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Eluting agent for removing heavy metals in agricultural solid organic compost and removal method using the same

A technology for organic composting and leaching agent, which is applied in agriculture, fertilization devices, fertilizer mixtures, etc., can solve the problems of long time, highly toxic intermediate metabolites, limited application scope, incomplete treatment, etc., and achieves simple formula and low cost. , the effect of convenient management

Inactive Publication Date: 2014-08-13
ANHUI SCI & TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods have the characteristics of incomplete treatment, long time-consuming, easy production of highly toxic intermediate metabolites, and limited application range.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The decomposed compost made from chicken manure and wheat straw is placed in the leaching tank. Add 3% alkyl polyglycoside, 2% phosphatidylethanolamine (phosphatidylcholine or phosphatidic acid), 1% mannolin, and water as the balance, and rinse. The amount of eluent is 4-6 times the volume of the compost. Rinse once a day for 2 days, and then rinse once with water as the eluent to obtain the compost that has removed heavy metals. The cumulative removal rate of various heavy metals: copper 66.2%, zinc 64.3%, arsenic 72.4%, selenium 55.9%. After treatment, the content of various heavy metals in the compost reaches the national standard.

Embodiment 2

[0029] The decomposed compost using pig manure and wheat straw as raw materials is placed in the leaching tank. Add 2.5% alkyl polyglycoside, 1.5% phosphatidylethanolamine (phosphatidylcholine or phosphatidic acid), 1% mannoprotein, and water as the balance, and rinse. The amount of eluent is 4-6 times the volume of the compost. Rinse once a day for 2 days, and then rinse once with water as the eluent to obtain the compost that has removed heavy metals. The cumulative removal rate of various heavy metals: copper 73.1%, zinc 42.9%, arsenic 56.3%, selenium 46.8%. After treatment, the content of various heavy metals in the compost reaches the national standard.

Embodiment 3

[0031] The decomposed compost using cow dung and wheat straw as raw materials is placed in the leaching tank. Add 2% of alkyl polyglycosides, 2% of phosphatidylethanolamine (phosphatidylcholine or phosphatidic acid), 1% of mannan, and water as the balance, and rinse. The amount of eluent is 4-6 times the volume of the compost. Rinse once a day for 2 days, and then rinse once with water as the eluent to obtain the compost that has removed heavy metals. The cumulative removal rate of various heavy metals: copper 47.1%, zinc 72.4%, arsenic 84.8%, selenium 86.2%. After treatment, the content of various heavy metals in the compost reaches the national standard.

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PUM

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Abstract

The invention discloses an eluting agent for removing heavy metals in agricultural solid organic compost and a removal method using the same. The eluting agent is prepared from 2-4wt% of alkyl polyglycoside, 1-2wt% of phosphatidylethanolamine (phosphatidylcholine or phosphatidic acid), 1wt% of mannoprotein and the balance water. The removal method comprises the following steps of putting decomposed organic compost into a cement pool, eluting the decomposed organic compost by an eluant of which the volume is 4-6 times that of the organic compost from a position above the organic compost, carrying out re-eluting by the eluant once after 12-24h after the eluting, carrying out eluting again by water, collecting the eluting solution, and adding excess sodium hydroxide into the eluting solution so that heavy metals in the filtrate are precipitated. The biochemical eluting agent has a simple formula, substantial effects, good removal effects on copper, zinc, arsenic and selenium in the compost and characteristics of low cost and high restoration efficiency.

Description

Technical field [0001] The invention belongs to the technical field of organic fertilizer treatment, and specifically relates to a leaching agent for removing heavy metals in agricultural solid organic compost and a removal method. Background technique [0002] my country's livestock and poultry breeding industry has developed rapidly, and the discharge of livestock and poultry manure in my country has reached 4.5 billion tons. However, the harmless treatment of livestock manure has been delayed, which has caused serious environmental pollution and directly affected the growth of livestock and poultry and human health. On the other hand, livestock manure is a valuable resource in agricultural production, and 4.5 billion tons of livestock manure can produce nitrogen and phosphorus of 15.97 million tons and 3.63 million tons, which is equivalent to 78.9% and 78.9% of my country’s chemical fertilizer consumption in the same period. 57.4%, so strengthening the harmless treatment of l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00
Inventor 赵建荣秦改花汪建飞张平高翔李孝良周毅
Owner ANHUI SCI & TECH UNIV
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