CN117362083B - Nitrogen-retaining and corrosion-promoting method for agricultural organic solid waste aerobic compost - Google Patents
Nitrogen-retaining and corrosion-promoting method for agricultural organic solid waste aerobic compost Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 29
- 239000002910 solid waste Substances 0.000 title claims abstract description 16
- 239000002361 compost Substances 0.000 title claims abstract description 15
- 239000002689 soil Substances 0.000 claims abstract description 174
- 238000009264 composting Methods 0.000 claims abstract description 65
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 46
- 239000010902 straw Substances 0.000 claims abstract description 32
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 23
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 22
- 239000011707 mineral Substances 0.000 claims abstract description 22
- 239000003864 humus Substances 0.000 claims abstract description 19
- 238000000855 fermentation Methods 0.000 claims abstract description 13
- 230000004151 fermentation Effects 0.000 claims abstract description 13
- 239000003895 organic fertilizer Substances 0.000 claims abstract description 13
- 230000000694 effects Effects 0.000 claims abstract description 4
- 241000209140 Triticum Species 0.000 claims description 27
- 235000021307 Triticum Nutrition 0.000 claims description 27
- 210000003608 fece Anatomy 0.000 claims description 20
- 239000002253 acid Substances 0.000 claims description 19
- 239000002245 particle Substances 0.000 claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 238000002156 mixing Methods 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 6
- CKUAXEQHGKSLHN-UHFFFAOYSA-N [C].[N] Chemical compound [C].[N] CKUAXEQHGKSLHN-UHFFFAOYSA-N 0.000 claims description 4
- 238000005273 aeration Methods 0.000 claims description 3
- 244000005700 microbiome Species 0.000 abstract description 12
- 239000002994 raw material Substances 0.000 abstract description 11
- 238000000354 decomposition reaction Methods 0.000 abstract description 5
- 235000015097 nutrients Nutrition 0.000 abstract description 5
- 238000010521 absorption reaction Methods 0.000 abstract description 4
- 230000008901 benefit Effects 0.000 abstract description 4
- 238000005342 ion exchange Methods 0.000 abstract description 4
- 239000010871 livestock manure Substances 0.000 abstract description 3
- 230000002503 metabolic effect Effects 0.000 abstract description 2
- 230000001737 promoting effect Effects 0.000 abstract description 2
- 229920002488 Hemicellulose Polymers 0.000 description 9
- 229910052799 carbon Inorganic materials 0.000 description 5
- 230000015556 catabolic process Effects 0.000 description 5
- 238000006731 degradation reaction Methods 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 230000001186 cumulative effect Effects 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 238000012271 agricultural production Methods 0.000 description 2
- 238000007605 air drying Methods 0.000 description 2
- CKMXBZGNNVIXHC-UHFFFAOYSA-L ammonium magnesium phosphate hexahydrate Chemical compound [NH4+].O.O.O.O.O.O.[Mg+2].[O-]P([O-])([O-])=O CKMXBZGNNVIXHC-UHFFFAOYSA-L 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 238000003556 assay Methods 0.000 description 2
- 229920002678 cellulose Polymers 0.000 description 2
- 239000001913 cellulose Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000003337 fertilizer Substances 0.000 description 2
- 229920005610 lignin Polymers 0.000 description 2
- 230000000813 microbial effect Effects 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 229910052567 struvite Inorganic materials 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000002154 agricultural waste Substances 0.000 description 1
- 229910000323 aluminium silicate Inorganic materials 0.000 description 1
- 239000006286 aqueous extract Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000029087 digestion Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000001404 mediated effect Effects 0.000 description 1
- 239000010815 organic waste Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000004181 pedogenesis Methods 0.000 description 1
- 239000000575 pesticide Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- FQENQNTWSFEDLI-UHFFFAOYSA-J sodium diphosphate Chemical compound [Na+].[Na+].[Na+].[Na+].[O-]P([O-])(=O)OP([O-])([O-])=O FQENQNTWSFEDLI-UHFFFAOYSA-J 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 235000019818 tetrasodium diphosphate Nutrition 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
- C05F17/10—Addition or removal of substances other than water or air to or from the material during the treatment
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05D—INORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C; FERTILISERS PRODUCING CARBON DIOXIDE
- C05D9/00—Other inorganic fertilisers
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
- C05G3/80—Soil conditioners
-
- 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
Abstract
The invention belongs to the technical field of agricultural solid waste resource utilization, and discloses a nitrogen-retaining and corrosion-promoting method for agricultural organic solid waste aerobic composting. The agricultural organic fertilizer with low nitrogen loss and high decomposition degree is obtained by taking crop straws and livestock manure as raw materials and adding soil containing secondary minerals and controlling fermentation conditions. The addition of the soil has the advantages of improving the ion exchange capacity of the organic fertilizer, improving the microorganism growth environment, promoting the absorption of nutrients by microorganisms, improving the metabolic activity of aerobic composting microorganisms and the like, and solves the problems of poor decomposition degree and poor quality of compost products in the aerobic composting process. The aerobic composting process provided by the invention has the advantages that the total nitrogen content is improved by 3.3% -48.05%, and the N content is improved 2 The release amount of O is reduced by 3.45% -15.73%, the content of humus is increased by 14.4% -25.9%, and the effect is remarkable.
Description
Technical Field
The invention belongs to the technical field of agricultural solid waste resource utilization, and relates to a nitrogen-retaining and corrosion-promoting method for agricultural organic solid waste aerobic composting.
Background
The fertilizer is the most main utilization mode of agricultural organic waste, and the low-carbon treatment and resource utilization of organic solid waste can be realized by converting the agricultural waste into the organic fertilizer. The crop straw and the livestock manure are used as potential raw materials of the organic fertilizer, the resource utilization can be realized through an aerobic composting technology, and the disposal mode can not only reduce environmental pollution, but also perfect the modern agriculture industry chain. The organic fertilizer can provide nutrient elements such as nitrogen, phosphorus, potassium and the like for crops, improve the microbial community of the root system of the crops, promote the yield and income increase of the crops, reduce the dependence on chemical fertilizers and pesticides, and reduce the pollution load of agricultural production to the environment.
Crop straw is used as lignocellulose raw material, and its main components are hemicellulose, cellulose and lignin. The lignin structure tightly wraps cellulose and hemicellulose to form a compact and stable structure, so that the content of composting humus and the composting effectiveness are reduced. At the same time, microorganism-mediated NH 3 Volatilization and N 2 The release of O causes nitrogen loss, limits composting efficiency and reduces composting quality. In order to reduce nitrogen losses and increase the humus content, additives are often used in the composting process. For example, patent CN109020705a discloses a method of combining struvite crystallization with aerobic composting. However, due to the high preparation cost and quality instability of struvite, cost, risk and benefit are comprehensively considered in practical application.
Soil secondary minerals are minerals newly formed by primary minerals during weathering and soil formation, and include various simple salts, secondary oxides and aluminosilicates. The types of secondary minerals in the soil are many, and the types and the amounts of the secondary minerals contained in different types of soil are different. The secondary minerals in the soil account for 90% -97% of the solid part of the soil, and the soil has good adsorptivity and ion exchange capacity, so that a growth environment can be provided for microorganisms, and the absorption of the microorganisms to nutrient substances can be promoted. Therefore, the characteristics of secondary mineral components in different soils are researched, and the secondary mineral components are applied to crop straw composting fermentation treatment, so that the secondary mineral components have practical necessity in agricultural production application.
Disclosure of Invention
In order to further improve the composting effect of the existing composting fermentation technology and solve the problem of the degradation of the composting quality caused by nitrogen loss in the aerobic composting process, the use of the soil containing the secondary mineral components for the composting fermentation is helpful to improve the composting effect. Specifically, the invention adopts the following technical scheme.
The invention provides an agricultural organic solid waste aerobic composting method based on soil characteristics.
Further, in the above method, the soil includes: soil, tidal soil, desert soil, black soil, yellow brown soil and acid purple soil; the agricultural organic solid waste is wheat straw and cow dung.
Further, in the above method, wheat straw: cow dung=4:6 in dry weight ratio.
Further, in the method, one of soil, tidal soil, desert soil, black-soil, yellow brown soil and acid purple soil is selected for aerobic composting; the addition amount of the soil is 10% of the total dry weight of the wheat straw and the cow dung.
Further, in the method, the initial carbon-nitrogen ratio of the aerobic composting reaction system is 25:1-30:1.
Further, in the method, the water content of the aerobic composting reaction system is 55% -65%.
Further, in the above method, the method comprises the steps of:
crushing wheat straw into particles with the particle size of 2-3 cm;
mixing wheat straw and cow dung according to a dry weight mass ratio of 4:6;
adding soil, or damp soil, or desert soil, or black soil, or yellow brown soil, or acid purple soil into the mixture, wherein the addition amount is 10% of the total dry weight of the wheat straw and the cow dung;
adjusting the carbon-nitrogen ratio to be 25:1-30:1, and adjusting the water content to be 55% -65%;
aeration is carried out for 5 minutes per hour, turning is carried out on days 1, 3, 7, 15, 21, 28 and 35 respectively, and composting time is 35 days.
Based on the method disclosed by the invention, the agricultural organic fertilizer can be prepared, and the loss rate of nitrogen in the organic fertilizer is low.
In addition, the invention also claims the application of the method in the utilization of agricultural solid waste resources. The method is used for recycling agricultural solid wastes, can effectively reduce nitrogen loss in the fermentation process of aerobic compost, improves the total nitrogen content of the compost, and increases the humus content of the compost.
Compared with the prior art, the invention has the following beneficial effects:
the invention uses the soil containing the secondary mineral components in the agricultural solid waste aerobic composting to produce the organic fertilizer, and the secondary minerals in the soil contain various salts, so that the organic fertilizer has good adsorptivity and ion exchange capacity, can provide a growing environment for microorganisms, can promote the absorption of the microorganisms to nutrient substances, and can promote the microorganisms to thoroughly decompose the raw materials in the composting fermentation process.
By adopting the technical scheme provided by the invention, the total nitrogen content in the fermentation system can be improved. After composting, the total nitrogen contents of the soil, the desert soil, the acid purple soil, the black-blue soil and the yellow brown soil groups are 19.42mg/g, 18.67mg/g, 17.30mg/g, 17.87mg/g and 20.54mg/g respectively, and the total nitrogen contents are respectively increased by 40.54%, 39.04%, 48.05%,3.3% and 22.9% compared with the initial values.
By adopting the technical scheme provided by the invention, the nitrogen loss in a fermentation system can be reduced. After composting, soil, desert soil, acid purple soil, tide soil, black lu soil and yellow brown soil 2 The daily O discharge amounts were 16.94mg/kg, 16.25mg/kg, 14.20mg/kg, 18.31mg/kg, 17.10mg/kg and 18.57mg/kg, respectively, which were smaller than those of the control group.
By adopting the technical scheme provided by the invention, the humus content in a fermentation system can be improved. After composting, the contents of humus in soil, desert soil, acid purple soil, tidal soil, black-and-blue soil and yellow-brown soil are respectively increased by 19.2%, 25.9%, 18.1%, 24.5%, 24.0% and 14.4%, which are larger than those of a control group. The method is characterized in that the soil containing the secondary minerals is used for aerobic composting to promote composting fermentation and decomposition.
In summary, the agricultural organic fertilizer with less nitrogen loss and high decomposition degree is obtained by taking crop straws and livestock manure as raw materials and adding soil containing secondary minerals and controlling fermentation conditions. The addition of the soil has the advantages of improving the ion exchange capacity of the organic fertilizer, improving the microorganism growth environment, promoting the absorption of microorganisms to nutrient substances, improving the metabolic activity of aerobic composting microorganisms and the like, and solves the problems of poor decomposition degree and poor quality of the composting products in the aerobic composting process, thereby obtaining high-quality composting products. The invention provides a reference path for recycling the agricultural solid waste and has important contribution significance.
Drawings
FIG. 1 is a graph showing the total nitrogen content of different types of soil ( soil, desert soil, acid purple soil).
FIG. 2 is N of different types of soil ( soil, desert soil, acid purple soil) 2 O cumulative release amount change map.
FIG. 3 is a graph showing the change in soluble organic carbon (DOC) content of different types of soil ( soil, desert soil, acid purple soil).
FIG. 4 is a graph showing the variation of humus content in different types of soil ( soil, desert soil, acid purple soil).
FIG. 5 is N of different types of soil (tidal soil, black soil, yellow brown soil) 2 O cumulative emission amount variation map.
FIG. 6 is a graph showing the variation of VS content of different types of soil (tidal soil, black soil, yellow brown soil).
FIG. 7 is a graph showing DOC content change of different types of soil (tidal soil, black soil, yellow brown soil).
FIG. 8 is a graph showing the hemicellulose content change in different types of soil (tidal soil, black soil, yellow brown soil).
FIG. 9 is a graph showing the change of humus content in different types of soil (tidal soil, black soil, yellow brown soil).
Detailed Description
The technical solutions of the present invention will be clearly and completely described in connection with the embodiments, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
The embodiment provides the change condition of various indexes of soil, desert soil and acid purple soil in the process of mixing and aerobic composting of wheat straw and cow dung.
1. Raw material collection and processing
Collecting wheat straw and cow dung as test raw materials (Yang Ling demonstration area of Shanxi province), naturally air-drying the wheat straw until the water content is about 7%, then crushing the wheat straw into particles with the particle size of 2-3 cm, and sealing and preserving the particles for later use. Wheat straw ts=93.8%, vs=80.9%; cow dung ts=15.1%, vs=18.3%. The soil information for the test of this example is shown in Table 1.
TABLE 1 example 1 test soil information
In order to ensure the accuracy of the test, soil is collected in a soil layer with the depth of 15-20 cm, dried at 105 ℃ for 48 hours to reduce potential factor interference, ground and then screened by a 40-mesh sieve for later use.
2. Aerobic composting test
Test setup soil, desert soil, acid purple soil and control groups total 4 test groups, the compost raw material of the control group was not added to the soil.
Uniformly mixing wheat straw and cow dung according to a dry weight ratio of 4:6, controlling the initial C/N to be 30:1, adjusting the water content to 55% -65%, enabling the total mass of the pile to be 16kg, and adding soil with the dry weight of 10% (w/w) of the pile as a conditioner. The laboratory compost is aerated for 5 minutes per hour for 35 days, the compost is turned over on days 1, 3, 7, 15, 21, 28 and 35 respectively, samples are taken when the compost is turned over each time, and the samples are stored at the temperature of minus 80 ℃.
The analysis method comprises the following steps:
the stack and ambient temperature were recorded every morning and afternoon, gas was collected once a day for the first two weeks after the start of the test, and gas was collected once a day for two weeks, and the gas content was analyzed by gas chromatograph. Taking 0.5g of air-dried sample passing through a 40-mesh sieve, adding 10mL of concentrated H 2 SO 4 Digestion was carried out at 200℃and the total nitrogen content was determined using a Kjeldahl apparatus. DOC assay aqueous extracts of fresh samples (1:10 w/v) were assayed using a total organic carbon analyzer according to organic fertilizer industry standard NY/T525-2012. The hemicellulose assay was performed according to Fan Shifa. 0.5g of an air-dried sample passing through a 40-mesh sieve is taken, and a mixture of 0.1mol/L tetrasodium pyrophosphate and 0.1mol/L sodium hydroxide (1:1 v/v) is added, and after shaking at 25 ℃ for 24 hours, humus is extracted at a ratio of 1:10 (w/v).
Test results:
the total nitrogen content variation for different types of soil is shown in figure 1. As shown in fig. 1, the total nitrogen content shows a gradual upward trend. After composting, the total nitrogen contents of the soil, the desert soil and the acid purple soil treatment groups are 19.42mg/g, 18.67mg/g and 17.30mg/g respectively, and the increase ranges are 40.54%, 39.04% and 48.05% respectively compared with the initial values, which are all larger than those of the control group (38.04%).
N of different types of soil 2 The cumulative O emissions change is shown in fig. 2. As shown in FIG. 2, N 2 The release peak of O appears in about day 2-3, and the highest daily release amounts of soil, desert soil and acid purple soil treatment groups are 16.94mg/kg, 16.25mg/kg and 14.20mg/kg respectively, which are smaller than those of the control group (19.34 mg/kg). Then the stack temperature is reduced, the oxygen content is increased, and N 2 The O release is reduced and maintained at a lower level. After composting, soil, desert soil and acid purple soil N 2 The accumulated release amounts of O are 179.33mg/kg, 199.38mg/kg and 174.02mg/kg respectively, which are lower than those of the control group (206.50 mg/kg).
The change in soluble organic carbon (DOC) content for different types of soil is shown in fig. 3. As shown in fig. 3, DOC content of each treatment group was in a decreasing trend. After composting, DOC degradation rates of soil, desert soil and acid purple soil treatment groups are 44.9%, 34.6% and 39.2%, respectively, which are larger than those of a control group (33.5%).
The change in humus content of different types of soil is shown in fig. 4. As shown in fig. 4, the humus content of each treatment group gradually increased as composting progressed. After composting, the humus content of soil, desert soil and acid purple soil treatment groups is respectively increased by 19.2%, 25.9% and 18.1%, which are all larger than that of a control group (14.4%).
The test results show that the addition of the soil containing the secondary minerals can help to relieve the loss of nitrogen and increase the content of humus in the aerobic composting process, and the problems of nitrogen loss and low content of humus in the aerobic composting process are solved.
Example 2
The embodiment provides the change condition of various indexes of the tidal soil, the black soil and the yellow brown soil in the mixed aerobic composting process of the wheat straw and the cow dung.
1. Raw material collection and processing
Collecting wheat straw and cow dung as test raw materials, naturally air-drying the wheat straw to a water content of about 10%, crushing the wheat straw to particles with a particle size of 2-3 cm, and sealing and preserving the particles for later use. Wheat straw ts=93.7%, vs=81.0%; cow dung ts=19.7%, vs=16.0%. The soil information for this example is shown in Table 2.
TABLE 2 test soil information
In order to ensure the accuracy of the test, soil is collected in a soil layer with the depth of 15-20 cm, dried at 105 ℃ for 48 hours to reduce potential factor interference, ground and then screened by a 40-mesh sieve for later use.
2. Aerobic composting test
The test set up tide soil, black lu soil, yellow brown soil and control group total 4 test groups, the compost raw material of the control group is not added into soil.
Uniformly mixing wheat straw and cow dung according to a dry weight ratio of 4:6, controlling the initial C/N to be 30:1, adjusting the water content to 65%, and adding soil with a total mass of 16kg and a dry weight of 10% (W/W) of the pile as a conditioner. And (3) composting in a laboratory for 35 days, aerating for 5 minutes per hour, turning piles on days 1, 3, 7, 15, 21, 28 and 35 respectively, sampling at the upper, middle and lower parts after turning piles each time, and storing the samples at the temperature of-80 ℃. The analytical index and analytical method were the same as in example 1.
Test results:
n of different types of soil 2 The cumulative O emissions change is shown in fig. 5. As shown in fig. 5, N 2 The release peak of O appears in about 1-3 days, and the highest daily release amount of the tidal soil, the black soil and the yellow brown soil treatment group is 18.31mg/kg, 17.10mg/kg and 18.57mg/kg, which are smaller than that of the control group (19.34 mg/kg). Thereafter N 2 The O emissions were always maintained at a low level. After composting, N in tidal soil, black soil and yellow brown soil 2 The accumulated O discharge amounts are 213.86mg/kg, 191.45mg/kg and 192.35mg/kg respectively, which are lower than those of the control group (206.49 mg/kg).
The VS content variation for different types of soil is shown in fig. 6. As shown in fig. 6, the VS content was all in a continuously decreasing trend. After composting, the VS content of the tidal soil and yellow brown soil treated groups was reduced by 8.9% and 9.1%, respectively, and was less than that of the control group (8.8%).
The variation of DOC content of soluble organic carbon for different types of soil is shown in FIG. 7. As shown in fig. 7, DOC content of each treatment group increased rapidly during the high temperature phase, reached a peak at day 3, and then began to decrease until the end of composting. After composting, DOC degradation rates of the tidal soil and black soil and yellow brown soil treatment groups are respectively 30.8%, 29.6% and 32.1%, which are respectively greater than those of the control group (27.2%).
The hemicellulose content changes for different types of soil are shown in fig. 8. As shown in fig. 8, the hemicellulose content of each treatment group tended to decrease. At the high temperature stage of composting, the microbial activity promotes the degradation of hemicellulose, and as composting proceeds, the hemicellulose content decreases. After composting, the hemicellulose content of the wet soil, black soil and yellow brown soil treatment groups is reduced by 11.8%, 13.3% and 11.8%, respectively, which are all greater than that of the control group (7.4%).
The change in humus content of different types of soil is shown in fig. 9. As shown in fig. 9, the addition of tidal soil and black soil treatment group humus content gradually increased as composting progressed. After composting, the humus content of the tidal soil, the black soil and the yellow brown soil treatment groups is respectively increased by 24.5%, 24.0% and 14.4%, which are respectively greater than that of the control group (0.43%). The results show that the addition of the tidal soil, the black soil and the yellow brown soil can promote the degradation of DOC and lignocellulose, improve the composting degree and form more stable humus.
The embodiments described above are only some, but not all, embodiments of the invention. The detailed description of the embodiments of the invention is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments obtained without inventive effort by a person skilled in the art, which are related deductions and substitutions made by the person skilled in the art under the condition of the inventive concept, are within the scope of protection of the present invention.
Claims (3)
1. The application of the soil containing the secondary mineral component in improving the aerobic composting effect of the agricultural organic solid waste is characterized in that the soil containing the secondary mineral component can reduce the nitrogen loss in the fermentation process of the aerobic composting, or improve the total nitrogen content of the composting, or increase the humus content of the composting;
the soil containing the secondary mineral component is selected from any one of soil, black-end soil and acid purple soil;
the agricultural organic solid waste is wheat straw and cow dung;
mixing wheat straw and cow dung according to a dry weight mass ratio of 4:6; adding soil containing secondary mineral components into the mixture of the wheat straw and the cow dung, wherein the addition amount of the soil is 10% of the total dry weight mass of the mixture of the wheat straw and the cow dung;
the initial carbon-nitrogen ratio of the aerobic compost is 25:1-30:1;
the water content of the aerobic compost is 55% -65%;
the wheat straw is crushed into particles with the particle size of 2-3 cm;
aeration is carried out for 5 minutes per hour in the composting process, and turning is carried out on days 1, 3, 7, 15, 21, 28 and 35 respectively, and the composting time is 35 days.
2. The method for nitrogen-retaining and corrosion-promoting of the agricultural organic solid waste aerobic compost is characterized by comprising the following steps of:
crushing wheat straw into particles with the particle size of 2-3 cm;
mixing wheat straw and cow dung according to a dry weight mass ratio of 4:6;
adding soil containing secondary mineral components into the mixture of the wheat straw and the cow dung, wherein the addition amount of the soil is 10% of the total dry weight mass of the mixture of the wheat straw and the cow dung;
the initial carbon-nitrogen ratio is controlled to be 25:1-30:1;
controlling the water content of the aerobic compost to be 55-65%;
composting fermentation, aeration is carried out for 5 minutes per hour, turning is carried out on days 1, 3, 7, 15, 21, 28 and 35 respectively, and the composting time is 35 days;
the soil containing the secondary mineral component is selected from any one of soil, black-cliff soil and acid purple soil.
3. An agricultural organic fertilizer prepared by the method of claim 2.
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| CN202311670034.7A CN117362083B (en) | 2023-12-07 | 2023-12-07 | Nitrogen-retaining and corrosion-promoting method for agricultural organic solid waste aerobic compost |
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Citations (4)
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| KR20070035682A (en) * | 2005-09-28 | 2007-04-02 | 남송희 | Composting method and apparatus for livestock waste |
| CN101580411A (en) * | 2009-06-19 | 2009-11-18 | 镇江市丹徒区江心洲生态农业园区农业综合服务中心 | Method for composting bio-organic fertilizer |
| CN103044097A (en) * | 2012-11-07 | 2013-04-17 | 青岛嘉禾丰肥业有限公司 | Method for preparing organic fertilizer by mixing red earth with straw |
| CN114409485A (en) * | 2022-02-10 | 2022-04-29 | 上海尼普敦环境科技有限公司 | Method for humification of organic matter |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20070035682A (en) * | 2005-09-28 | 2007-04-02 | 남송희 | Composting method and apparatus for livestock waste |
| CN101580411A (en) * | 2009-06-19 | 2009-11-18 | 镇江市丹徒区江心洲生态农业园区农业综合服务中心 | Method for composting bio-organic fertilizer |
| CN103044097A (en) * | 2012-11-07 | 2013-04-17 | 青岛嘉禾丰肥业有限公司 | Method for preparing organic fertilizer by mixing red earth with straw |
| CN114409485A (en) * | 2022-02-10 | 2022-04-29 | 上海尼普敦环境科技有限公司 | Method for humification of organic matter |
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| 两种添加剂对猪粪玉米秸秆堆肥氮素转化和堆肥质量的影响;黄懿梅等;《干旱地区农业研究》;第23卷(第6期);第112-118页 * |
| 徐凤花等.《微生物制品技术及应用》.化学工业出版社,2007,(第1版),第51-69页. * |
| 黏土矿物和化学添加剂对牛粪堆肥过程氮素固持的影响;郜斌斌等;《农业工程学报》;第34卷(第20期);第250-257页 * |
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