System and method for treating high-concentration organic wastewater containing sulfate
By coupling electrochemical and biological processes, the methanogenesis and sulfate reduction processes are decoupled, and sulfides are fixed using zero-valent iron. This achieves efficient treatment of organic wastewater with high sulfate concentrations, solves the problems of microbial competition and sulfide toxicity, and improves the stability and economy of the system.
Patent Information
- Application Number
- CN202610311188.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-03-14
- Publication Date
- 2026-06-09
AI Technical Summary
Existing technologies are insufficient to efficiently and synergistically achieve the deep reduction and stabilization of methanogens and sulfates in organic wastewater containing high concentrations of sulfate. Biological methods suffer from issues of microbial competitive inhibition and sulfide toxicity, while physicochemical methods pose risks of incomplete treatment and secondary pollution.
By coupling electrochemical and biological processes, the methanogenesis/electricity generation process and the sulfate reduction/sulfur fixation process are decoupled through ion exchange membranes and external circuits. Sulfides are fixed using zero-valent iron packing material, and the efficient energy conversion of organic matter and the deep and stable removal of sulfate are achieved through an intelligent collaborative control unit.
It achieves efficient energy recovery of organic matter and deep stabilization and fixation of sulfate, improving the system's treatment efficiency, resistance to load shocks and effluent stability, reducing operating costs and realizing resource recycling.