Method for conducting bioleaching treatment on heavy metal contaminated soil through composite filamentous fungi by taking straw as carbon source

A filamentous fungus, contaminated soil technology, applied in the restoration of contaminated soil, microorganism-based methods, biochemical equipment and methods, etc., can solve the problems of high treatment cost, limited, single maximum acid production capacity, etc. The effect of low consumption and less reaction equipment
CN106190871AActive Publication Date: 2016-12-07NANJING AGRICULTURAL UNIVERSITY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NANJING AGRICULTURAL UNIVERSITY
Publication Date
2016-12-07

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Abstract

The invention discloses a filamentous fungi strain NAU-12 which is classified and named as Penicillium simplicissiumum and preserved in the China General Microbiological Culture Collection Center on June 25, 2015, and the preservation number is CGMCC NO.10990. The invention further discloses a composite filamentous fungal inoculant formed by mixing isometric Penicillium simplicissiumum NAU-12 bacterium (1*10<8> spores / mL-2*10<8> spores / mL) and aspergillus niger A80 bacterium (1*10<7> spores / mL-2*10<7> spores / mL). The invention further discloses a method for conducting bioleaching treatment on heavy metal contaminated soil through composite filamentous fungi which grow rapidly in soil, high in heavy metal resistance and capable of utilizing straw subjected to alkali-heat pretreatment as a growth carbon source and highly produce multiple small molecular organic acids. The method is adopted for treating the heavy metal contaminated soil, the removal efficiency of heavy metal is high , and the cost is low.
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Description

technical field

[0001] The invention belongs to the technical field of environmental engineering, and relates to a method for treating heavy metal-contaminated soil by bioleaching of composite filamentous fungi using straw as a carbon source. Waste straw is used as a carbon source for growth, and composite filamentous fungi (Penicillium simpleum and Aspergillus niger) that produce a variety of small molecular organic acids are an efficient and low-cost method for removing heavy metals in soil. Background technique

[0002] High-speed industrialization, urbanization and agricultural intensification have led to increasingly serious soil heavy metal pollution. According to the calculations of the Ministry of Agriculture, the area of ​​cultivated land polluted by heavy metals such as Pb, Cd, and Cu in my country has reached 10 million hectares at present, and the survey by China Environmental Monitoring Center has approached 20 million hectares, and the grain contaminated by hea...

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
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