造纸制浆废水厌氧处理的方法及应用
By controlling the silica content in papermaking and pulping wastewater and employing treatment steps such as flocculation and filtration, the negative impact of sodium silicate on anaerobic granular sludge was resolved, sludge activity and methane yield were improved, and wastewater treatment efficiency was enhanced.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- YUEYANG TIANHE ENVIRONMENTAL PROTECTION TECH CO LTD
- Filing Date
- 2024-11-15
- Publication Date
- 2026-07-17
AI Technical Summary
High sodium silicate content in papermaking and pulping wastewater leads to decreased activity of anaerobic granular sludge, prevents biogas from escaping, reduces granular sludge density, causes poor settling performance, and even breaks into fragments, affecting wastewater treatment efficiency.
By controlling the silica content in the wastewater to below 80 mg/L, and employing treatment steps such as flocculation, filtration, and pH adjustment, the impact of sodium silicate on anaerobic granular sludge is reduced. Flocculants, coagulants, and activated carbon are added to improve sludge activity.
It significantly improves the activity of anaerobic granular sludge, with clear and full granules that do not stick together, thereby increasing methane yield and wastewater treatment efficiency.
Smart Images
Figure CN119263484B_ABST