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A kind of mixed bacteria agent for removing heavy metals in industrial wastewater sludge and its application

A technology for mixing bacterial agents and industrial wastewater, applied in water/sludge/sewage treatment, water pollutants, biological sludge treatment, etc., can solve the problems of poor removal effect and long biological leaching time, etc. The effect of speeding up the acidification of sludge, promoting the conversion of organic matter, and improving the leaching efficiency

Active Publication Date: 2020-03-03
铁汉山艺环境建设有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the removal effect of this method on other heavy metals such as Cd, Hg, Cr, and Pd is not good, and the bioleaching time is relatively long. Therefore, it is necessary to study a mixed bacterial agent to enhance the removal of heavy metals in industrial wastewater sludge. Effect

Method used

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  • A kind of mixed bacteria agent for removing heavy metals in industrial wastewater sludge and its application
  • A kind of mixed bacteria agent for removing heavy metals in industrial wastewater sludge and its application

Examples

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Effect test

Embodiment 1

[0019] A mixed bacterial agent for removing heavy metals in industrial wastewater sludge, comprising the following components: Thiobacillus thiooxidans, Thiobacillus ferrooxidans, aerobic denitrifying bacteria, heavy metal-resistant bacteria and extreme acidophilic Thiobacillus acidophilus.

[0020] The heavy metal-resistant bacterium is Pseudomonas aeruginosa ZGKD2 disclosed in Chinese invention patent CN102337229A.

[0021] The extreme acidophilic thiobacterium is acidophilic thiobacterium genus ZJJN disclosed in Chinese invention patent CN103131650A.

[0022] In the mixed bacterial agent, the weight ratio of Thiobacillus thiooxidans, Thiobacillus ferrooxidans, aerobic denitrifying bacteria, heavy metal-resistant bacteria and extreme acidophilic Thiobacillus is 3.5:8:6:1.5:3.

[0023] Preferably, the input amount of the mixed bacterial agent in the industrial wastewater sludge is 0.15%.

[0024] Preferably, the application method of the mixed bacterial agent comprises the f...

Embodiment 2

[0031] A mixed bacterial agent for removing heavy metals in industrial wastewater sludge, comprising the following components: Thiobacillus thiooxidans, Thiobacillus ferrooxidans, aerobic denitrifying bacteria, heavy metal-resistant bacteria and extreme acidophilic Thiobacillus acidophilus.

[0032] The heavy metal-resistant bacterium is Pseudomonas aeruginosa ZGKD2 disclosed in Chinese invention patent CN102337229A.

[0033] The extreme acidophilic thiobacterium is acidophilic thiobacterium genus ZJJN disclosed in Chinese invention patent CN103131650A.

[0034] In the mixed bacterial agent, the weight ratio of Thiobacillus thiooxidans, Thiobacillus ferrooxidans, aerobic denitrifying bacteria, heavy metal-resistant bacteria and extreme acidophilic Thiobacillus is 5:6:10:1:5.

[0035] The input amount of the mixed bacterial agent in the industrial wastewater sludge is 0.05%.

[0036] The application method of described mixed bacterial agent, comprises the following steps:

[...

Embodiment 3

[0043] A mixed bacterial agent for removing heavy metals in industrial wastewater sludge, comprising the following components: Thiobacillus thiooxidans, Thiobacillus ferrooxidans, aerobic denitrifying bacteria, heavy metal-resistant bacteria and extreme acidophilic Thiobacillus acidophilus.

[0044] The heavy metal-resistant bacterium is Pseudomonas aeruginosa ZGKD2 disclosed in Chinese invention patent CN102337229A.

[0045] The extreme acidophilic thiobacterium is acidophilic thiobacterium genus ZJJN disclosed in Chinese invention patent CN103131650A.

[0046] In the mixed bacterial agent, the weight ratio of Thiobacillus thiooxidans, Thiobacillus ferrooxidans, aerobic denitrifying bacteria, heavy metal-resistant bacteria and extreme acidophilic Thiobacillus is 3:10:4:2:2.

[0047] The input amount of the mixed bacterial agent in the industrial wastewater sludge is 0.2%.

[0048] The application method of described mixed bacterial agent, comprises the following steps:

[0...

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Abstract

The invention discloses a mixed microbial agent used for removing heavy metal in industrial wastewater sludge. The mixed microbial agent has the advantages that the mixed microbial agent comprises thiobacillus thiooxidans, thiobacillus ferrooxidans, aerobic denitrifier, heavy-metal-resistant bacteria and extremely-acidophilic thiobacillus, the aerobic denitrifier is used for directly converting ammonium nitrogen into a gaseous product under an aerobic condition and has effects of promoting organic matter conversion and accelerating sludge acidification; the heavy-metal-resistant bacteria are used for increasing the heavy metal tolerance of other bacteria; the extremely-acidophilic thiobacillus is used for evidently increasing the leaching efficiency of the heavy metal in a solution under astrong acid condition and shortening the leaching time of the heavy metal. Compared with a traditional method, a method using the mixed microbial agent has the advantages that the removing effect ofthe heavy metal such as Cu, Cd, Hg, Cr and Pd in the sludge is improved evidently, and the removing efficiency is increased evidently.

Description

technical field [0001] The invention relates to the field, in particular to a mixed bacterial agent for removing heavy metals in industrial wastewater sludge and its application. Background technique [0002] There are many kinds of heavy metals in sludge, mainly Cu, Pb, Zn, Ni, Cr, Hg and Cd, etc., which are the main obstacles to the utilization of sludge resources. The sludge mainly produced by treating domestic sewage usually has low heavy metal content, while the sludge produced mainly by treating industrial sewage often has high heavy metal content. Due to the characteristics of difficult migration, easy enrichment and great harm of heavy metals, it has become the most important factor restricting the agricultural utilization of sludge. Whether it is municipal sludge or industrial sludge, since most of them contain toxic heavy metal elements, if they are not treated properly, they will cause serious harm to the ecological environment of sewage treatment plants and even...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12N1/20C12N1/36C02F11/02C02F101/20C12R1/01C12R1/385
CPCC02F11/02C02F2101/20C12N1/20C12N1/36
Inventor 李运国赖惠银王磊邱钰媛刘芳明
Owner 铁汉山艺环境建设有限公司
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