Soil microbial remediation agent collecting, amplifying and recycling integrated device and method

Abstract

The invention provides a soil microbial remediation agent collecting, amplifying and recycling integrated device and a method. The device comprises a water supplementing unit, a liquid adding unit and a recycling unit, the liquid adding unit comprises a fermentation tank and a liquid adding pump, and petroleum pollutant gas generated in the soil remediation process is used for circularly culturing a microbial remediation agent in the fermentation tank; the water supplementing unit comprises a water supplementing pipeline, the downstream end of the water supplementing pipeline is connected with the fermentation tank of the liquid adding unit, and to-be-treated petroleum-contaminated soil; the recycling unit comprises a collecting pore plate and a self-priming pump, and the collecting pore plate is placed in a waste liquid collecting pit formed in the petroleum-contaminated soil to be treated, so that waste liquid flows into the waste liquid collecting pit in a centralized manner; the upstream end of the self-priming pump is connected with the waste liquid collecting pit and the downstream end of the self-priming pump is connected with the fermentation tank. The device is suitable for ex-situ remediation of petroleum-contaminated soil, and the three functions of microbial remediation agent injection, water replenishing and leachate recycling in the soil remediation process can be integrated through the soil remediation agent.

Description

technical field [0001] The invention belongs to the technical field of environmental engineering, and in particular relates to an integrated device and method for collecting, amplifying, and recycling an oil-contaminated soil microbial remediation agent. Background technique [0002] In recent years, the state has continuously strengthened the protection of soil and groundwater. With the rise of soil remediation technology, ex-situ remediation technology has become very popular, and it is one of the green oil-contaminated soil remediation technologies recognized at home and abroad. In the ex-situ remediation technology, dosing to the contaminated soil improves the internal micro-flow field, improves the bioavailability of pollutants, promotes the biodegradation process of petroleum microorganisms, and greatly improves the oil removal effect of microorganisms. [0003] However, the existing technology of dosing contaminated soil can only inject microbial remediation agents i...

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Problems solved by technology

[0003]However, the existing technology of dosing contaminated soil can only inject microbial remediation agent into the contaminated soil in one direction, and cannot precisely control the injection amount, which can easily cause microbial Excessive injection of remediation agent will not only waste the microbial remediation agent and increase the cost, but also lead to the accumulation of microbial remediation agent at the bottom of the soil, resulting in a humid environment, affecting the microbial degradation process, and not conducive to the treatment of contaminated soil

The waste liquid in the process of soil remediation caused secondary pollution

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