Method for enhancing biological floc denitrification efficiency of low-carbon aquaculture tail water by using c8-hsl

By utilizing C8-HSL signaling molecules to regulate the microbial quorum sensing system of bioflocs under low-carbon conditions, the problems of low denitrification efficiency and high carbon source consumption under low-carbon conditions were solved, achieving efficient and economical biofloc denitrification and avoiding secondary pollution.

CN122187262APending Publication Date: 2026-06-12SOUTH CHINA UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SOUTH CHINA UNIV OF TECH
Filing Date
2026-04-15
Publication Date
2026-06-12

AI Technical Summary

⚠Technical Problem

Existing biofloc technology has low nitrogen removal efficiency, high carbon source consumption, high operating costs, and risks of secondary pollution under low-carbon conditions, and lacks precise control methods.

⚗Method used

By utilizing the exogenous signaling molecule N-octanoyl-L-homoserine lactone (C8-HSL), the quorum sensing system of microorganisms in bioflocs was regulated under low-carbon conditions. The denitrification efficiency was enhanced by adding C8-HSL signaling molecules without relying on a high carbon-nitrogen ratio, thus constructing a low-carbon biofloc reaction system.

🎯Benefits of technology

It significantly improves nitrogen removal efficiency under low-carbon conditions, reduces carbon source consumption, avoids secondary pollution, saves operating costs, and enhances microbial nitrogen removal function through a multi-dimensional synergistic regulation mechanism.

✦ Generated by Eureka AI based on patent content.

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Abstract

The application discloses a method for strengthening the denitrification efficiency of biological floc in low-carbon aquaculture tail water by using C8-HSL, which comprises the following steps: constructing a low-carbon biological floc reaction system, inoculating the biological floc and injecting the aquaculture tail water to be treated into the system, and controlling the carbon-nitrogen ratio of the system to be lower than a high-carbon operation threshold; adding N-acyl homoserine lactone signal molecules into the system; and operating the system under the condition of aeration, so as to strengthen the removal efficiency of total nitrogen in the tail water by using the regulation effect of the signal molecules on the microorganisms in the biological floc. By adding trace signal molecules, the denitrification efficiency of the biological floc system is significantly improved under the condition of low carbon, the amount of added external carbon source is greatly reduced, the operation cost is saved, the risk of secondary pollution is avoided, the method has the advantages of simple operation and easy popularization, and is suitable for upgrading and reconstruction of existing aquaculture tail water treatment facilities.
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