Method for degrading heavy metals in sludge by using extreme microorganisms, product and application

An extremophile and heavy metal technology, applied in the field of microbial engineering, can solve problems such as environmental secondary pollution and resource utilization problems, and achieve the effects of improving soil fertility, restoring and protecting soil ecology, and improving soil physical and chemical properties and biological activity

Pending Publication Date: 2020-09-22
北京泽云东方碳汇科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the sludge contains many harmful substances such as pathogenic microorganisms, organic pollutants and various heavy metals,

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] A method for degrading heavy metals in sludge by extremophiles, comprising the following steps:

[0050] (1) Cultivation of extreme flora and fermentation flora: first screen and isolate the flora, and then use CMC to identify the culture medium and separate them from heavy metal industrial pollution areas. Cellulose can be produced at low temperature, room temperature, high temperature or extreme environments above 100°C Enzyme fungi and bacteria, the strains were inoculated in two kinds of straw disintegration media with different nitrogen sources, and cultured at 0-15°C, 15-40°C, 45-75°C and extreme environments for 58h, 65h, 80h, 90h, measure the size of the hydrolysis zone of the strain; select the strains with a hydrolysis zone larger than 1.5cm in each environmental range as low-temperature active bacteria, room temperature active bacteria, thermophilic strains and extreme bacteria; the four groups of bacteria were cultured separately in the culture medium , cult...

Embodiment 2

[0057] A method for degrading heavy metals in sludge by extremophiles, comprising the following steps:

[0058] (1) Cultivation of extreme flora and fermentation flora: first screen and isolate the flora, and use CMC to identify the culture medium and separate them from heavy metal industrial pollution areas. Fiber can be produced in extreme environments of low temperature, room temperature, high temperature or 20% salinity The fungus and bacteria of suzyme were inoculated in two kinds of straw disintegration media with different nitrogen sources, and cultured at 0-15°C, 15-40°C, 45-75°C and extreme environments for 48h, 96h, and 55h respectively , 90h, measure the size of the hydrolysis zone of the strain; select the strains with a hydrolysis zone greater than 1.5cm in each environmental range as low-temperature active bacteria, room temperature active bacteria, thermophilic strains and extreme bacterial groups; the four groups of bacteria were separately carried out in the cu...

Embodiment 3

[0065] A method for degrading heavy metals in sludge by extremophiles, comprising the following steps:

[0066] (1) Cultivation of extreme flora and fermentation flora: first screen and isolate the flora, and use CMC to identify the culture medium and separate them from heavy metal industrial pollution areas. Cellulose can be produced in extreme environments such as low temperature, room temperature, high temperature or pH<2 Enzyme fungi and bacteria, the strains were inoculated in two straw disintegration media with different nitrogen sources, and cultured at 0-15°C, 15-40°C, 45-75°C and extreme environments for 60h, 48h, 96h, 50h, measure the size of the strain's hydrolysis circle; select the strains with a hydrolysis circle greater than 1.5cm in each environmental range as low-temperature active bacteria, room temperature active bacteria, thermophilic strains and extreme bacteria; the four groups of bacteria were cultured separately in the culture medium , cultivated to the...

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PUM

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Abstract

The invention discloses a method for degrading heavy metals in sludge by extreme microorganisms, a product and application, and belongs to the field of microbial engineering. The method comprises steps of culture and combination of flora, relay type continuous fermentation after mixing of organic solid wastes and sludge, and formation of a pollution-free and environment-friendly fermentation product at last. The extreme microorganisms adopted by the method cooperate with organic matter microorganisms for decomposing sludge in the process of degrading heavy metals in the sludge; uniformly mixing of organic solid waste and the sludge according to a proper C/N ratio is carried out, and then relay type continuous fermentation is carried out; finally, a fermentation product which is odorless and has the heavy metal content under the limit standard is obtained. The fermentation product can be used for producing an organic fertilizer with higher organic matter content, and has the advantagesof improving the physical and chemical properties and biological activity of soil, improving the soil fertility and restoring and protecting the soil ecology; by utilizing the special affinity and efficient passivation and degradation functions of the extreme microorganisms on heavy metals, the sludge is turned into wealth, and the purpose of resource utilization of the sludge is achieved.

Description

technical field [0001] The invention relates to the technical field of microbial engineering, in particular to a method, product and application for degrading heavy metals in sludge by extremophiles. Background technique [0002] Sludge is a solid sediment produced during the treatment of domestic and aquaculture sewage and industrial wastewater. Its hazards mainly include organic pollution, heavy metal pollution, pathogenic microorganism pollution and other pollution, which together constitute environmental pollution. With its discharge increasing year by year, the treatment of sludge is also a major problem facing society today. Since sludge contains a large amount of organic matter and nitrogen, phosphorus and other essential nutrients for plants, resource utilization has become an effective way to treat manure and sludge. However, since sludge contains many harmful substances such as pathogenic microorganisms, organic pollutants and various heavy metals, it is easy to c...

Claims

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Application Information

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IPC IPC(8): C02F11/04C05F17/20C05G3/80C05G5/12C02F101/20
CPCC02F11/04C05F3/00C05F17/20C05G3/80C05G5/12C02F2101/20C02F2301/10C02F2305/06C05F7/00C05F11/00C05F11/08Y02W30/40
Inventor 张森林史洋沈济陶泓宇冯泽娟
Owner 北京泽云东方碳汇科技有限公司
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