Method for enhancing microbial degradation of volatile refractory compound wastewater by using tubular biofilm electrode

By constructing a micro-aerobic environment using tubular biomembrane electrodes, oxygen generated by electrocatalytic oxygen evolution is directly transferred to the biomembrane, solving the problems of low oxygen mass transfer efficiency and high energy consumption in existing technologies, and achieving efficient degradation of volatile organic compounds.

CN119954293BActive Publication Date: 2026-06-09NANJING UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
NANJING UNIV OF SCI & TECH
Filing Date
2025-01-17
Publication Date
2026-06-09

AI Technical Summary

Technical Problem

Existing technologies for treating volatile organic compound wastewater suffer from high energy consumption, significant gas loss, gas volatilization pollution, and low oxygen mass transfer efficiency. In particular, the insufficient contact of pollutants with plate electrodes and the low oxygen mass transfer efficiency lead to inadequate degradation efficiency.

Method used

A tubular biofilm electrode is used, and the oxygen generated by electrocatalytic oxygen evolution directly passes through the biofilm loaded on the anode surface to form a micro-aerobic environment. Combined with the water inlet seepage method at the top of the anode, it promotes full contact between pollutants and microorganisms, constructs an aerobic-anoxic-anaerobic microenvironment, and improves oxygen mass transfer efficiency and pollutant degradation efficiency.

Benefits of technology

It improves oxygen utilization and pollutant degradation efficiency, reduces energy consumption and gas pollution, enhances the system's resistance to shock loads, and achieves efficient degradation of volatile compounds.

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Abstract

This invention discloses a method for enhancing the microbial degradation of volatile and recalcitrant compounds in wastewater using a tubular biofilm electrode. The method includes: preparing a highly biocompatible tubular oxygen-evolving electrode and placing it in a reactor chamber; wastewater entering the reactor from the top of the tubular electrode; and applying an external voltage to reach the oxygen evolution potential, thereby constructing a micro-aerobic biofilm to enhance the degradation of volatile and recalcitrant compounds. This invention introduces a tubular biofilm electrode into the microbial system to create a micro-aerobic environment, effectively improving the organism's ability to resist external environmental fluctuations and promoting the long-term stability of the biological system. Under optimal operating conditions, the removal rate of volatile and recalcitrant compounds in wastewater can reach over 98%. The method of this invention is low-cost, highly efficient, and simple, reducing the high energy consumption of conventional mechanical aeration and minimizing the volatilization of organic pollutants.
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