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Pig-manure compost preparation method with fast temperature rise and dehydration and less composting time

A technology of composting and pig manure, which is applied in the field of fertilizers, can solve the problems of accelerating the temperature rise rate, the moisture content of composting products, the time required for composting and decomposing, the effect is unstable, and the operation is complicated, so as to achieve significant economic and environmental benefits, reduce composting time, Guaranteed fertilizer effect

Inactive Publication Date: 2009-10-21
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above methods all have limitations such as unstable effects, high cost, and complicated operation. The problems of how to speed up the heating rate, reduce the moisture content of compost products, and shorten the time required for compost maturity have not been properly resolved.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Compost raw materials: Take 100kg of pig manure (water content 70%) from a large-scale pig farm in Hangzhou, add 7kg of sawdust, 4kg of decomposed pig manure compost, 3kg of bamboo charcoal particles, and the particle size of the bamboo charcoal particles is 2mm.

[0013] Add the above-mentioned raw materials in proportion and mix them thoroughly, and adjust the moisture content to about 65%. In the experiment, pig manure was composted by static composting and forced ventilation. Dimensions of the cement compost tank: length × width × height = 1.0m × 0.3m × 0.8m; place two PVC pipes with a diameter of 0.02m at the bottom of the tank, one end is sealed and the other end is connected to the blower. After uniformity, pile it on top of it, and cover it with straw to keep it warm. Ventilation 20m during composting 3 / (h·t), ventilation three times a day, two hours each time.

[0014] After 36 days, the compost reaches maturity, and the pig manure compost product is obtain...

Embodiment 2

[0016] Compost raw materials: Take 100kg of pig manure (water content 72%) from a large-scale pig farm in Hangzhou, add 10kg of straw, 5kg of decomposed pig manure compost, 6kg of bamboo charcoal particles, and the particle size of the bamboo charcoal particles is 3mm.

[0017] Add the above-mentioned raw materials in proportion and mix them thoroughly, and adjust the moisture content to about 65%. In the experiment, a combination of static stack forced ventilation and manual forced turning was used to compost pig manure. Dimensions of the cement compost tank: length × width × height = 1.0m × 0.3m × 0.8m; two PVC pipes with a diameter of 0.02m and holes in the pipe wall are placed at the bottom of the tank body, one end of the pipe is sealed and the other end is connected to the blower, and the filler and The pig manure is mixed according to a certain proportion and piled on top of it, covered with straw to keep warm. Ventilation during composting Ventilation 25m 3 / (h·t), v...

Embodiment 3

[0020] Compost raw materials: Take 100kg of pig manure (water content 75%) from a large-scale pig farm in Hangzhou, add 10kg of sawdust, 5kg of straw, 7kg of decomposed pig manure compost, 9kg of bamboo charcoal particles, and the particle size of the bamboo charcoal particles is 3mm.

[0021] Add the above-mentioned raw materials in proportion and mix them thoroughly, and adjust the moisture content to about 65%. In the experiment, a combination of static stack forced ventilation and manual forced turning was used to compost pig manure. Dimensions of the cement compost tank: length × width × height = 1.0m × 0.3m × 0.8m; two PVC pipes with a diameter of 0.02m and holes in the pipe wall are placed at the bottom of the tank, one end of the pipe is sealed and the other end is connected to the blower, and the composting raw materials are mixed After uniformity, pile it on top of it, and cover it with straw to keep it warm. Air volume 30m during composting 3 / (h·t), ventilation t...

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Abstract

The invention relates to a pig-manure compost preparation method with fast temperature rise and dehydration and less composting time. The prior pig-manure high-temperature composting process has the problems of slow temperature rise, high moisture content of compost products, long composting time and the like. The method comprises the steps: mixing pig manure which is produced by large-scale piggeries and has the moisture content of between 70 and 75 percent with fillers, thoroughly decomposed pig-manure compost and bamboo charcoal particles; placing the mixture in a composting groove; composting the mixture by adopting a static forced ventilation mode with the ventilation volume between 20 and 30 m / (h.t) for 30 to 36 days to thoroughly decomposing the compost; and obtaining a pig-manure compost product, wherein the fillers are sawdust or straw. The method can reduce nutrient loss in a composting process and guarantee the fertilizer efficiency of the compost. The method has the advantages of convenient application, low cost, no secondary pollution caused by a production process, significant economic and environmental benefit.

Description

technical field [0001] The invention belongs to the technical field of fertilizers, and in particular relates to a pig manure composting preparation method which uses bamboo charcoal as an additive to quickly heat up and dehydrate and shorten the composting time. Background technique [0002] In recent years, the intensive pig farming industry in large and medium-sized cities in my country has developed rapidly, and the amount of pig manure produced has also increased. Because pig manure contains a variety of pathogenic microorganisms, antibiotics, breeds flies and can release odor, pig manure has become one of the main causes of environmental pollution in my country, and the harmless treatment of pig manure is imperative. In addition, pig manure is also rich in nitrogen, phosphorus, potassium and other macroelements as well as various trace elements needed by plants. Its organic matter content is as high as 60% to 75%. Land use after pig manure composting is a recognized A...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05F17/00
CPCY02W30/40
Inventor 陈英旭黄向东吴伟祥韩志英石德智
Owner ZHEJIANG UNIV
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