Micro-electric field stimulation coupling anaerobic membrane distillation reactor and method for intensifying methane production thereof

By introducing micro-electric field stimulation into the anaerobic membrane distillation reactor, the problem of inhibited methanogenic bacteria activity in the treatment of high-salt and high-ammonia-nitrogen wastewater was solved, achieving efficient methane generation and stable operation, and improving the system's resistance to shock loads and metabolic recovery capabilities.

CN122444323AActive Publication Date: 2026-07-24GUANGZHOU UNIVERSITY
4 Cites 0 Cited by

Patent Information

Application Number
CN202610913858.X
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-06-24
Publication Date
2026-07-24
Estimated Expiration
2046-06-24

AI Technical Summary

Technical Problem

Existing anaerobic membrane distillation bioreactors suffer from problems such as inhibited methanogenic bacteria activity, accumulation of volatile fatty acids, and low energy recovery efficiency when treating complex saline organic wastewater containing high salt, high ammonia nitrogen, and recalcitrant organic matter. As a result, they are unable to maintain high methane generation performance under long-term stable operation and high-salt conditions.

Method used

A micro-electric field-coupled anaerobic membrane distillation reactor is adopted. By setting up a composite anode and a carbon brush cathode in the anaerobic reaction vessel, a micro-electric field of 0.3~0.8V is applied. Combined with membrane distillation components, a temperature control unit, and a stirring unit, interspecies electron transfer is enhanced, thereby improving the activity of methanogenic bacteria and the methane recovery capacity.

Benefits of technology

It significantly improves gas production efficiency and methane recovery capacity, enhances the system's tolerance to high salt and high ammonia nitrogen shocks, ensures the stability of long-term continuous operation and rapid recovery of metabolic function, and increases methane yield by about 40% under complex operating conditions.

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

Abstract

The invention discloses a micro-electric field stimulation coupled anaerobic membrane distillation reactor and a method for intensifying methane production thereof, and belongs to the technical field of wastewater treatment and resource utilization. The reactor comprises an anaerobic reaction tank body, a micro electric field stimulation unit, a membrane distillation assembly, a temperature control unit, a water inlet unit, a condensation collection unit, a vacuum pump and a biogas collection unit, the micro electric field stimulation unit is composed of a composite anode, a carbon brush cathode and an external direct current power supply, and a 0.3-0.8 V micro electric field is applied. The method comprises the following steps: inoculating anaerobic sludge, adding kitchen wastewater and / or landfill leachate, starting membrane distillation at 45-65 DEG C and applying a micro electric field, increasing the proportion of the landfill leachate in stages, collecting biogas and monitoring the methane content. The low-voltage micro electric field is used for promoting interspecific electron transfer, the methane yield exceeds 340 mL / gCOD when the ratio of kitchen wastewater to landfill leachate is 1: 1, the methane yield is increased by about 40% compared with the contrast, and the impact load resistance and metabolism recovery capacity of the system are enhanced.
Need to check novelty before this filing date? Find Prior Art