Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

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

An ecological restoration and sludge technology, which is applied in the methods of using microorganisms and the restoration of polluted soils, can solve the problems of long reaction period, secondary pollution and high cost, and achieves shortened culture and domestication period and strong natural tolerance. , Enhance the effect of mercury resistance

Inactive Publication Date: 2016-09-21
QINGDAO TECHNOLOGICAL UNIVERSITY
View PDF2 Cites 3 Cited by
  • 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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

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 mercury salt, control the mol ratio (2-3) of sulfate / mercury: 1, the mass ratio (10-30) of organic carbon / mercury: 1, followed by 5 days of reaction;

[0017] (3) Add mercury to the solution twice, each time controlling the molar ratio of sulfate / mercury (2-3):1, the mass ratio of organic carbon / mercury (10-30):1, and the reaction time is 5 days , and then obtain highly efficient ecological restoration flora.

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 mercury salt, control the mol ratio (1-5) of sulfate / mercury: 1, the mass ratio (30-80) of organic carbon / mercury: 1, followed by 0-1 days of reaction;

[0021] (3) Repeatedly adding mercury to the solution once, controlling the molar ratio of sulfate / mercury (1-5): 1, the mass ratio of organic carbon / mercury (30-80): 1, the reaction time is 1 day, and then obtains high efficiency Ecological restoration flora.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a method for preparing an efficient ecological restoration flora for an Hg-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, mercury 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 mercury salt to the sulfate reducing bacteria is greatly reduced, and the Hg resistance of the cultured sulfate reducing flora is also improved.

Description

technical field [0001] The present invention provides a method for utilizing sludge to prepare efficient ecological restoration flora of Hg polluted sites, by adding carbon source and sulfate to the sludge, the sulfate-reducing flora in the sludge grows rapidly and produces sulfide at the same time; Adding mercury salt consumes sulfide that inhibits the growth of sulfate-reducing bacteria, and the presence of sulfide also greatly reduces the toxicity of mercury salt to sulfate-reducing bacteria, and at the same time improves the Hg 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 Hg. 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 reaction cycle and is likely to cause seco...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C12N1/36B09C1/10
CPCC12N1/36B09C1/10
Inventor 张大磊李瑞栋王欣玉
Owner QINGDAO TECHNOLOGICAL UNIVERSITY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com