Microorganism-plant combined mineralized refuse remediation method and system

Abstract

The invention belongs to the field of refuse treatment, and particularly discloses a microorganism-plant combined mineralized refuse remediation method and system. The microorganism-plant combined mineralized refuse remediation method comprises the following steps: S1, excavating and screening a refuse landfill to obtain mineralized refuse polluted by heavy metals, and placing the mineralized refuse in an infiltrating irrigation device; S2, sequentially injecting a bacillus pasteurii liquid and a reaction liquid into the infiltrating irrigation device; S3, repeating the S2 multiple times to fully remediate heavy metals in the refuse by the bacillus pasteurii; and S4, taking out the mineralized refuse and transferring the mineralized refuse into a closed greening land, planting plants in the closed greening land, and removing the plants after a certain period of time, thus completing remediation of the mineralized refuse. According to the method, microbial remediation technology and plant remediation technology are combined for remediation treatment of heavy metals in the mineralized refuse, the adopted equipment is simple, the operation is easy and convenient, the effect is remarkable, the cost is low, and resource utilization of the mineralized refuse is achieved.

Description

technical field [0001] The invention belongs to the field of garbage treatment, and more specifically relates to a microorganism-plant combined mineralized garbage restoration method and system. Background technique [0002] my country's urban domestic waste mainly relies on sanitary landfills for disposal. Landfills take a long time to fill and occupy a large area. With the continuous increase in waste production, the area of ​​landfills will continue to expand, and the expansion of urban areas will also increase land use. The cost is increasing day by day, so it is imminent to realize the sustainability of sanitary landfills and the utilization of waste resources. [0003] The municipal solid waste in the landfill site has been degraded for many years and the fine particles obtained by sieving to reach a stable state are mineralized waste. The content of nitrogen, phosphorus and organic matter in mineralized waste is higher than that of ordinary soil, and it has good physi...

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Problems solved by technology

The chemical leaching method refers to selecting a suitable eluent to clean the polluted and mineralized garbage to achieve the purpose of removing heavy metals. However, this technology has high requirements on soil texture, which is not applicable in many places in my country, and the eluent will cause secondary pollution. Pollution; the stable solidification restoration method uses passivators such as lime, power plant ash, iron and manganese oxides to reduce the migration of heavy metals, but the passivated heavy metals remaining in the soil may still cause secondary pollution after several years

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