Method for preparing solid organic carbon fertilizer with livestock and poultry breeding waste as raw material

A livestock and poultry breeding and waste technology, which is applied in the field of organic carbon fertilizer preparation, can solve the problems of slow decomposition of organic matter, secondary pollution of the environment, and occupation of a large amount of land, and achieve the effects of increasing dissolution, saving energy, and reducing loss

Inactive Publication Date: 2018-12-04
ZHEJIANG FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, biogas engineering is the main method to control livestock and poultry manure pollution, but if there is no post-treatment, the fermented biogas slurry and biogas residue will still bring severe environmental problems; while the traditional composting method is slow to decompose organic matter and occupies a large amount of land. Moreover, nitrogen will be released into the atmosphere, causing stench and causing secondary pollution to the environment; in addition, heavy metals will eventually enter the soil with the application of biogas manure (including biogas slurry and biogas residue) and organic fertilizer, causing soil pollution. Pollution and plant poisoning

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A method for preparing solid organic carbon fertilizer from livestock and poultry breeding waste, comprising the following steps,

[0027] A. Transport the breeding waste to the mixing tank, stir until it is uniformly muddy, adjust the pH value to 5.5 at the same time, adjust the moisture content of the livestock and poultry breeding waste to 80%, and obtain the pretreated livestock and poultry breeding waste ;

[0028] B. The pretreated livestock and poultry breeding waste is transported to the hydrothermal carbonization furnace by the sludge pump. The temperature is controlled at 160°C and the time is controlled at 1h. The carbonized product is mechanically dehydrated, and the moisture content after dehydration is controlled at 10%, wet granulation and drying to obtain solid organic carbon fertilizer.

[0029] The prepared organic carbon fertilizer test results are as follows: the organic carbon fertilizer yield is 66%, the TN content is 2.92%, and the P 2 o 5 The ...

Embodiment 2

[0031] A method for preparing solid organic carbon fertilizer from livestock and poultry breeding waste, comprising the following steps,

[0032] A. Transport the cow dung to the mixing tank, stir until it becomes uniform mud, adjust the pH value to 6.5 at the same time, adjust the moisture content of the cow dung to 75%, and obtain the pretreated cow dung;

[0033] B. The pretreated cow dung is transported to the hydrothermal carbonization furnace by the sludge pump, the temperature is controlled at 180 ° C, and the time is controlled at 3 hours. The carbonized product is mechanically dehydrated. The moisture content after dehydration is controlled at 20%. granulation and drying to obtain solid organic carbon fertilizer.

[0034] The detection result of prepared organic carbon fertilizer is as follows: organic carbon fertilizer yield rate is 64%, TN content is 1.23%, P 2 o 5 The content is 2.28%, K 2 The O content is 0.55%, the organic carbon content is 45%, the pH value i...

Embodiment 3

[0036] A method for preparing solid organic carbon fertilizer from livestock and poultry breeding waste, comprising the following steps,

[0037] A. Transport the pig manure to the mixing tank, stir until it becomes uniform mud, adjust the pH value to 5.7 at the same time, adjust the moisture content of the pig manure to 70%, and obtain the pretreated pig manure;

[0038] B. The pretreated pig manure is transported to the hydrothermal carbonization furnace by the sludge pump, the temperature is controlled at 200°C, and the time is controlled at 5h. The carbonized product is dehydrated, and the moisture content after dehydration is controlled at 15%. Wet method Granulating and drying to obtain solid organic carbon fertilizer.

[0039] The prepared organic carbon fertilizer test results are as follows: the organic carbon fertilizer yield is 61%, the TN content is 2.92%, and the P 2 o 5 The content is 5.91%, K 2 The O content is 1.18%, the organic carbon content is 56.6%, the ...

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Abstract

The invention relates to the technical field of organic carbon fertilizer and discloses a method for preparing solid organic carbon fertilizer with livestock breeding waste being a raw material. The method includes the steps that a, livestock excrement is stirred evenly, and the water and pH value are adjusted; b, the preprocessed livestock excrement is conveyed into a hydrothermal carbonization oven, and a carbonized product is subjected to dehydration, wet granulation and drying to obtain the solid organic carbon fertilizer. The low-temperature hydrothermal carbonization technology is adopted for converting the livestock breeding waste into the organic carbon fertilizer, the preparation technology is simple and easy to implement, the problem that the ecological environment of the breeding industry is polluted is solved, and the value of the breeding waste is brought into full play. The technology is put into the market to generate great economic benefits and environmental benefits.

Description

technical field [0001] The invention relates to the technical field of preparation of organic carbon fertilizers, in particular to a method for preparing solid organic carbon fertilizers by using livestock and poultry breeding waste as raw materials. Background technique [0002] With the development of the breeding industry, my country's livestock and poultry breeding pollution is becoming more and more serious, and has become an important source of environmental pollution in China. In 2013, the chemical oxygen demand and ammonia nitrogen emissions of the livestock and poultry breeding industry reached 10.719 million tons and 605,000 tons, respectively. It accounts for 45.6% and 24.6% of the national total emissions respectively, accounting for 95.0% and 79.0% of agricultural sources. [0003] At present, the main treatment methods of livestock and poultry farming waste in my country are: anaerobic fermentation to produce biogas and compost. Among them, biogas engineering i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C05F3/00
CPCY02A40/20
Inventor 宋成芳单胜道
Owner ZHEJIANG FORESTRY UNIVERSITY
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