Method for preparing efficient ecological restoration flora for Cu-polluted site by utilizing sludge

An ecological restoration and sludge technology, applied in the methods of using microorganisms and the restoration of polluted soil, can solve the problems of long reaction period, secondary pollution, high energy consumption, etc., and achieve shortened culture and domestication period and natural tolerance. Strong force, stable effect of bivalent pass

Inactive Publication Date: 2016-09-21
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 the sludge 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 dry sludge content of 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 copper salt, control the mol ratio (2-3) of sulfate / copper salt: 1, the mass ratio of organic carbon / Cu (10-30) :1, followed by reaction for 5 days;

[0017] (3) Repeatedly add copper salt to the solution 2 times, each time controlling the molar ratio (2-3) of sulfate / copper salt: 1, the mass ratio of organic carbon / copper (10-30): 1, and the reaction time After 5 days, high-efficiency ecological restoration flora was obtained.

Embodiment 2

[0019] (1) Mix the sludge with a solution containing a certain amount of carbon source, add a certain amount of sulfate, put it into the reactor for biochemical reaction, control the dry sludge content of the mixed solution to 8-10%, and the solid content to 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 copper salt, control the mol ratio (1-5) of sulfate / copper salt: 1, the mass ratio of organic carbon / copper (30-80) :1, followed by 0-1 days of reaction;

[0021] (3) repeatedly add copper salt 1 time in solution, control the mol ratio (1-5) of sulfate / copper salt: 1, the mass ratio (30-80) of organic carbon / copper: 1, reaction time 1 day, Then obtain highly efficient ecological restoration flora.

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Abstract

The invention provides a method for preparing an efficient ecological restoration flora for a Cu-polluted site by utilizing sludge. According to the method, by adding a carbon source and sulfate into the sludge, a sulfate reducing flora in the sludge rapidly grows, and sulfides are generated at the same time; then, copper salt is added into the sludge, and the sulfides capable of inhibiting the growth of the sulfate reducing bacteria are consumed; due to the existence of the sulfides, the toxicity of the copper salt to the sulfate reducing bacteria is greatly reduced, and the Cu resistance of the cultured sulfate reducing flora is also improved.

Description

technical field [0001] The present invention provides a kind of method that utilizes sludge to prepare highly efficient ecological restoration flora of Cu polluted site, by adding carbon source and sulfate to sludge, make the sulfate reducing flora in sludge grow rapidly, produce sulfide at the same time; Adding copper salt consumes sulfide that inhibits the growth of sulfate-reducing bacteria, and the presence of sulfide also greatly reduces the toxicity of copper salt to sulfate-reducing bacteria, and at the same time improves the Cu resistance of the cultured sulfate-reducing bacteria. field of environmental protection. Background technique [0002] Due to the arbitrary discharge of mining and metallurgical wastewater, a large amount of soil is polluted by Cu. Current methods of treating copper-bearing soils are flawed. 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 seco...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12N1/36B09C1/10
CPCB09C1/10C12N1/36
Inventor 张大磊李瑞栋王欣玉
Owner QINGDAO TECHNOLOGICAL UNIVERSITY
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