Alcomycete symbiotic system and application thereof in treatment of aquaculture tail water

By optimizing the inoculation ratio and quorum sensing signal molecular regulation of the algae-bacteria symbiotic system, the problems of algae-algae competition, microbial community behavior and antibiotic stress in aquaculture wastewater treatment were solved, achieving efficient purification and stability, reducing the risk of resistance gene spread, and possessing resource recovery capabilities.

CN121948702APending Publication Date: 2026-05-01PEARL RIVER FISHERY RES INST CHINESE ACAD OF FISHERY SCI
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Patent Information

Application Number
CN202610306282.0
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-03-13
Publication Date
2026-05-01

AI Technical Summary

Technical Problem

Existing technologies for treating aquaculture wastewater suffer from problems such as algae-algae competition, algae-bacteria imbalance, microbial community behavior regulation, and system stability under antibiotic stress, resulting in low purification efficiency and a high risk of resistance gene spread.

Method used

An optimized algae-bacterial symbiotic system was adopted. By adjusting the initial dry weight ratio of Chlorella, Scenedesmus and activated sludge to 1:1:6, and by adding exogenous octanoyl-L-homoserine lactone or tetradecanoyl-L-homoserine lactone signaling molecules, the algae-bacterial interaction was regulated, the system stability and purification efficiency were improved, and the spread of antibiotic-induced resistance genes was inhibited.

Benefits of technology

It achieves efficient purification of aquaculture wastewater, complete removal of ammonia nitrogen, deep removal of total nitrogen and total phosphorus, improved system stability, enhanced stress resistance, potential for resource recovery, and reduced risk of resistance gene spread.

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Abstract

The invention discloses a phycomycete symbiotic system and application of the phycomycete symbiotic system in treatment of aquaculture tail water, and belongs to the technical field of tail water treatment. The phycomycete symbiotic system comprises chlorella, scenedesmus and activated sludge, and the initial inoculation dry weight ratio of the chlorella to the scenedesmus to the activated sludge is 1: 1: 6. And exogenously adding octanoyl-L-homoserine lactone or tetradecanoyl-L-homoserine lactone into the phycomycetes symbiotic system, so as to construct the phycomycetes symbiotic system with enhanced functions. On the basis of a mixed algae-bacteria symbiotic system with an optimized ratio, directional enhancement of functions is realized by virtue of quorum sensing signal molecules, the stability and resistance gene interception capability of the quorum sensing signal molecules under the stress of antibiotics are verified, and finally efficient purification of the aquaculture tail water is realized. According to the invention, the blank of the prior art in the aspects of advanced regulation and control of a phycomycete synergistic mechanism and synergistic treatment of emerging pollutants is filled up.
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