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Method for preparing Sb contaminated site efficient ecological remediation flora from biogas residues

A technology of ecological restoration and biogas residue, which is applied in the direction of using microorganisms and the recovery of contaminated soil, etc., can solve the problems of long reaction cycle, secondary pollution, high energy consumption, etc., and achieve the reduction of cultivation and domestication cycle and natural tolerance The effect of strong power and improved economy

Inactive Publication Date: 2016-10-12
QINGDAO TECHNOLOGICAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The high temperature melting method is costly and consumes a lot of energy
The biological method has a long reaction cycle and is likely to cause secondary pollution by foreign biological agents
The effect of the curing method is unstable, and the curing agent is likely to cause secondary pollution to the soil
Patent No. 201510056406.6 introduces a solidification method for soil containing heavy metals, but this method uses a large amount of materials, and the cost is high. On the other hand, the solidification effect is unstable. For example, the added calcium oxide is prone to carbonation under natural conditions. Reduces the effect of alkaline curing

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] (1) Mix biogas residue with a solution containing a certain amount of carbon source, add a certain amount of sulfate, and put it into a reactor for biochemical reaction. Control the content of dry biogas residue in the mixed solution to 0.5%, and the solid content to 10%, The organic carbon content is 12%, and the mass ratio of organic carbon / sulfate is 5:1, followed by reaction for 1 day;

[0016] (2) in the solution after step (1) reaction, add a certain amount of antimonate, control the mol ratio (2-3) of vitriol / antimonate: 1, the mass ratio of organic carbon / antimony (10- 30): 1, followed by reaction for 5 days;

[0017] (3) Repeatedly adding antimonate 2 times in the solution, each time controlling the mol ratio (2-3) of sulfate / antimonate: 1, the mass ratio of organic carbon / antimony (10-30): 1, The reaction time was 5 days, and then the highly efficient ecological restoration flora was obtained.

Embodiment 2

[0019] (1) Mix biogas residue with a solution containing a certain amount of carbon source, add a certain amount of sulfate, and put it into a reactor for biochemical reaction. Control the content of dry biogas residue in the mixed solution to be 8-10%, and the solid content to be 10- 15%,, the organic carbon content is 10-15%, the mass ratio of organic carbon / sulfate is 20:1, and then reacted for 0.1-1 day;

[0020] (2) in the solution after step (1) reaction, add a certain amount of antimonate, control the mol ratio (1-5) of vitriol / antimonate: 1, the mass ratio of organic carbon / antimony (30- 80): 1, followed by reaction for 0-1 days;

[0021] (3) Repeatedly add antimonate to the solution once, control the molar ratio of sulfate / antimonate (1-5):1, the mass ratio of organic carbon / antimony (30-80):1, and the reaction time is 1 days, and then obtain highly efficient ecological restoration flora.

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Abstract

The invention provides a method for preparing an Sb (V) contaminated site efficient ecological remediation flora from biogas residues. By adding a carbon source and sulfate to the biogas residues, a sulfate-reducing flora in the biogas residues achieves rapid growth, and meanwhile sulfide is generated; and then, antimonate is added to the biogas residues to consume and inhibit the sulfide which grows from the sulfate-reducing flora, due to the existence of the sulfide, the toxicity of the antimonate on the sulfate-reducing flora is also greatly reduced, and meanwhile, the Sb-resistant performance of the cultured sulfate-reducing flora is also improved.

Description

technical field [0001] The invention provides a method for using biogas residues to prepare highly efficient ecological restoration flora of Sb-contaminated sites. By adding carbon sources and sulfates to biogas residues, the sulfate-reducing flora in biogas residues can grow rapidly and produce sulfide at the same time; Adding antimonate consumes sulfide that inhibits the growth of sulfate-reducing bacteria, and the presence of sulfide also greatly reduces the toxicity of antimonate to sulfate-reducing bacteria, and at the same time improves the Sb resistance of the cultured sulfate-reducing bacteria , which belongs to the field of environmental protection. Background technique [0002] Due to the random discharge of mining and metallurgical wastewater, a large amount of soil is polluted by Sb. Current methods of treating mercury-containing soils are flawed. The high temperature melting method is costly and consumes a lot of energy. The biological method has a long react...

Claims

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Application Information

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IPC IPC(8): C12N1/36B09C1/10
CPCC12N1/36B09C1/10
Inventor 张大磊李瑞栋王欣玉
Owner QINGDAO TECHNOLOGICAL UNIVERSITY
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