CN112573951A - Method for preparing bio-organic fertilizer by mixing sludge and straw - Google Patents
Method for preparing bio-organic fertilizer by mixing sludge and straw Download PDFInfo
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- C05F7/00—Fertilisers from waste water, sewage sludge, sea slime, ooze or similar masses
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- C05F17/00—Preparation of fertilisers characterised by biological or biochemical treatment steps, e.g. composting or fermentation
- C05F17/20—Preparation of fertilisers characterised by biological or biochemical treatment steps, e.g. composting or fermentation using specific microorganisms or substances, e.g. enzymes, for activating or stimulating the treatment
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- C05F17/70—Controlling the treatment in response to process parameters
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- C05F17/00—Preparation of fertilisers characterised by biological or biochemical treatment steps, e.g. composting or fermentation
- C05F17/80—Separation, elimination or disposal of harmful substances during the treatment
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- 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
- C05G5/00—Fertilisers characterised by their form
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Abstract
The invention discloses a method for preparing a biological organic fertilizer by mixing sludge and straws, wherein the biological organic fertilizer is mainly prepared by taking a composite microbial inoculum, straws and sludge as raw materials, and the raw materials comprise the following components in parts by weight: 0.1-5 parts of composite microbial inoculum, 10-40 parts of straw and 55-89.9 parts of sludge. The organic fertilizer prepared by the invention can change waste into valuable, not only solves the problem of environmental pollution caused by sludge and straws, but also meets the requirements of organic agricultural products on the organic fertilizer. In addition, the bio-organic fertilizer disclosed by the invention not only achieves harmless standards and agricultural standards in all indexes, but also can meet the quality requirements of organic fertilizer products in quality; meanwhile, the organic fertilizer is applied, so that the nutritional quality of the tomatoes can be improved, and the yield of the tomatoes can be increased to different degrees.
Description
Technical Field
The invention relates to the technical field of solving agricultural pollution and sludge treatment, in particular to a method for preparing a bio-organic fertilizer by mixing sludge and straws.
Background
The crop straw resources in China are rich and are byproducts generated in agricultural production. The straws contain a large amount of carbohydrates and mineral nutrients, and the straws are rich in nutrients such as nitrogen, phosphorus, potassium and the like, and are high-quality fertilizers required by crops.
The natural stacking and retting of the straws to the field or direct field returning are important ways for effectively utilizing the straws, but the straw decomposition speed is low, and diseases and insect pests are easily caused, so the straw returning field is not widely applied to agriculture. If a large amount of straws are directly burned, stacked or abandoned, not only is the resource waste greatly caused, but also the environment is seriously polluted. With the change of life style of people and the strict enforcement of policies of forbidding incineration and preventing pollution, a great deal of straws have become a great problem in the agricultural field.
With the development of urbanization and the popularization of aquatic breeding industry in China, domestic sludge, breeding sludge, chemical sludge and the like are greatly increased. It is known that the sludge usually contains a large amount of toxic and harmful substances, such as parasitic ova, pathogenic microorganisms, bacteria, synthetic organic matters, heavy metal ions and the like, but at the same time, the sludge also contains nitrogen, phosphorus and potassium required by plant growth and development, a plurality of trace elements for maintaining the normal growth and development of plants and organic matters capable of improving the soil structure. If the sludge is not properly treated, not only can the ecological environment be polluted to different degrees, but also great waste can be caused.
The Chinese invention patent application 201210119634.X proposes a concept of producing a bio-organic fertilizer by using sludge and straws. But the technical scheme is general, simple and rough, and the effect can not be achieved. In fact, toxic substances in various sludge can be decomposed by specific microorganisms, so that waste is changed into valuable.
Disclosure of Invention
In order to solve the defects in the prior art, the invention aims to provide a method for preparing a bio-organic fertilizer by mixing sludge and crop straws, which adopts the sludge and the crop straws as raw materials, and can solve the pollution treatment problem of the sludge and the manufacturing of the organic fertilizer; meanwhile, the straws are decomposed by adding the composite microbial inoculum and returned to the field, so that a large amount of straws can be treated, the decomposition of the straws can be accelerated, the fertilizer efficiency is improved, the soil is improved, and the soil fertility is improved.
The invention adopts the following technical scheme:
a method for preparing a biological organic fertilizer by mixing sludge and straws is disclosed, wherein the organic fertilizer is prepared from the following raw materials in parts by weight:
0.1-5 parts of the compound microbial inoculum;
10-40 parts of straw;
55-89.9 parts of sludge.
Preferably, the preparation method of the bio-organic fertilizer at least comprises the following steps:
step S100: preparing a complex microbial inoculum;
step S200: crushing straws: cutting the straws into 0.5-2 cm by one or more of a sawing method, a smashing method, a crushing method and a grinding method;
step S300: taking fresh sludge, and controlling the water content of the fresh sludge to be 50-75%;
step S400: adding dry sawdust in an amount of 16-30% of the weight of the sludge in the step S300, uniformly stirring, stacking for 4-10 days at a stacking temperature of 50-70 ℃ to obtain mixed sludge;
step S500: and (2) mixing the composite microbial inoculum obtained in the step S100, the crushed straws obtained in the step S200 and the mixed sludge obtained in the step S400 in a weight ratio of 0.1-5: 10-40: 55-89.9, stacking and fermenting for 100-150 days at 40-60 ℃ to obtain a base fertilizer;
step S600: and (3) drying part of the sludge in the step (S300) until the water content is not more than 15%, mixing the dried sludge with the base fertilizer treated in the step (S500) until the water content of the mixture is not more than 35%, uniformly mixing the mixture by a stirrer to prepare a bio-organic fertilizer powder product, bagging the bio-organic fertilizer powder product, or pouring the bio-organic fertilizer powder product into a granulator for granulation, drying the granules after the granulation is finished, and bagging the granules.
Preferably, the complex microbial inoculum comprises one or a mixture of more of aspergillus glaucus, albuterococcus, polyporus pinus, trichoderma harzianum, verticillium chlamydosporium, lactobacillus plantarum, saccharomyces cerevisiae and bacillus subtilis.
Preferably, the straw is one or a mixture of several of soybean, corn, rape, rice, wheat and potato vine straw.
Preferably, the sludge at least comprises one or a mixture of several of biochemical sludge, domestic sewage sludge, industrial wastewater sludge and water supply sludge generated in the process of preparing gelatin by processing and grinding bones or shellfish.
Preferably, a deodorant is further added into the base fertilizer, the deodorant comprises one or a mixture of several of microbial complexing agents prepared from lactobacillus acidophilus, white rot fungi and thermal amylase streptomyces, and the addition amount of the microbial deodorizing agent is 0.05-0.15% of the total weight of the raw materials.
Preferably, the organic fertilizer is prepared from the following raw materials in parts by weight: 0.1 part of composite microbial inoculum, 10 parts of straw and 55 parts of sludge.
Preferably, the organic fertilizer is prepared from the following raw materials in parts by weight: 1 part of composite microbial inoculum, 20 parts of straw and 65 parts of sludge.
Preferably, the organic fertilizer is prepared from the following raw materials in parts by weight: 3 parts of composite microbial inoculum, 30 parts of straw and 75 parts of sludge.
Preferably, the organic fertilizer is prepared from the following raw materials in parts by weight: 5 parts of composite microbial inoculum, 40 parts of straw and 89.9 parts of sludge.
Compared with the prior art, the invention has the beneficial effects that:
1. a method for preparing a bio-organic fertilizer by mixing sludge with straws adopts sludge of factories, ponds, river bottoms, sewage treatment plants and the like as raw materials, can solve the problem of sludge pollution treatment and can obtain an organic fertilizer with better fertility.
2. A method for preparing a bio-organic fertilizer by mixing sludge and straws is characterized in that a composite microbial inoculum is added for decomposition treatment and then returning to the field, so that a large amount of straws can be treated, the decomposition of the straws is accelerated, the fertilizer efficiency can be improved, and the soil fertility can be improved, and the method is an effective way for solving the current organic fertilizer shortage in China.
Detailed Description
The invention is further illustrated and described by the following specific examples, which do not limit the scope of the invention in any way.
Example 1
A method for preparing a bio-organic fertilizer by mixing sludge and straws comprises the following raw materials in parts by weight: wherein, the composite microbial inoculum comprises 0.1 part of composite microbial inoculum, 10 parts of straws and 55 parts of sludge, wherein the composite microbial inoculum comprises one or a mixture of more of aspergillus glaucus, verticillium flavum, stenotrophospora rosea, trichoderma harzianum, verticillium chlamydosporium, lactobacillus plantarum, saccharomyces cerevisiae and bacillus subtilis; the straw is one or a mixture of several of soybean, corn, rape, rice, wheat and potato vine; the sludge at least comprises one or a mixture of more of biochemical sludge, domestic sewage sludge, industrial wastewater sludge and water supply sludge generated in the process of preparing gelatin by processing and grinding bones or shellfish. A deodorant can also be added in the manufacturing process of the organic fertilizer, the deodorant comprises one or a mixture of a plurality of microbial complexing agents made of lactobacillus acidophilus, white rot fungi and thermal amylase streptomyces, and the adding amount of the microbial deodorizing agent is 0.1 percent of the total weight of the raw materials.
The method for preparing the bio-organic fertilizer by mixing the sludge and the straws at least comprises the following steps:
firstly, preparing the composite microbial inoculum for later use, and then crushing straws, namely cutting the straws into 0.5 cm by one or more of a sawing method, a smashing method, a crushing method and a grinding method; then, taking one or a mixture of more of biochemical sludge, domestic sewage sludge, industrial wastewater sludge and water supply sludge, and controlling the water content of the sludge by 50%; adding dry sawdust into the sludge, wherein the adding amount of the dry sawdust is 20% of the weight of the sludge, uniformly stirring the dry sawdust and the sludge, stacking for 7 days at a stacking temperature of 60 ℃ to obtain mixed sludge; then, mixing the prepared composite microbial inoculum, the crushed straws and the mixed sludge according to the weight ratio of 0.1: 10: 55, stacking and fermenting for 100 days at 50 ℃ to obtain a base fertilizer; and finally, drying part of the sludge in the sun, mixing the dried part of the sludge with the base fertilizer obtained in many times until the water content of the mixture is not more than 35%, uniformly mixing the mixture by using a stirrer to prepare a bio-organic fertilizer powder product, bagging the bio-organic fertilizer powder product, or pouring the bio-organic fertilizer powder product into a granulator for granulation to prepare a bio-organic fertilizer granulated product, drying the granulated particles in the sun, and bagging the granules.
Example 2
A method for preparing a bio-organic fertilizer by mixing sludge and straws comprises the following raw materials in parts by weight: the composite microbial inoculum comprises 1 part of composite microbial inoculum, 20 parts of straws and 65 parts of sludge, wherein the composite microbial inoculum comprises one or a mixture of more of aspergillus glaucescens, verticillium flavum, stenotrophospora rosea, trichoderma harzianum, verticillium chlamydosporium, lactobacillus plantarum, saccharomyces cerevisiae and bacillus subtilis; the straw is one or a mixture of more of soybean, corn, rape, rice, wheat and potato vine straw; the sludge at least comprises one or a mixture of more of biochemical sludge, domestic sewage sludge, industrial wastewater sludge and water supply sludge generated in the process of preparing gelatin by processing and grinding bones or shellfish. A deodorant can also be added in the manufacturing process of the organic fertilizer, the deodorant comprises one or a mixture of a plurality of microbial complexing agents made of lactobacillus acidophilus, white rot fungi and thermal amylase streptomyces, and the adding amount of the microbial deodorizing agent is 0.08 percent of the total weight of the raw materials.
The method for preparing the bio-organic fertilizer by mixing the sludge and the straws at least comprises the following steps:
firstly, preparing the composite microbial inoculum for later use, and then crushing straws, namely cutting the straws into 0.5 cm by one or more of a sawing method, a smashing method, a crushing method and a grinding method; then, taking one or a mixture of more of biochemical sludge, domestic sewage sludge, industrial wastewater sludge and water supply sludge, and controlling the water content of the sludge by 50%; adding dry sawdust into the sludge, wherein the adding amount of the dry sawdust is 20% of the weight of the sludge, uniformly stirring the dry sawdust and the sludge, stacking for 7 days at a stacking temperature of 60 ℃ to obtain mixed sludge; then, mixing the prepared composite microbial inoculum, the crushed straw and the mixed sludge according to the weight ratio of 1: 20: 65, then stacking and fermenting for 100 days at the fermentation temperature of 50 ℃ to obtain a base fertilizer; and finally, drying part of the sludge in the sun, mixing the dried part of the sludge with the base fertilizer obtained in many ways until the water content of the mixture is not more than 35%, uniformly mixing the mixture by using a stirrer to prepare a bio-organic fertilizer powder product, bagging the bio-organic fertilizer powder product, or pouring the bio-organic fertilizer powder product into a granulator for granulation to prepare a bio-organic fertilizer granulation product, drying the granulated particles in the sun, and bagging the granules.
Example 3
A method for preparing a bio-organic fertilizer by mixing sludge and straws comprises the following raw materials in parts by weight: 3 parts of composite microbial inoculum, 30 parts of straw and 75 parts of sludge, wherein the composite microbial inoculum comprises one or a mixture of more of aspergillus glaucescens, verticillium flavum, stenotrophospora rosea, trichoderma harzianum, verticillium chlamydosporium, lactobacillus plantarum, saccharomyces cerevisiae and bacillus subtilis; the straw is one or a mixture of more of soybean, corn, rape, rice, wheat and potato vine straw; the sludge at least comprises one or a mixture of more of biochemical sludge, domestic sewage sludge, industrial wastewater sludge and water supply sludge generated in the process of preparing gelatin by processing and grinding bones or shellfish. A deodorant can also be added in the manufacturing process of the organic fertilizer, the deodorant comprises one or a mixture of a plurality of microbial complexing agents made of lactobacillus acidophilus, white rot fungi and thermal amylase streptomyces, and the adding amount of the microbial deodorizing agent is 0.05 percent of the total weight of the raw materials.
The method for preparing the bio-organic fertilizer by mixing the sludge and the straws at least comprises the following steps:
firstly, preparing the composite microbial inoculum for later use, and then crushing straws, namely cutting the straws into 0.5 cm by one or more of a sawing method, a smashing method, a crushing method and a grinding method; then, taking one or a mixture of more of biochemical sludge, domestic sewage sludge, industrial wastewater sludge and water supply sludge, and controlling the water content of the sludge by 50%; adding dry sawdust into the sludge, wherein the adding amount of the dry sawdust is 20% of the weight of the sludge, uniformly stirring the dry sawdust and the sludge, stacking for 7 days at a stacking temperature of 60 ℃ to obtain mixed sludge; then, mixing the prepared composite microbial inoculum, the crushed straws and the mixed sludge according to the weight part ratio of 3: 30: 75 (namely 1: 10:25), then stacking and fermenting for 100 days at the fermentation temperature of 50 ℃ to obtain a base fertilizer; and finally, drying part of the sludge in the sun, mixing the dried part of the sludge with the base fertilizer obtained in many ways until the water content of the mixture is not more than 35%, uniformly mixing the mixture by using a stirrer to prepare a bio-organic fertilizer powder product, bagging the bio-organic fertilizer powder product, or pouring the bio-organic fertilizer powder product into a granulator for granulation to prepare a bio-organic fertilizer granulated product, drying the granulated particles in the sun, and bagging the granules.
Example 4
A method for preparing a bio-organic fertilizer by mixing sludge and straws comprises the following raw materials in parts by weight: 5 parts of composite microbial inoculum, 40 parts of straw and 89.9 parts of sludge, wherein the composite microbial inoculum comprises one or a mixture of more of aspergillus glaucus, verticillium flavum, stenotrophosporium roseum, trichoderma harzianum, verticillium chlamydosporium, lactobacillus plantarum, saccharomyces cerevisiae and bacillus subtilis; the straw is one or a mixture of several of soybean, corn, rape, rice, wheat and potato vine; the sludge at least comprises one or a mixture of more of biochemical sludge, domestic sewage sludge, industrial wastewater sludge and water supply sludge generated in the process of preparing gelatin by processing and grinding bones or shellfish. A deodorant can also be added in the manufacturing process of the organic fertilizer, the deodorant comprises one or a mixture of a plurality of microbial complexing agents made of lactobacillus acidophilus, white rot fungi and thermal amylase streptomyces, and the adding amount of the microbial deodorizing agent is 0.15 percent of the total weight of the raw materials.
The method for preparing the bio-organic fertilizer by mixing the sludge and the straws at least comprises the following steps:
firstly, preparing the composite microbial inoculum for later use, and then crushing straws, namely cutting the straws into 0.5 cm by one or more of a sawing method, a smashing method, a crushing method and a grinding method; then, taking one or a mixture of more of biochemical sludge, domestic sewage sludge, industrial wastewater sludge and water supply sludge, and controlling the water content of the sludge by 50%; adding dry sawdust into the sludge, wherein the adding amount of the dry sawdust is 20% of the weight of the sludge, uniformly stirring the dry sawdust and the sludge, stacking for 7 days at a stacking temperature of 60 ℃ to obtain mixed sludge; then, mixing the prepared composite microbial inoculum, the crushed straws and the mixed sludge according to the weight part ratio of 5: 40: 89.9, and then stacking and fermenting for 100 days at 50 ℃ to obtain a base fertilizer; and finally, drying part of the sludge in the sun, mixing the dried part of the sludge with the base fertilizer obtained in many times until the water content of the mixture is not more than 35%, uniformly mixing the mixture by using a stirrer to prepare a bio-organic fertilizer powder product, bagging the bio-organic fertilizer powder product, or pouring the bio-organic fertilizer powder product into a granulator for granulation to prepare a bio-organic fertilizer granulated product, drying the granulated particles in the sun, and bagging the granules.
The present applicant has described and illustrated embodiments of the present invention in detail, but it should be understood by those skilled in the art that the above embodiments are merely preferred embodiments of the present invention, and the detailed description is only for the purpose of helping the reader to better understand the spirit of the present invention, and not for the purpose of limiting the scope of the present invention, but rather that any improvement or modification made based on the spirit of the present invention should fall within the scope of the present invention.
The first test example: and (3) carrying out quality detection on the bio-organic fertilizer prepared from the sludge mixed straw according to the national GB8172-87 standard.
In 2015, the inventor carries out related quality detection on the bio-organic fertilizer prepared by using sludge mixed straws, and mainly detects the content of organic matters, the total nutrient content, the content of water, the pH value, the number of faecal escherichia coli groups, the ascarid mortality, the content of heavy metals and the content of some essential elements for biological growth in the bio-organic fertilizer according to the regulation of GB8172-87 fecal harmless hygienic standard, and the detection result (shown in Table 1) shows that all indexes of the bio-organic fertilizer reach the harmless standard and the agricultural standard, and the quality of the bio-organic fertilizer meets the quality requirement of organic fertilizer products and can be put into use.
TABLE 1 quality testing table for bio-organic fertilizer
Test example two: the influence of applying the bio-organic fertilizer on the quality and the yield of the tomato fruits.
Selecting the same field, and designing 6 groups of experiments comprising 5 test groups and 1 control group, wherein each group of experiments is designed with 3 test cells each with an area of 30m2All test cells are randomly distributed.
Test group 1: the fertilizer applied in test group 1 was an organic fertilizer prepared according to the ratio of the complex microbial inoculum, straw and sludge described in example 1. The specific fertilization mode is that the biological organic fertilizer described in the example 1 is applied according to the amount of 200 kg per mu of land, and the organic fertilizer is applied in the planting period, the strong seedling period and the fruiting period of the tomatoes, wherein the additional fertilization amount is 50 kg per mu of land.
Test group 2: the fertilizer applied in test group 2 was an organic fertilizer prepared according to the ratio of the complex microbial inoculum, straw and sludge described in example 2. The specific fertilization mode is that the biological organic fertilizer described in the example 2 is applied according to the amount of 200 kg per mu of land, and the organic fertilizer is applied in the planting period, the strong seedling period and the fruiting period of the tomatoes, wherein the additional fertilization amount is 50 kg per mu of land.
Test group 3: the fertilizer applied in test group 3 was an organic fertilizer prepared according to the ratio of the complex microbial inoculum, straw and sludge described in example 3. The specific fertilization mode is that the biological organic fertilizer in the example 3 is applied according to the amount of 200 kg per mu of land, and the organic fertilizer is applied in the planting period, the strong seedling period and the fruiting period of the tomatoes, wherein the additional fertilization amount is 50 kg per mu of land.
Test group 4: the fertilizer applied in test group 4 was an organic fertilizer prepared according to the ratio of the complex microbial inoculum, straw and sludge described in example 4. The specific fertilization mode is that the biological organic fertilizer described in the example 4 is applied according to the amount of 200 kg per mu of land, and the organic fertilizer is applied in the planting period, the strong seedling period and the fruiting period of the tomatoes, wherein the additional fertilization amount is 50 kg per mu of land.
Test group 5: the fertilizers applied in test group 5 were inorganic fertilizers. The specific fertilization mode is that the inorganic fertilizer is applied according to the amount of 200 kg applied to each mu of land, and the inorganic fertilizer is applied in a topdressing manner in the planting period, the strong seedling period and the fruiting period of the tomatoes, wherein the topdressing amount is 50 kg applied to each mu of land.
The control group (CK) is not fertilized in the whole growth stage of the tomato, such as the sowing period, the planting period, the strong seedling period, the fruiting period and the like.
Selecting "Yuanyuan No. 8" tomatoes as test varieties for 5 test groups and a control group, and selecting 130g/667m in 3 Yuehu ten days2And (4) carrying out direct seeding planting, wherein the same conventional management is adopted for other management except the fertilizing amount in each district, and fruits are picked and harvested in the last 8 th month. After the tomatoes are harvested, the yield of each cell is counted, the average cell yield of each group is calculated, the quality of the tomatoes harvested in each cell is identified, and specific results are shown in table 2.
TABLE 2 Effect of different fertilisation treatments on tomato quality and yield
Test results show that after different fertilizers are applied, the reducing Vc content, the total soluble sugar content, the soluble solid content, the average single fruit weight and the average area yield in tomato fruits are all as follows: example 4> example 5> example 3> example 2> example 1> control; the titratable acidity is: control > example 1> example 3> example 5> example 4, which shows that the reduced Vc content, total soluble sugar content, soluble solids, average individual fruit weight and average district yield in tomato fruits are higher than those in the control, whether organic or inorganic fertilizer is applied, but if the fertilizer is used excessively, the nutrient content of the tomato is reduced, the quality of the tomato is affected, namely, the excessive fertilizer is not beneficial to improving the comprehensive nutrient quality of the tomato.
The experiment also further shows that compared with a control group, the application of the organic fertilizer can not only improve the quality of the tomatoes, but also increase the yield of the tomatoes to different degrees; compared with the application of inorganic fertilizer, the application of the organic fertilizer can not only provide green and pollution-free products, but also better improve the nutritional quality and the yield of the tomatoes.
Claims (10)
1. The method for preparing the bio-organic fertilizer by mixing the sludge and the straws is characterized in that the organic fertilizer is prepared from the following raw materials in parts by weight:
0.1-5 parts of the compound microbial inoculum;
10-40 parts of straw;
55-89.9 parts of sludge.
2. The method for preparing the bio-organic fertilizer according to claim 1, wherein the method for preparing the bio-organic fertilizer at least comprises the following steps:
step S100: preparing a complex microbial inoculum;
step S200: crushing straws: cutting the straws into 0.5-2 cm by one or more of a sawing method, a smashing method, a crushing method and a grinding method;
step S300: taking fresh sludge, and controlling the water content of the fresh sludge to be 50-75%;
step S400: adding dry sawdust in an amount of 16-30% of the weight of the sludge in the step S300, uniformly stirring, stacking for 4-10 days at a stacking temperature of 50-70 ℃ to obtain mixed sludge;
step S500: and (2) mixing the composite microbial inoculum obtained in the step S100, the crushed straws obtained in the step S200 and the mixed sludge obtained in the step S400 in a weight ratio of 0.1-5: 10-40: 55-89.9, stacking and fermenting for 100-150 days at 40-60 ℃ to obtain a base fertilizer;
step S600: and (3) drying part of the sludge in the step (S300) until the water content is not more than 15%, mixing the dried part of the sludge with the base fertilizer treated in the step (S500) until the water content of the mixture is not more than 35%, uniformly mixing the mixture by a stirrer to prepare a bio-organic fertilizer powder product, bagging the bio-organic fertilizer powder product, or pouring the bio-organic fertilizer powder product into a granulator for granulation, drying the granules after the granulation is finished, and bagging the granules.
3. The method for preparing the biological organic fertilizer as claimed in claim 1, wherein the complex microbial inoculum comprises one or more of aspergillus glaucus, albedonia, polyporus pinus, trichoderma harzianum, verticillium chlamydosporium, lactobacillus plantarum, saccharomyces cerevisiae and bacillus subtilis.
4. The method for preparing the bio-organic fertilizer as claimed in claim 1, wherein the straw is one or a mixture of several of soybean, corn, rape, rice, wheat and potato vine straw.
5. The method for preparing the bio-organic fertilizer according to claim 1, wherein the sludge at least comprises one or more of biochemical sludge, domestic sewage sludge, industrial wastewater sludge and water supply sludge generated in the process of preparing gelatin by processing and grinding bones or shellfish.
6. The method for preparing the bio-organic fertilizer as claimed in claim 2, wherein a deodorant is further added into the base fertilizer, and the deodorant comprises one or a mixture of several of microbial complexing agents made from lactobacillus acidophilus, white rot fungi and thermal amylase streptomyces.
7. The method for preparing the bio-organic fertilizer as claimed in claim 6, wherein the addition amount of the microbial deodorizing agent is 0.05-0.15% of the total weight of the raw materials.
8. The method for preparing the bio-organic fertilizer according to claim 1, wherein the organic fertilizer is prepared from the following raw materials in parts by weight: 0.1 part of composite microbial inoculum, 10 parts of straw and 55 parts of sludge.
9. The method for preparing the bio-organic fertilizer according to claim 1, wherein the organic fertilizer is prepared from the following raw materials in parts by weight: 3 parts of composite microbial inoculum, 30 parts of straw and 75 parts of sludge.
10. The method for preparing the bio-organic fertilizer according to claim 1, wherein the organic fertilizer is prepared from the following raw materials in parts by weight: 5 parts of composite microbial inoculum, 40 parts of straw and 89.9 parts of sludge.
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