Electrochemically enhanced anaerobic-ammonium-oxidation membrane bioreactor based on conductive separation membrane, and biological nitrogen-removal method using same

By using conductive separation membrane and electrochemical strengthening technology in the anaerobic ammonia oxide film bioreactor, the problems of enrichment and low activity of anaerobic ammonia oxidation bacteria in traditional processes are solved, efficient nitrogen removal and membrane pollution relief are achieved, and large-scale application of the process is promoted.

WO2025102561A1 Publication Date: 2025-05-22DALIAN UNIV OF TECH
9 Cites 1 Cited by

Patent Information

Application Number
PCT/CN2024/081341
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Priority Date
2023-11-17
Filing Date
2024-03-13
Publication Date
2025-05-22

AI Technical Summary

Technical Problem

The traditional nitration and denitrification biological denitrification process has high operating costs, and the anaerobic ammonia oxidation bacteria are difficult to enrich and have low biological activity, resulting in long process start-up time and difficulty in stable operation, hindering the large-scale application of this process.

Method used

The electrochemically strengthened anaerobic ammonia oxidation film bioreactor based on a conductive separation membrane is used, and the conductive membrane module is used as the cathode and carbon material or metal material as the anode. Under the action of applied voltage, microorganisms are intercepted, membrane pollution is alleviated, and the enrichment and activity of anaerobic ammonia oxidation bacteria are strengthened.

Benefits of technology

The effective enrichment and activity enhancement of anaerobic ammonia oxidizing bacteria has been achieved, the nitrogen removal effect has been improved, the membrane pollution problem has been alleviated, the operating cost has been reduced, the operation has been simplified, and the promotion and application of the process has been promoted.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

Disclosed in the present invention are an electrochemically enhanced anaerobic-ammonium-oxidation membrane bioreactor based on a conductive separation membrane, and a biological nitrogen-removal method using same. The membrane bioreactor comprises a reactor shell, an anode, a cathode, a direct-current power supply, a water intake line and a water output line, wherein anaerobic-ammonium-oxidation bacteria are loaded into the reactor shell, and a water inlet is provided at the bottom of the reactor shell and is connected to the water intake line; the anode and the cathode are located in the reactor shell; a positive electrode of the direct-current power supply is connected to the anode, and a negative electrode of the direct-current power supply is connected to the cathode; and the cathode is a conductive membrane assembly, and a water outlet is provided at the top of the conductive membrane assembly and is connected to the water output line. In the present invention, a membrane biological treatment is coupled with an electrochemical technique, such that anaerobic-ammonium-oxidation bacteria can be effectively retained and enriched, the nitrogen-removal effect of the anaerobic-ammonium-oxidation bacteria is enhanced, and membrane fouling is alleviated by means of electrostatic repulsion. The device has a good nitrogen-removal performance, effectively alleviates membrane fouling, is easily operated and has broad application prospects.
Need to check novelty before this filing date? Find Prior Art