A method and apparatus for treating a microbial-induced solidification of a poor filler

By using a microbial-induced solidification method, a composite bacterial solution was prepared using heavy metal immobilization strains and microbial solidification strains. This solution was combined with a dual-channel grouting structure to treat defective fillers, solving the problems of high energy consumption, environmental risks, and pollution control in the treatment of defective fillers. This approach achieved simultaneous improvement in heavy metal immobilization and mechanical properties, as well as the safe transformation of pollutants.

CN122128945APending Publication Date: 2026-06-02中建五局第三建设有限公司 +2
View PDF 6 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
中建五局第三建设有限公司
Filing Date
2026-04-30
Publication Date
2026-06-02

AI Technical Summary

Technical Problem

Existing physical reinforcement and chemical solidification methods have problems such as high energy consumption, high material consumption, environmental risks, poor adaptability and difficulty in controlling pollution in the treatment of defective fillers. Traditional microbial-induced calcium carbonate precipitation technology lacks portability and pollution control capabilities.

Method used

A microbial-induced solidification method was adopted, which prepared a composite bacterial solution and a cementing solution by obtaining heavy metal immobilization strains and microbial solidification strains. A dual-channel grouting structure was used to treat the surface and deep layers simultaneously, forming a microbial-solidification composite barrier layer, thereby achieving heavy metal immobilization and mechanical property improvement.

Benefits of technology

It achieves long-term fixation of heavy metals and simultaneous improvement of mechanical properties, forming a four-step synergistic treatment system of "activation-colonization-solidification-sealing", reducing stratum disturbance, establishing a sustainable development model of pollution control-ecological restoration-resource recycling, and significantly reducing the leaching toxicity, compressive strength, and permeability of the treated solidified body.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN122128945A_ABST
    Figure CN122128945A_ABST
Patent Text Reader

Abstract

This invention provides a method and apparatus for treating defective fillers that have undergone microbial-induced solidification. The method includes: obtaining heavy metal immobilization bacteria; preparing a composite bacterial solution, a composite cementing solution, and a chelating activation solution; pretreating the defective filler; and simultaneously treating the surface and deep layers of the defective filler. After drilling a hollow spiral grouting pipe to the target depth, a dual-channel grouting structure is connected. The dual-channel grouting structure is connected to a surface spraying plate. The chelating activation solution, composite bacterial solution, and composite cementing solution are sequentially injected into the dual-channel grouting structure, allowing the injected liquid to be simultaneously sprayed from the surface spraying plate onto the surface of the defective filler and injected into the deep layer of the defective filler from the hollow spiral grouting pipe, achieving simultaneous treatment of the surface and deep layers. This invention can induce the generation of a microbial-solidified composite barrier layer through functional bacterial agents, achieving long-term heavy metal immobilization and simultaneous improvement of mechanical properties.
Need to check novelty before this filing date? Find Prior Art