Method for preparing ecological remediation soil by using microbial remediation of contaminated spoil

By combining microbial remediation and compound fertilizer, the tunnel boring machine excavated soil was improved, solving the problems of insufficient nutrients and pollutant treatment. This enabled the preparation and resource utilization of soil for ecological restoration, improving soil quality and plant growth.

CN119819706BActive Publication Date: 2026-06-16INST OF ROCK & SOIL MECHANICS CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
INST OF ROCK & SOIL MECHANICS CHINESE ACAD OF SCI
Filing Date
2024-12-25
Publication Date
2026-06-16

AI Technical Summary

⚠Technical Problem

Tunnel boring machine (TBM) slag has problems such as insufficient nutrient content, low soil biological activity, and unstable physicochemical properties. Existing disposal methods cannot effectively address its environmental pollution and resource utilization.

⚗Method used

A microbial remediation method is used to prepare ecological remediation soil by mixing modified biochar materials with specific microbial inoculum and combining them with compound fertilizers, thereby improving the degradation of pollutants and the soil structure of tunnel boring machine excavation soil.

🎯Benefits of technology

This approach enables the resource utilization of tunnel boring machine (TBM) slag, reduces the bioavailability and mobility of pollutants, improves soil structure and nutrient supply, and promotes plant growth and ecological restoration.

✦ Generated by Eureka AI based on patent content.

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Abstract

The application discloses a method for preparing ecological restoration soil by repairing contaminated spoil through regeneration, and comprises the following steps: mixing dry straw powder and bimetallic alkali liquor, stirring and drying, pyrolyzing under a protective atmosphere at a temperature above 500 DEG C to obtain modified biochar material; mixing the modified biochar material with microbial liquid, oscillating and adsorbing, and freeze-drying to obtain carbon-based biological composite material; mixing the carbon-based biological composite material with shield spoil to obtain improved shield spoil; and mixing the improved shield spoil with organic fertilizer to obtain ecological restoration soil; the method removes toxic and harmful components in the shield spoil through biodegradation, the modified biochar improves the structure of the shield spoil, and the specific component compound fertilizer is used, so that the shield spoil is recycled, and the shield spoil-based ecological restoration soil is obtained.
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