humic acid, adding a microbial agent, fermenting for 7 days under an anaerobic condition at the temperature of 25-50 ℃ and the humidity of 30-70%, and granulating and drying to obtain the biological fertilizer.
The invention has simple experimental conditions, moderate fermentation temperature and short fermentation period (only 7 days), and can be used for industrial production.
In a preferred embodiment of the present invention, the humidity is controlled to be 40 to 60%, and the temperature is controlled to be 25 to 40 ℃.
In a preferred embodiment of the invention, the river sludge has a water content of 30 to 40wt% and a pH of 6.5 to 7. In the embodiment of the invention, the river sludge is collected from the upstream river bottom of the North canal of Tongzhou, and the main chemical component is SiO2、Al2O3、Fe2O3CaO and K2O and the like, wherein the main mineral components are quartz, plagioclase, microcline feldspar, muscovite, amphibole and chlorite, and the contents of heavy metal elements Cd, Hg, Pb, Cr, As, Ni, Cu and Zn all meet the standard GB/T24600-2009 sludge for sludge disposal-soil improvement of urban sewage treatment plants.
In a preferred embodiment of the present invention, the organic matter content of the waste garden biomass is 40 to 60%. Wherein the organic matter content varies slightly with the type of the collected material. The waste landscape biomass comprises a mixture of deciduous leaves and/or branches of trees and shrubs; the arbor includes but is not limited to one or more of pine needle, phoenix tree, poplar, goldenrain tree, elm, locust tree and willow; the shrubs include gleditschia horrida and/or euonymus.
In a preferred embodiment of the present invention, the humic acid is lignite humic acid, and the lignite humic acid which is activated and separated and extracted from lignite contains about 70% of organic matter.
In a preferred embodiment of the invention, the microbial agent comprises bacillus subtilis, bacillus licheniformis, bacillus megaterium, bacillus laterosporus, bacillus mucilaginosus, photosynthetic bacteria, actinomycetes, azotobacter and nitrobacteria, wherein the microbial agent comprises 13 ~ 15 parts of bacillus subtilis, 6 ~ 7 parts of bacillus licheniformis, 15 ~ 16 parts of bacillus megaterium, 8 ~ 10 parts of bacillus laterosporus, 8 ~ 10 parts of bacillus mucilaginosus, 10 ~ 12 parts of photosynthetic bacteria, 3 ~ 5 parts of actinomycetes, 8 ~ 10 parts of azotobacter and 5 ~ 7 parts of nitrobacteria by weight, and the total weight of the microbial agent is 83 parts, ~ 90 parts.
In a preferred embodiment of the invention, 40 ~ parts by weight of river sludge, 10 ~ parts by weight of waste garden biomass and 1 8510 parts by weight of humic acid are uniformly mixed, 1 ~ parts by weight of microbial agent is added, preferably, 50 ~ parts by weight of river sludge, 20 ~ parts by weight of waste garden biomass and 5 ~ parts by weight of humic acid are uniformly mixed, 3 ~ parts by weight of microbial agent is added, namely, the 3 ~ parts by weight of microbial agent is evenly divided into 83 ~ parts by weight to calculate the weight of each strain, further preferably, 50 ~ parts by weight of river sludge, 30 ~ parts by weight of waste garden biomass and 8 ~ parts by weight of humic acid are evenly mixed, 3 ~ parts by weight of microbial agent is evenly divided, the 3 ~ parts by weight of microbial agent is evenly divided into 85 parts by weight to calculate the weight of each strain in the microbial agent, 68650 parts by weight of river sludge, 358 parts by weight of humic acid is evenly divided into 3 parts by weight of microbial agent, 35 parts by weight of the 3 parts by weight of garden sludge, 35 parts by weight of the 3 parts by weight of the microbial agent, 365 parts by weight of the waste garden biomass, and 365 parts by weight of the microbial agent are evenly divided into ~ parts by weight of the 365 parts by weight of the strain.
In the present invention, the weight parts may be weight units known in the art, such as μ g, mg, g, kg, etc., or multiples thereof, such as 1/10, 1/100, 10, 100, etc.
Another object of the present invention is to provide a fertilizer prepared by the above method.
The method utilizes the river channel sludge and the waste garden biomass to ferment and prepare the fertilizer, effectively utilizes the urban solid waste river channel sludge and the urban waste garden waste biomass, can recycle waste resources, and has lower raw material cost and production investment. The raw materials of the invention are solid wastes which are easy to obtain, almost contain no harmful substances and have lower cost. The organic matter content of the fertilizer obtained by the invention can reach 40%, the fertilizer has higher organic matter conversion rate, the total nutrient (total nitrogen, available phosphorus pentoxide and potassium oxide) content after fermentation in the embodiment of the invention can reach 5%, the production condition is simpler, and the fertilizer can be industrially produced.
Detailed Description
The following examples are given to further illustrate the embodiments of the present invention. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
Unless otherwise specified, the technical means used in the examples are conventional means well known to those skilled in the art, and the raw materials used are commercially available.
In the embodiment of the invention, the river sludge is collected from the upstream river bottom of the north canal of Tongzhou. The waste garden biomass is mainly a mixture of fallen leaves and branches of arbors such as pine needles, phoenix trees, poplar trees, goldenrain trees, elms, locust trees, willows and the like and shrubs such as gleditsia sinensis, dulcis and the like, and the content of organic matters is about 50%. Lignite humic acid contains about 70wt% organic matter.
Example 1
The embodiment provides a method for preparing a fertilizer by fermenting river sludge and waste garden biomass, which comprises the following steps:
the first step is as follows: collecting waste garden biomass, and uniformly crushing the waste garden biomass by using a crusher;
the second step is that: uniformly mixing 70 parts of river sludge, 20 parts of waste garden biomass and 5 parts of lignite humic acid by weight, and adding 3 parts of microbial agent; wherein the microbial agent consists of bacillus subtilis, bacillus licheniformis, bacillus megaterium, bacillus laterosporus, colloidal spore bacteria, photosynthetic bacteria, actinomycetes, azotobacter and nitrobacteria, and the microbial agent is calculated by 85 parts by weight (namely, the 3 parts by weight of the microbial agent are divided into 85 small parts by weight): 15 parts of bacillus subtilis, 7 parts of bacillus licheniformis, 15 parts of bacillus megaterium, 8 parts of bacillus laterosporus, 10 parts of colloidal spore bacteria, 10 parts of photosynthetic bacteria, 5 parts of actinomycetes, 10 parts of azotobacter and 5 parts of nitrobacteria.
The third step: under anaerobic condition, controlling humidity at 40% and temperature at average 25 deg.C, fermenting for 7 days;
the fourth step: and (4) granulating the fertilizer fermented for 7 days in a granulator, and drying to obtain the fertilizer.
The pH of the fertilizer obtained in this example was 7.5, the water content was 27%, and the organic matter content was 15.4%.
Example 2
The embodiment provides a method for preparing a fertilizer by fermenting river sludge and waste garden biomass, which comprises the following steps:
the first step is as follows: collecting waste garden biomass, and uniformly crushing the waste garden biomass by using a crusher;
the second step is that: uniformly mixing 50 parts by weight of river sludge, 40 parts by weight of waste garden biomass and 10 parts by weight of lignite humic acid, and adding 5 parts by weight of microbial agent; wherein the microbial agent is the same as the microbial agent in example 1;
the third step: under anaerobic condition, controlling humidity at 50% and temperature at 35 deg.C, fermenting for 7 days;
the fourth step: and (4) granulating the fertilizer fermented for 7 days in a granulator, and drying to obtain the fertilizer.
The pH of the fertilizer obtained in this example was 6.5, the water content was 35%, and the organic matter content was 40.7%.
Example 3
The embodiment provides a method for preparing a fertilizer by fermenting river sludge and waste garden biomass, which comprises the following steps:
the first step is as follows: collecting waste garden biomass, and uniformly crushing the waste garden biomass by using a crusher;
the second step is that: uniformly mixing 60 parts of river sludge, 30 parts of waste garden biomass and 8 parts of lignite humic acid by weight, and adding 4 parts of microbial agent; the microbial agent comprises 85 parts by weight of microbial agent (namely dividing the 4 parts by weight of microbial agent into 85 parts by weight), 13 parts of bacillus subtilis, 6 parts of bacillus licheniformis, 16 parts of bacillus megaterium, 10 parts of bacillus laterosporus, 8 parts of bacillus mucilaginosus, 12 parts of photosynthetic bacteria, 5 parts of actinomycetes, 8 parts of azotobacter and 7 parts of nitrobacteria.
The third step: under anaerobic condition, controlling humidity at 40% and temperature at average 30 deg.C, and fermenting for 7 days;
the fourth step: and (4) granulating the fertilizer fermented for 7 days in a granulator, and drying to obtain the fertilizer.
The pH of the fertilizer obtained in this example was 7.0, the water content was 30%, and the organic matter content was 30.5%.
Example 4
The embodiment provides a method for preparing a fertilizer by fermenting river sludge and waste garden biomass, which comprises the following steps:
the first step is as follows: collecting waste garden biomass, and uniformly crushing the waste garden biomass by using a crusher;
the second step is that: uniformly mixing 40 parts by weight of river sludge, 10 parts by weight of waste garden biomass and 1 part by weight of lignite humic acid, and adding 1 part by weight of microbial agent; wherein the microbial agent is the same as the microbial agent in example 1;
the third step: under anaerobic condition, controlling humidity at 40% and temperature at 35 deg.C, fermenting for 7 days;
the fourth step: and (4) granulating the fertilizer fermented for 7 days in a granulator, and drying to obtain the fertilizer.
The pH of the fertilizer obtained in this example was 7.5, the water content was 20%, and the organic matter content was 10.1%.
Example 5
The embodiment provides a method for preparing a fertilizer by fermenting river sludge and waste garden biomass, which comprises the following steps:
the first step is as follows: collecting waste garden biomass, and uniformly crushing the waste garden biomass by using a crusher;
the second step is that: uniformly mixing raw materials comprising 80 parts by weight of river sludge, 50 parts by weight of waste garden biomass and 10 parts by weight of lignite humic acid, and adding 10 parts by weight of microbial agent; wherein the microbial agent is the same as the microbial agent in example 1;
the third step: under anaerobic condition, controlling humidity at 50% and temperature at 25 deg.C, fermenting for 7 days;
the fourth step: and (4) granulating the fertilizer fermented for 7 days in a granulator, and drying to obtain the fertilizer.
The pH of the fertilizer obtained in this example was 6.5, the water content was 28%, and the organic matter content was 13.3%.
Example 6
The embodiment provides a method for preparing a fertilizer by fermenting river sludge and waste garden biomass, which comprises the following steps:
the first step is as follows: collecting waste garden biomass, and uniformly crushing the waste garden biomass by using a crusher;
the second step is that: uniformly mixing 70 parts of river sludge, 20 parts of waste garden biomass and 5 parts of lignite humic acid by weight, and adding 3 parts of microbial agent; wherein the microbial agent consists of bacillus subtilis, bacillus licheniformis, bacillus megaterium, bacillus laterosporus, colloidal spore bacteria, photosynthetic bacteria, actinomycetes, azotobacter and nitrobacteria, and the weight of the microbial agent is 65 parts (namely, the 3 parts by weight of the microbial agent are divided into 65 small parts by weight): 15 parts of bacillus subtilis, 7 parts of bacillus licheniformis, 15 parts of bacillus megaterium, 8 parts of bacillus laterosporus, 10 parts of colloidal spore bacteria, 10 parts of photosynthetic bacteria, 5 parts of actinomycetes, 10 parts of azotobacter and 5 parts of nitrobacteria.
The third step: under anaerobic condition, controlling humidity at 50% and temperature at 25 deg.C, fermenting for 7 days;
the fourth step: and (4) granulating the fertilizer fermented for 7 days in a granulator, and drying to obtain the fertilizer.
The pH of the fertilizer obtained in this example was 7.0, the water content was 20%, and the organic matter content was 10.4%.
Comparative example 1
The comparative example provides a method for preparing a fertilizer by fermenting river sludge and waste garden biomass, which comprises the following steps:
the first step is as follows: collecting waste garden biomass, and uniformly crushing the waste garden biomass by using a crusher;
the second step is that: uniformly mixing 60 parts of river sludge, 20 parts of waste garden biomass and 10 parts of lignite humic acid by weight, and adding 5 parts of microbial agent;
the third step: under anaerobic condition, controlling humidity at 40% and temperature at 20 deg.C, and fermenting for 7 days;
the fourth step: and (4) granulating the fertilizer fermented for 7 days in a granulator, and drying to obtain the fertilizer.
The fertilizer obtained in the comparative example has the pH of 7.0, the water content of 30 percent, the organic matter content of 9.1 percent and the fermentation temperature which is too low.
Finally, the method of the present invention is only a preferred embodiment and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A method for preparing a fertilizer by fermenting river sludge and waste garden biomass is characterized by comprising the following steps:
uniformly mixing the river sludge, the waste garden biomass and the humic acid, adding a microbial agent, fermenting for 7 days under an anaerobic condition at the temperature of 25-50 ℃ and the humidity of 30-70%, and granulating and drying to obtain the biological fertilizer.
2. The method according to claim 1, wherein the humidity is controlled to be 40-60% and the temperature is controlled to be 25-40 ℃.
3. The method according to claim 1 or 2, wherein the river sludge has a water content of 30 to 40wt% and a pH of 6.5 to 7.
4. The method according to any one of claims 1 to 3, wherein the organic matter content of the waste landscape biomass is 40-60%; the waste garden biomass bales comprise a mixture of deciduous leaves and/or branches of trees and shrubs; the arbor includes but is not limited to one or more of pine needle, phoenix tree, poplar, goldenrain tree, elm, locust tree and willow; the shrubs include gleditschia horrida and/or euonymus.
5. The method according to any one of claims 1 to 4, wherein the humic acid is lignite humic acid, and the lignite humic acid which is activated and separated and extracted from lignite contains 70% of organic matter.
6. The method of any one of claims 1 to 5, wherein the microbial agent comprises: bacillus subtilis, bacillus licheniformis, bacillus megaterium, bacillus laterosporus, bacillus mucilaginosus, photosynthetic bacteria, actinomycetes, azotobacter and nitrobacteria.
7. The method as claimed in claim 6, wherein the microbial inoculum comprises 13 ~ 15 parts by weight of Bacillus subtilis, 6 ~ 7 parts by weight of Bacillus licheniformis, 15 ~ 16 parts by weight of Bacillus megaterium, 8 ~ 10 parts by weight of Bacillus laterosporus, 8 ~ 10 parts by weight of Bacillus mucilaginosus, 10 ~ 12 parts by weight of photosynthetic bacteria, 3 ~ 5 parts by weight of actinomycetes, 8 ~ 10 parts by weight of azotobacter and 5 ~ 7 parts by weight of nitrobacteria, and the total weight of the microbial inoculum is 100 parts by weight and ~ 105 parts by weight.
8. The method according to any one of claims 1 to 7, wherein raw materials of 40 ~ 80 parts of river sludge, 10 ~ 50 parts of waste garden biomass, 1 ~ 10 parts of humic acid are uniformly mixed in parts by weight, and 1 ~ 8 parts of microbial agent is added.
9. The method according to any one of claims 1 to 8, wherein raw materials of 50 ~ 70 parts of river sludge, 20 ~ 40 parts of waste garden biomass, 5 ~ 10 parts of humic acid are uniformly mixed in parts by weight, and 3 ~ 5 parts of microbial agent is added.
10. A fertilizer produced by the method of any one of claims 1 to 9.
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