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Method for lowering bio-availability of Cu and Zn in pig manure based on biomass pyrolysis technology

A biomass pyrolysis and bioavailability technology is applied in the field of reducing the bioavailability of Cu and Zn in pig manure based on biomass pyrolysis technology. The effect of sufficient raw materials, environmental protection, and easy availability of raw materials

Inactive Publication Date: 2016-07-27
JIANGXI AGRICULTURAL UNIVERSITY
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Problems solved by technology

[0004] In order to solve the problem that the higher Cu and Zn content in livestock and poultry manure hinders its resource utilization and the shortage of livestock and poultry manure biochar, the purpose of this invention is to provide a method based on biomass pyrolysis technology to reduce Cu and Zn in pig manure. methods of bioavailability

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  • Method for lowering bio-availability of Cu and Zn in pig manure based on biomass pyrolysis technology
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  • Method for lowering bio-availability of Cu and Zn in pig manure based on biomass pyrolysis technology

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Embodiment 1

[0027] Example 1 Optimization of pyrolysis temperature, pyrolysis time and pig manure chaff ratio

[0028] Dry the collected pig manure and chaff, remove impurities (remove gravel, hair, straw and other sundries), crush them and pass through a 20-mesh sieve; mix pig manure and chaff according to a certain ratio (1:0, 3:1, 1:1, 1:3), placed in an oven at 75°C and baked to constant weight, put 4 kinds of raw materials with different ratios into crucibles, filled and compacted, covered with a lid, placed in a crucible Furnace; heating rate is 20°C min -1 ; The final temperature is 500°C and 700°C; the holding time is 2h, 4h, and 6h; compare the yield, ash, pH, and heavy metal Cu of biochar under different pyrolysis temperatures, different pyrolysis times, and different raw material ratios And the total amount of Zn and its effective state content (see Table 1-6).

[0029] Table 1 Yields of biochar pyrolyzed for 2h, 4h, and 6h at 500°C and 700°C with different pig manure and cha...

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Abstract

The invention discloses a method for lowering bio-availability of Cu and Zn in pig manure based on the biomass pyrolysis technology. The method comprises the steps that pig manure and rice husks are dried in the sun and smashed to be screened by a 20-mesh sieve; the pig manure and the rice husks are mixed on the basis that the ratio is (1-3):(0-3) and placed into a drying oven under the temperature of 75 DEG C to be dried to constant weight; the mixture of the pig manure and the rice husks dried to the constant weight is placed into a crucible, compacted and covered with a lid, and then placed into a muffle furnace; the heating rate is 20 DEG C / min, the final temperature is 500 DEG C-700 DEG C, and the pyrolysis time is 2-6 h. The content of the effective state Cu and Zn in obtained charcoal under the pyrolysis condition and the rate thereof are remarkably lowered, the problem that resource utilization is obstructed due to the fact that the content of Cu and Zn in livestock manure is high is effectively solved, and the defects of livestock manure charcoal are overcome.

Description

technical field [0001] The invention relates to the fields of utilization of biomass resources and reduction of environmental pollution, and in particular to a method for reducing the bioavailability of Cu and Zn in pig manure based on biomass pyrolysis technology. Background technique [0002] Pig manure is a kind of fertilizer resource, which is rich in N, P, K and other macronutrient elements, as well as various trace elements such as Cu and Zn necessary for plant growth. Application of pig manure can fertilize soil, improve soil microbial activity, promote nutrient cycle and improve crop yield and quality. However, with the development of the breeding industry and the feed industry, the material composition and content of modern intensive breeding livestock and poultry have undergone great changes. In the process of intensive farming, compound feeds are mostly used for breeding. In order to prevent and control livestock diseases, improve feed utilization efficiency and ...

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Application Information

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IPC IPC(8): C05G3/04C05G3/80
CPCC05G3/80
Inventor 黄山杨陶陶曾勇军潘晓华石庆华
Owner JIANGXI AGRICULTURAL UNIVERSITY
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