Preparation method of remediation flora for Cr (VI) contaminated site from sludge

A site remediation and sludge technology, applied in the restoration of polluted soil, biochemical equipment and methods, microorganisms, etc., can solve the problems of high cultivation cost of remediation bacteria, difficulty in adapting to the surrounding environment, low treatment efficiency, etc. Environmental and economic benefits, strong tolerance, complex effects

Active Publication Date: 2014-08-13
上海洁壤环保科技有限公司
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Problems solved by technology

Microbial treatment is a cheap Cr(VI)-contaminated site remediation method, but the culture cost of related remediation bacteria is high, and it is generally difficult to adapt to the surrounding environment
Patent Nos. 201010176068.7 and 200910043841.X both introduced the method of reducing Cr(VI) by using special strains, but the cost of pure culture of the above two strains is too high; and it is difficult for the strains to become the dominant strains in the field during actual use , leading to low treatment efficiency, which generally takes more than 4 days to process; at the same time, introducing new strains into the environment also has the risk of biochemical pollution

Method used

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  • Preparation method of remediation flora for Cr (VI) contaminated site from sludge

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example 1

[0020] The flow chart of bacterial culture is as follows: figure 1 As shown, the specific cultivation is divided into start-up phase, domestication phase and continuous cultivation phase, the steps are as follows:

[0021] (1) In the start-up phase, mix digested sludge, facultative tank sludge and high-concentration organic wastewater at a ratio of 1:0.2:10, and add a certain amount of sulfate, Cr(VI) and Fe(III) at the same time to make the above The concentrations of the three in the mixture are: 200 mg / L (sulfate), 10 mg / L (Cr(VI)) and 5mg / L (Fe(III)). Put the above mixed liquid into the digestion reactor, stir continuously to make it evenly mixed, and at the same time, lead out the generated waste gas for discharge. After reacting the mixed liquid in the digestion reactor for 3 days, discharge 2 / 3 of the digestion liquid in the reactor and send it to the sedimentation tank; after the discharged digestion liquid is still in the sedimentation tank for 30 minutes, discharge ...

example 2

[0028] The flow chart of bacterial culture is as follows: figure 1 As shown, the specific cultivation is divided into start-up phase, domestication phase and continuous cultivation phase, the steps are as follows:

[0029] (1) In the start-up phase, mix digested sludge, facultative tank sludge and high-concentration organic wastewater at a ratio of 1:0.5:15, and add a certain amount of sulfate, Cr(VI) and Fe(III) at the same time to make the above The concentrations of the three in the mixture are: 200 mg / L (sulfate), 10 mg / L (Cr(VI)) and 5mg / L (Fe(III)). Put the above mixed liquid into the digestion reactor, stir continuously to make it evenly mixed, and at the same time, lead out the generated waste gas for discharge. After reacting the mixed liquid in the digestion reactor for 2 days, discharge 1 / 2 of the digestion liquid in the reactor and send it to the sedimentation tank; after the discharged digestion liquid is still in the sedimentation tank for 30 minutes, discharge ...

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Abstract

The invention discloses a preparation method of remediation flora for Cr (VI) contaminated site from sludge. The method uses sludge as the main source of bacteria strain and high-concentration organic wastewater as nutrient solution, which are supplemented by appropriate additives and subjected to special biochemical culture, so as to prepare corresponding remediation flora for quick remediation of the (Cr VI) contaminated site. The remediation flora can quickly and effectively remediate Cr (VI)-containing oil on the site.

Description

technical field [0001] The invention relates to a method for preparing Cr(VI)-contaminated site restoration flora using sludge, adding appropriate amount of additives to the anaerobic sludge, and after special biochemical cultivation, the corresponding rapid repair Cr(VI) can be prepared. VI) Bacteria species for remediation of contaminated sites. The invention belongs to the technical field of environmental protection. Background technique [0002] Chromium and its compounds are commonly used basic raw materials in metallurgy, metal processing, electroplating, tanning, paint, pigment and other industries. During the production process of the above industries, a large amount of Cr(VI)-containing waste gas, waste water and waste residues are generated, resulting in serious environmental pollution. question. [0003] On the other hand, how to remediate Cr(VI)-containing soil has always been a difficult problem in the environmental protection circle. Although there are many ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12N1/00B09C1/10
Inventor 张大磊李卫华孙英杰郭皓刘琮唐沂珍
Owner 上海洁壤环保科技有限公司
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