Method for increasing humic acid content of compost through stage treatment

A humic acid and composting technology, applied in the directions of microbial treatment, combined biological treatment, preparation of organic fertilizers, etc., can solve the problems such as the decline in the production quality of humic acid, affecting the efficiency of humus, affecting the quality of compost, etc. Achieve directional humification and accelerate the effect of oxidative polymerization

Pending Publication Date: 2021-04-06
NORTHEAST AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the substrate competition between humus formation and microbial activity will inevitably affect the efficiency of humus formation, and then the quality of humic acid production will decrease, thereby affecting the quality of compost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] Experimental materials: rice straw comes from the remnants of rice harvested in the previous year; chicken manure comes from fresh samples from chicken farms; lignocellulose high-efficiency hydrolysis bacteria agent comes from straw decomposing agent produced by Heilongjiang Junyiliangkang Technology Development Co., Ltd. ;

[0058] The method of the present embodiment is made up of following steps:

[0059] 1. Before starting composting, crush the obtained rice straw to a length of 2 to 3 cm; use the configured Fenton’s reagent (Fenton’s solvent accounts for 80% of the dry weight of the straw), soak at 25° C. for 2 hours, and obtain a pre-hydrolyzed product; The Fenton's reagent uses hydrogen peroxide aqueous solution with a volume concentration of 30% as a solvent, and ferrous chloride is dissolved; the volume molar concentration ratio of the ferrous chloride and hydrogen peroxide is 0.02:1.5.

[0060] 2. Then use chicken manure to adjust the C / N of the pre-hydrolyze...

Embodiment 2

[0066] 1. Before starting composting, crush the obtained rice straw to a length of 2 to 3 cm; use the prepared concentrated nitric acid (8M) to soak for 12 hours at 25°C to obtain a pre-hydrolyzed product; the concentrated nitric acid is soaked at a ratio of 10ml per gram of straw .

[0067] 2. Then use chicken manure to adjust the C / N of the pre-hydrolyzed product to 28:1, and use Ca(OH) with a concentration of 0.02M 2 The aqueous solution is neutralized by acid and alkali, the pH value of the pre-hydrolyzed product is adjusted to 7, and the moisture content of the pre-hydrolyzed product is adjusted to 65% by distilled water to obtain compost materials.

[0068] 3. Pile the composted materials for the first composting, and after the first composting enters the high temperature period (the central temperature of the composting body is 50° C.), the first composting is obtained;

[0069] 4. Inoculate the lignocellulose high-efficiency hydrolysis bacteria agent into the first st...

Embodiment 3

[0074] 1. Before starting composting, crush the obtained corn stalks to a length of 2 to 3 cm; use the prepared Fenton reagent (Fenton’s solvent accounts for 80% of the dry weight of the straw), soak at 25°C for 2 hours, and obtain a pre-hydrolyzed product;

[0075]2. Then use chicken manure to adjust the C / N of the pre-hydrolyzed product to 28:1, and use Ca(OH) with a concentration of 0.02M 2 The aqueous solution is neutralized by acid and alkali, the pH value of the pre-hydrolyzed product is adjusted to 7, and the moisture content of the pre-hydrolyzed product is adjusted to 65% by distilled water to obtain compost materials.

[0076] 3. Pile the composted materials and perform the first composting. After the first composting enters the high temperature period (the central temperature of the heap body is 50° C.), inoculate the lignocellulose high-efficiency hydrolysis bacteria agent into the pre-hydrolyzed product to obtain the second A pile of materials; the lignocellulose ...

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Abstract

The invention provides a method for increasing compost humic acid content through stage treatment, belongs to the technical field of solid organic waste treatment and resource utilization, and aims to pre-hydrolyze organic solid waste to be treated and destroy a lignocellulose crystal connection structure in the organic solid waste to be treated. According to the method, the lignocellulose efficient hydrolysis microbial inoculum is added before composting to promote hydrolysis of organic components, ventilation is stopped while a functional material is added in the high-temperature stage of composting, rapid condensation of a humic acid precursor compound is promoted to form humic acid, and a substrate is provided for humic acid formation; after ventilation is recovered, the functional material stimulates enzyme activity, and oxidative polymerization of the humic acid precursor is further accelerated. In the compost cooling period, mineral substances and metal ion oxides are added into the compost body, and formed humic acid molecules are protected against further hydrolysis by microorganisms.

Description

technical field [0001] The invention relates to the technical field of solid organic waste treatment and resource utilization, in particular to a method for increasing the humic acid content of compost through stage treatment. Background technique [0002] Large quantities of organic solid waste discarded carelessly are destroying soil fertility. Harmful by-products such as landfill leachate and odor can cause water eutrophication, air pollution, and even threaten human health. Composting, as a fast and safe way to recycle organic waste, is gaining more and more attention. At the same time, humic acid, as the most important by-product in the composting process, has a certain repairing effect on environmental pollution, and can improve soil fertility, promote crop growth, absorb heavy metals and organic dyes and other important functions. Therefore, in the face of a large amount of organic waste, increasing the production of humic acid during composting may be the best way ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05F17/10C05F17/20C05F17/50C05F15/00
CPCC05F3/00C05F17/10C05F17/20C05F17/50C05F11/00C05F11/08Y02W30/40
Inventor 魏自民吴俊秋赵越张旭解新宇陈晓蒙康可佳杨宏艳
Owner NORTHEAST AGRICULTURAL UNIVERSITY
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