Anaerobic digestion of excess sludge from municipal wastewater treatment plant for biogas production
By integrating ultrasonic pretreatment, hydrothermal pretreatment, and straw micro-storage technology into a closed-loop system, the problem of low efficiency in traditional sludge anaerobic digestion technology has been solved, achieving high-efficiency biogas production and stable operation, and improving resource utilization efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- YIYANG VOCATIONAL & TECH COLLEGE
- Filing Date
- 2026-03-11
- Publication Date
- 2026-07-17
AI Technical Summary
Traditional anaerobic digestion technology for sludge suffers from long digestion cycles, low gas production rates, sludge bulking and foaming problems, and the straw resources are not fully utilized, resulting in unstable system operation and low efficiency.
An integrated ultrasonic pretreatment, hydrothermal pretreatment, and straw micro-storage technology are adopted to form a closed-loop treatment system. Through the coordinated operation of multiple modules, the efficient resource utilization of sludge and straw is realized, including a pretreatment module, a mixed acidification module, an anaerobic fermentation module, and a biogas purification module.
It significantly improved biogas production and system operational stability, improved the C/N ratio, increased the gas production rate per unit volume, achieved sludge reduction and resource utilization, and reduced energy and water consumption.