Method for improving fertilizer efficiency of organic fertilizer

Abstract

The invention relates to a method for improving the fertilizer efficiency of an organic fertilizer, and belongs to the technical field of organic fertilizer manufacturing, and the specific operation is as follows: firstly, organic fertilizer raw materials are fermented to obtain an organic fertilizer base material, the organic fertilizer raw materials are one or more of straw, livestock and poultry manure and kitchen garbage, and the organic fertilizer base material is mixed with the straw, the livestock and poultry manure and the kitchen garbage; the organic fertilizer base material and the organic metal framework material are evenly mixed, then the obtained mixture is placed in protective gas to be subjected to low-temperature drying treatment, the solid organic fertilizer is obtained after smashing, the organic metal framework material is any one of UiO-66 series, MOF-808 series and MIL-101 series, preferably MIL-101 (Fe)-SO3H, and the organic metal framework material is any one of UiO-66 series, MOF-808 series and MIL-101 series, preferably MIL-101 (Fe)-SO3H and MIL-101 (Fe)-SO3H. And finally, carrying out microwave hydrolysis treatment on the solid organic fertilizer to obtain the liquid organic fertilizer with improved fertilizer efficiency. According to the method for improving the fertilizer efficiency of the organic fertilizer, the hydrolysis efficiency of the organic fertilizer can be effectively improved, and then the fertilizer efficiency of the organic fertilizer can be improved.

Description

Technical Field

[0001] The invention belongs to the technical field of organic fertilizer manufacturing, and in particular relates to a method for improving the fertilizer efficiency of organic fertilizer. Background Art

[0002] As an environmentally friendly fertilizer, organic fertilizer contains rich organic matter, nitrogen, phosphorus, potassium and other nutrients, which plays an important role in improving soil fertility and soil structure. However, the macromolecular organic matter such as cellulose and hemicellulose in organic fertilizer is difficult to be directly absorbed and utilized by plants, and needs to be decomposed and converted into small molecular substances by microorganisms. This process is time-consuming and its efficiency is affected by many factors, resulting in a low utilization rate of organic fertilizer.

[0003] At present, in order to improve the fertilizer efficiency of organic fertilizer, the main methods include directly adding probiotics to organic fertilizer, changing the fertilization method, etc. Among them, adding probiotics may change the pH of the soil, and changing the fertilization method only improves the environment for plants to absorb nutrients from organic fertilizer, and cannot effectively promote the decomposition of cellulose, hemicellulose, and other macromolecular organic matter in organic fertilizer. In recent years, due to the advantages of organic metal framework materials (MOFs) such as large specific surface area, high porosity, and adjustable structure, the application research on them in catalytic technology has become more and more diversified. Based on the performance characteristics of organic metal framework materials (MOFs) and the application defects of organic fertilizers, the present invention proposes a method for improving the fertilizer efficiency of organic fertilizers. Summary of the invention

[0004] The purpose of the present invention is to provide a method for improving the fertilizer efficiency of organic fertilizer in order to solve the above problems.

[0005] The present invention achieves the above-mentioned purpose through the following technical solutions:

[0006] The present invention provides a method for improving the fertilizer efficiency of organic fertilizer, comprising the following steps:

[0007] (1) fermenting the organic fertilizer raw material to obtain an organic fertilizer base material;

[0008] (2) uniformly mixing the organic fertilizer base material and the organic metal framework material, placing the obtained mixture in a protective gas for low-temperature drying, and crushing to obtain a solid organic fertilizer;

[0009] (3) The solid organic fertilizer is subjected to microwave hydrolysis treatment to obtain liquid organic fertilizer with improved fertilizer efficiency.

[0010] As a further optimization scheme of the present invention, the organic metal framework material is any one of the UiO-66 series, MOF-808 series and MIL-101 series.

[0011] As a further optimization scheme of the present invention, the organic metal framework material is UIO-66-NH 2 , MOF-808(Zr), MIL-101(Cr)-SO 3 and MIL-101(Fe)-SO 3 Any of H.

[0012] As a further optimization scheme of the present invention, the organic metal framework material is MIL-101(Fe)-SO 3 H.

[0013] As a further optimization scheme of the present invention, the raw material of the organic fertilizer is one or more of straw, livestock and poultry manure and kitchen waste.

[0014] As a further optimization scheme of the present invention, in step (1), during fermentation, turmeric water is used to adjust the water content of the organic fertilizer raw material fermentation system.

[0015] As a further optimization scheme of the present invention, the protective gas is composed of a mixed gas of nitrogen and carbon dioxide, and the proportion of carbon dioxide is 5%-10%.

[0016] As a further optimization scheme of the present invention, in step (2), the mixing ratio of the organic fertilizer base material to the organic metal framework material is (10-5):1.

[0017] As a further optimization scheme of the present invention, the fertilizer efficiency of organic fertilizer specifically refers to the content of glucose, xylose and cellobiose in the hydrolyzate of organic fertilizer.

[0018] The beneficial effects of the present invention are:

[0019] The invention mixes Fe-based MOF material MIL-101-SO containing Lewis acid active groups into organic fertilizer. 3 H, achieved the effect of promoting the decomposition of cellulose and hemicellulose, combined with the use of turmeric water to adjust the humidity of the organic fertilizer raw material fermentation system, and the fermentation products of the organic fertilizer raw materials and the Fe-based MOF material MIL-101-SO 3 The mixture of H is placed in a mixed gas of nitrogen and titanium dioxide for low-temperature drying, which further promotes the hydrolysis efficiency and degree of organic fertilizer, strengthens the effect of improving the fertilizer efficiency of organic fertilizer, and is beneficial to improving the utilization rate of nutrients in organic fertilizer by plants. DETAILED DESCRIPTION

[0020] The present application is described in further detail below. It is necessary to point out that the following specific implementation methods are only used to further illustrate the present application and cannot be understood as limiting the scope of protection of the present application. Technicians in this field can make some non-essential improvements and adjustments to the present application based on the above application content.

[0021] 1. Materials

[0022] Unless otherwise specified, the methods used in the present invention are conventional methods known to those skilled in the art, and the reagents and other materials used are commercially available products unless otherwise specified.

[0023] In the present invention, 2 mmol FeCl 3 6H 2 O and 1 mmol of monosodium 2-sulfonate terephthalate were dissolved in 10 mL of DMF by stirring, and the uniformly mixed solution was transferred to a high-pressure reactor and heated in a constant temperature electric oven at 120 °C for 20 h. The heated mixture was then centrifuged to obtain a solid product, which was then treated with C 2 H 5 After the solid product was washed with OH and DMF, the washed solid product was placed at 60 ° C for 6 hours for drying, and the obtained product was the Fe-based MOF material MIL-101-SO 3 H;

[0024] The turmeric water used was obtained by mixing turmeric powder with sterile water in a ratio of 1:20;

[0025] UIO-66-NH 2 purchased from Jiangsu Xianfeng Nanomaterials Technology Co., Ltd., and MOF-808 (Zr) was purchased from Xi'an Qiyue Biology.

[0026] 2. Methods

[0027] 1. Effect of organic metal framework materials on fertilizer efficiency improvement

[0028] Example 1

[0029] A method for improving the fertilizer efficiency of organic fertilizer, specifically comprising the following steps:

[0030] (1) preparing a solid organic fertilizer base material: taking 20 g of straw, 20 g of livestock and poultry manure and 20 g of kitchen garbage as organic fertilizer raw materials, using a ball mill to grind the organic fertilizer raw materials, during which the speed of the ball mill is set to 1200 r / min, the grinding time is 3 h, the various raw materials after grinding are uniformly mixed, and turmeric water is added to the mixed raw materials to adjust the water content to 50%, and finally the mixed raw materials are placed at 50° C. for mixed fermentation for 20 days to obtain an organic fertilizer base material;

[0031] (2) Mix the organic fertilizer base material with MIL-101(Fe)-SO 3 H are uniformly mixed in a ratio of 5:1, and the obtained mixture is placed under a gas protection condition consisting of a mixture of nitrogen and carbon dioxide to be low-temperature dried to a water content of 10%, wherein the proportion of carbon dioxide is 40%, and the temperature of the low-temperature drying treatment is 35°C, and finally the low-temperature dried product is pulverized;

[0032] (3) The solid organic fertilizer was dissolved in an equal amount of water, and the obtained mixed solution was placed in a microwave reactor and reacted at 110° C. for 3 hours to obtain a liquid organic fertilizer A with improved fertilizer efficiency.

[0033] Based on the method of Example 1, liquid organic fertilizer BD with improved fertilizer efficiency was prepared, except that UIO-66-NH 2 , MOF-808(Zr), MIL-101(Cr)-SO 3 Replacement for MIL-101(Fe)-SO 3 H is used as the selected organometallic material.

[0034] Blank example 1

[0035] Take 20g of straw, 20g of livestock and poultry manure and 20g of kitchen garbage as organic fertilizer raw materials, and use a ball mill to crush the organic fertilizer raw materials. During the process, set the speed of the ball mill to 1200r / min, the crushing time to 3h, mix the crushed raw materials evenly, add turmeric water to the mixed raw materials to adjust the water content to 50%, and finally place the mixed raw materials at 50°C for mixed fermentation for 20 days, dry the fermentation product at 35°C to a water content of 10%, and obtain solid organic fertilizer. Dissolve the solid organic fertilizer in an equal amount of water, and then place the obtained mixed solution in a microwave reactor and react at 110°C for 3 hours.

[0036] Equal amounts of samples were obtained from the obtained liquid organic fertilizer AD for improving fertilizer efficiency, and the samples were centrifuged to obtain filtrates. The contents of glucose, xylose and cellobiose in the filtrates were detected by high performance liquid chromatography analysis technology. The test results are shown in the following table:

[0037]

[0038] It can be seen from the above table that the contents of glucose, xylose and cellobiose in the hydrolyzate of the liquid organic fertilizer AD obtained in Example 1 with improved fertilizer efficiency are higher than those in the blank example. This result shows that MIL-101(Fe)-SO 3 H. UIO-66-NH 2 , MOF-808(Zr) and MIL-101(Cr)-SO3 The organic metal framework materials of the type can improve the fertilizer efficiency of organic fertilizers. The contents of the components in the hydrolyzate of the liquid organic fertilizer AD with improved fertilizer efficiency in Example 1 are further compared. The data show that MIL-101(Fe)-SO 3 H is replaced by UIO-66-NH 2 , MOF-808(Zr) and MIL-101(Cr)-SO 3 All of these results will lead to a decrease in the content of glucose, xylose and cellobiose in the hydrolyzate of organic fertilizer. This result shows that the Fe-based MOF material MIL-101-SO 3 The effect of H in the method provided by the present invention is significantly better than that of other types of organic metal materials.

[0039] 2. The effect of gas protection environment during low-temperature drying on the improvement of fertilizer efficiency

[0040] Example 2

[0041] A method for improving the fertilizer efficiency of organic fertilizer, specifically comprising the following steps:

[0042] (1) preparing a solid organic fertilizer base material: taking 20 g of straw, 20 g of livestock and poultry manure and 20 g of kitchen garbage as organic fertilizer raw materials, using a ball mill to grind the organic fertilizer raw materials, during which the speed of the ball mill is set to 1200 r / min, the grinding time is 3 h, the various raw materials after grinding are uniformly mixed, and turmeric water is added to the mixed raw materials to adjust the water content to 50%, and finally the mixed raw materials are placed at 50° C. for mixed fermentation for 20 days to obtain an organic fertilizer base material;

[0043] (2) Mix the organic fertilizer base material with MIL-101(Fe)-SO 3 H are uniformly mixed in a ratio of 10:1, and the obtained mixture is placed under a gas protection condition consisting of a mixture of nitrogen and carbon dioxide to be low-temperature dried to a water content of 10%, wherein the proportion of carbon dioxide is 40%, and the temperature of the low-temperature drying treatment is 35°C, and finally the low-temperature dried product is pulverized;

[0044] (3) The solid organic fertilizer was dissolved in an equal amount of water, and the obtained mixed solution was placed in a microwave reactor and reacted at 110° C. for 3 hours to obtain a liquid organic fertilizer E with improved fertilizer efficiency.

[0045] Based on the method of Example 2, liquid organic fertilizer F with improved fertilizer efficiency was prepared, except that the composition of the protective gas used in the low-temperature drying treatment in step (2) was adjusted, and comparative examples 1-2 were further set according to the composition of the protective gas. The composition of the protective gas in each group was shown in the following table:

[0046]

[0047] Blank example 2

[0048] Adjustments are made based on Example 2, and the specific adjustment method is that no object protection conditions are provided during the low-temperature drying process in step (2).

[0049] Equal amounts of samples were obtained from the liquid organic fertilizers E and F with improved fertilizer efficiency and the liquid organic fertilizers obtained in Comparative Examples 1 and 2 and Blank Example 2, and the hydrolyzates of each sample were tested using the same testing method as above. The test results are shown in the following table:

[0050]

[0051] From the table above we can see that:

[0052] When preparing organic fertilizer, compared with Blank Example 2 in which no gas protection conditions are provided during the low-temperature drying process, in Example 2, Comparative Example 1 and Comparative Example 2 in which gas protection conditions consisting of nitrogen and carbon dioxide are provided, the outputs of glucose, xylose and cellobiose in the organic fertilizer hydrolysate are all greater. This result shows that the gas protection condition is beneficial to promoting the hydrolysis effect of cellulose in the organic fertilizer. Further, the proportions of various components of the organic fertilizer hydrolysate are compared. It can be seen that compared with Comparative Examples 1, 2 and the blank example, in the hydrolysates of E and F of Example 2, the final product of cellulose hydrolysis, glucose, accounts for a higher proportion, and the intermediate products of cellulose hydrolysis, xylose and cellobiose, account for a lower proportion. This result shows that when the content of carbon dioxide in the protective gas is 40%-60%, it is more conducive to enhancing the hydrolysis degree of the organic fertilizer, and the organic fertilizer can release more grape sets, thereby obtaining better fertilizer efficiency.

[0053] 3. The influence of organic fertilizer raw material fermentation system on fertilizer efficiency improvement

[0054] Example 3

[0055] A method for improving the fertilizer efficiency of organic fertilizer, specifically comprising the following steps:

[0056] (1) preparing a solid organic fertilizer base material: taking 20 g of straw, 20 g of livestock and poultry manure and 20 g of kitchen garbage as organic fertilizer raw materials, using a ball mill to grind the organic fertilizer raw materials, during which the speed of the ball mill is set to 1200 r / min, the grinding time is 3 h, the various raw materials after grinding are uniformly mixed, and turmeric water is added to the mixed raw materials to adjust the water content to 50%, and finally the mixed raw materials are placed at 50° C. for mixed fermentation for 20 days to obtain an organic fertilizer base material;

[0057] (2) Mix the organic fertilizer base material with MIL-101(Fe)-SO 3H are uniformly mixed in a ratio of 7:1, and the obtained mixture is placed in a gas protection condition consisting of a mixture of nitrogen and carbon dioxide and dried at low temperature until the water content is 10%, wherein the proportion of carbon dioxide is 40%, and the temperature of the low temperature drying treatment is 35°C, and finally the low temperature dried product is pulverized;

[0058] (3) The solid organic fertilizer was dissolved in an equal amount of water, and the obtained mixed solution was placed in a microwave reactor and reacted at 110° C. for 3 hours to obtain a liquid organic fertilizer G with improved fertilizer efficiency.

[0059] Based on the method of Example 3, a liquid organic fertilizer H with improved fertilizer efficiency was prepared, except that sterile water was used to replace turmeric water;

[0060] Blank example 3

[0061] The method is adjusted based on Example 3, except that the step of adjusting the water content of the mixed raw material in step (1) is omitted;

[0062] Equal amounts of samples were obtained from the liquid organic fertilizers G and H for improving fertilizer efficiency and the liquid organic fertilizer obtained in blank example 3, and the hydrolyzate of each sample was tested using the same testing method as above. The test results are shown in the following table:

[0063]

[0064] From the table above we can see that:

[0065] Compared with Example 3, the data of Blank Example 3 in which the water content of the fermentation system of the organic fertilizer base material was not adjusted were all worse than those of G and H in Example 3. Compared with the liquid organic fertilizer H obtained by adjusting the water content with sterile water in Example 3, the liquid organic fertilizer G used turmeric water, which not only adjusted the water content of the organic fertilizer fermentation system, but also introduced new ingredients into the fermentation system, so that the yield of glucose, xylose and cellobiose obtained by hydrolysis of the organic fertilizer was further improved. This phenomenon shows that in the method for improving the fertilizer efficiency of organic fertilizer provided by the present invention, the application of turmeric water is conducive to achieving better fertilizer efficiency improvement effect.

[0066] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A method for improving the fertilizer efficiency of organic fertilizer, characterized in that: The following steps are involved: (1) fermenting the organic fertilizer raw material to obtain an organic fertilizer base material; (2) uniformly mixing the organic fertilizer base material and the organic metal framework material, placing the obtained mixture in a protective gas for low-temperature drying, and crushing to obtain a solid organic fertilizer; (3) The solid organic fertilizer is subjected to microwave hydrolysis treatment to obtain liquid organic fertilizer with improved fertilizer efficiency.

2. A method for improving the fertilizer efficiency of organic fertilizer according to claim 1, characterized in that, The organic metal framework material is any one of the UiO-66 series, MOF-808 series and MIL-101 series.

3. A method for improving the fertilizer efficiency of organic fertilizer according to claim 2, characterized in that, The organic metal framework material is any one of UIO-66-NH2, MOF-808(Zr), MIL-101(Cr)-SO3 and MIL-101(Fe)-SO3H.

4. A method for improving the fertilizer efficiency of organic fertilizer according to claim 3, characterized in that, The organic metal framework material is MIL-101(Fe)-SO3H.

5. A method for improving the fertilizer efficiency of organic fertilizer according to claim 1, characterized in that, The organic fertilizer raw material is one or more of straw, livestock and poultry excrement and kitchen waste.

6. A method for improving the fertilizer efficiency of organic fertilizer according to claim 1, characterized in that, In the step (1), during fermentation, turmeric water is used to adjust the water content of the organic fertilizer raw material fermentation system.

7. A method for improving the fertilizer efficiency of organic fertilizer according to claim 1, characterized in that, The protective gas is composed of a mixed gas of nitrogen and carbon dioxide, with the carbon dioxide accounting for 40%-60%.

8. A method for improving the fertilizer efficiency of organic fertilizer according to claim 1, characterized in that, In the step (2), the mixing ratio of the organic fertilizer base material to the organic metal framework material is (10-5):

1.

9. A method for improving the fertilizer efficiency of organic fertilizer according to claim 1, characterized in that, The organic fertilizer effect specifically refers to the content of glucose, xylose and cellobiose in the organic fertilizer hydrolyzate.

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