Method for recycling nitrate radicals by treating high-salinity wastewater through electroactive microorganisms

The electroactive microbial treatment method monitored by three-electrode single chamber and multi-channel potentiostat solves the problems of high-saltitude nitrate wastewater with low removal efficiency, and achieves efficient nitrate removal and ammonia recovery, reducing the treatment cost and the risk of microbial inhibition.

CN120398247APending Publication Date: 2025-08-01GUANGZHOU UNIVERSITY
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Patent Information

Application Number
CN202510783747.7
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-06-12
Publication Date
2025-08-01

AI Technical Summary

Technical Problem

When treating high salinity nitrate wastewater, the prior art has problems such as high energy consumption and inhibition of microbial activity, making it difficult to achieve efficient nitrate removal and ammonia recovery.

Method used

A three-electrode single chamber and multi-channel potentiostat combined with a programmable logic master control system is used to treat high-salt wastewater through electroactive microorganisms, and nitrate is converted into ammonium nitrogen by denitrification, and the reaction progress is monitored through a multi-channel potentiostat to achieve efficient removal of nitrate and resource recovery.

Benefits of technology

Under high salinity conditions, the nitrate removal rate of more than 99% is achieved, energy consumption is reduced, microbial inactivation is avoided, and nitrogen resource recycling and pollution load are reduced.

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Abstract

The invention belongs to the technical field of sewage treatment, and particularly discloses a method for recycling nitrate radicals by treating high-salinity wastewater through electroactive microorganisms, a microbial electrolysis cell three-electrode single-chamber system is adopted, high-salinity wastewater is used for domesticating and culturing a biological membrane, and the biological membrane has a good nitrate removal effect on nitrate wastewater with the salinity of 1%-3% and can be used for recycling nitrate radicals. For nitrate wastewater with the salinity of 1%-2%, nitrogen can be partially recovered in the form of ammonia, the defect that energy consumption is high when ammonia nitrogen resources are recovered from nitrate wastewater is overcome, the high nitrate removal rate is guaranteed, and meanwhile the defect that nitrate is difficult to recover from high-salinity wastewater is overcome.
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