Deep dehydration recycling method for livestock and poultry feces

A technology of poultry manure and recycling method, which is applied in the direction of dehydration/drying/concentrated sludge treatment, etc., can solve the problems of high cost, difficulty in popularization, high energy consumption of livestock and poultry manure, and achieve low cost, prevent water body eutrophication, Conducive to the effect of resource utilization

Active Publication Date: 2014-04-16
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Drying livestock and poultry manure by high-temperature drying often consumes a lot of energy, and the resulting cost is very high, so it is difficult to promote

Method used

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  • Deep dehydration recycling method for livestock and poultry feces
  • Deep dehydration recycling method for livestock and poultry feces

Examples

Experimental program
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Effect test

Embodiment 1

[0039] A method for deep dehydration and recovery of poultry manure, comprising the following steps:

[0040] a. The pH of the pig manure obtained by the method of flushing manure with water is adjusted to 4 with sulfuric acid, and the moisture content of the pig manure is 97%.

[0041] b. Add [Fe] to the pH-adjusted pig manure at a ratio of 0.4 mol iron ion per kilogram of dry weight of pig manure 2 (OH) n (SO 4 ) (3-n) / 2 ] m(polymerized ferric sulfate), stir evenly, then add hydrogen peroxide at a ratio of 1.0mol hydrogen peroxide per kilogram of dry weight of pig manure, and stir rapidly for 50 minutes.

[0042] c. Add quicklime to the pig manure after the above treatment, add 30g quicklime per kilogram of dry weight of pig manure, adjust the pH value of pig manure to 10.5, and stir evenly.

[0043] d. The pig manure added with quicklime is filtered and dehydrated by a membrane filter press to obtain dehydrated pig manure. The pore diameter of the filter cloth of the m...

Embodiment 2

[0046] A method for deep dehydration and recovery of poultry manure, comprising the following steps:

[0047] a. After adjusting the moisture content of the cow dung (initial moisture content 85%) obtained by the dry dung cleaning process to 92%, adjust the pH of the cow dung with the adjusted moisture content to 3 with hydrochloric acid.

[0048] b. Add FeCl to the pH-adjusted cow manure at a ratio of 0.3 mol of ferrous ion per kilogram of dry weight of cow manure 2 , stir evenly, then add hydrogen peroxide at a ratio of 1.4mol hydrogen peroxide per kilogram of dry weight of cow dung, and stir rapidly for 100 minutes.

[0049] c. Add slaked lime to the cow dung after the above treatment, add 10g of slaked lime per kilogram of dry weight of cow dung, adjust the pH value of cow dung to 9.5, and stir evenly.

[0050] d. Dehydrate the cow dung after adding slaked lime through a membrane filter press to obtain dehydrated cow dung. The pore diameter of the filter cloth of the memb...

Embodiment 3

[0053] A method for deep dehydration and recovery of poultry manure, comprising the following steps:

[0054] a. The pH of the pig manure obtained by soaking manure in water is adjusted to 4 with nitric acid, and the water content of the pig manure is 90%.

[0055] b. Add FeS0 to the pH-adjusted pig manure at a rate of 0.15 mol of ferrous ion per kilogram of dry weight of pig manure 4 , Stir evenly, then add hydrogen peroxide at a ratio of 1.1mol hydrogen peroxide per kilogram of dry weight of pig manure, and stir rapidly for 60 minutes.

[0056] c. Add calcium chloride to the pig manure after the above treatment, add 40g of calcium chloride per kilogram of dry weight of pig manure, adjust the pH value of pig manure to 8.5, and stir evenly.

[0057] d. The pig manure added with calcium chloride is dehydrated through a chamber filter press to obtain dehydrated pig manure. The pore diameter of the filter cloth of the compartment filter press is about 60 μm.

[0058] The capill...

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Abstract

The invention relates to the field of livestock and poultry feces treatment methods, and in particular relates to a deep dehydration recycling method for livestock and poultry feces. The method specifically comprises the following steps: adjusting the pH value of the livestock and poultry feces to be 2-4, adding ferrite or ferric salt into the livestock and poultry feces with the adjusted pH value, uniformly stirring, subsequently adding hydrogen peroxide into the livestock and poultry feces, stirring for 50-180 minutes, adding a phosphorus curing agent into the treated livestock and poultry feces, adjusting the pH value to be 8.5-10.5, uniformly stirring, and performing filter pressing on the treated livestock and poultry feces by a filer press for dehydration. The method is high in speed, short in period, high in solid recycling rate, high in dehydration degree, low in energy consumption and low in cost.

Description

technical field [0001] The invention relates to the field of poultry manure treatment methods, in particular to a method for deep dehydration and recovery of poultry manure. Background technique [0002] In 2003, the amount of manure produced by poultry and livestock in my country was about 3.19 billion tons, which was 3.2 times that of solid waste (1 billion tons) produced by industry in that year, and the amount of manure produced by poultry and livestock is increasing year by year. While the total amount of poultry and livestock manure is large, the degree of intensification of the poultry and livestock breeding industry continues to increase. In 2009, the scale of live pigs, dairy cows and laying hens reached 61%, 42%, and 79% respectively, which makes poultry and livestock manure The contradiction between the environment and the environment has gradually become prominent, and the adverse effects of poultry manure on water, soil and atmospheric environment have attracted...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/14
Inventor 袁兴中肖智华李辉蒋龙波吴志斌陈晓红曾光明
Owner HUNAN UNIV
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