Microalgae bioremediation agent and preparation method thereof

By loading microalgae bio-soil remediation agents onto porous active carriers formed by modification on montmorillonite, the problem of insufficient activity of microalgae in soil is solved, achieving long-term activity and effective remediation under different environments, improving soil structure and microbial communities, and increasing crop yield and quality.

CN120682822BActive Publication Date: 2025-12-12GUANGZHOU YUANQI FARMLAND BIOTECHNOLOGY CO LTD
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Patent Information

Application Number
CN202510769234.0
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2025-06-10
Publication Date
2025-12-12
Estimated Expiration
2045-06-10

AI Technical Summary

Technical Problem

In existing technologies, microalgae become inactive during soil remediation, especially in deep soil, due to a lack of light and energy. They cannot maintain their activity for long periods and are also difficult to survive in the high-temperature environment of the surface. As a result, the bioremediation effect of microalgae is poor and cannot form a sustainable and benign underground micro-ecosystem.

Method used

The method of loading microalgae onto porous active carriers involves modifying silica composites onto montmorillonite to form a positively charged porous carrier, and then loading chitosan cations to form a microalgae-based soil remediation agent that can survive in different pH environments. By combining heterotrophic and fasciotrophic growth modes, the activity of microalgae in the soil is ensured.

Benefits of technology

Maintaining the activity of microalgae under different soil conditions forms a sustainable and benign underground micro-ecosystem, improves soil aggregate structure, increases soil oxygen content and organic matter, promotes the growth of beneficial microorganisms, and improves crop yield and quality.

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Abstract

The application belongs to the technical field of soil remediation, and discloses a microalgae biological soil remediation agent and application thereof.A sustainable benign underground micro-ecosystem is constructed, and the prepared microalgae biological soil remediation agent takes a porous active carrier with positive charges as a matrix.The porous active carrier is obtained by compounding silicon dioxide on montmorillonite, and the porous active carrier is modified to obtain an amine group of a negative charge NH2 ‑ between layers, and finally loaded with chitosan cations to become a porous active carrier with positive charges, which is loaded with a large amount of Chlorella pyrenoidosa with reduced environmental sensitivity, so that it can survive and reproduce in harsh soil environments, can significantly improve soil fertility, improve crop yield and quality, and also has the effect of reducing soil heavy metal pollution; can also increase the diversity of soil microbial communities, improve soil aggregate structure, and improve the soil physical and chemical environment.
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