Sludge stabilization of vermifilter and analysis of influence factors
Under different operating modes, this paper studies on the sludge stabilization effect and of vermifilter in different medium, and analyzed efficiency factors of the sludge stability in filter. The results showed that after the treatment of vermifilter, the average sludge VSS/SS was smaller than 50％, the average VFA was 30-40％, and the average organism decomposition rate was up to 48-65％, so the systems whole effect was perfect. Filter medium was one of the most important factors which affect the function of sludge stabilization. Compared to silica sands, earthworms sludge digestion efficiency in ceramic pellets was higher, and the systems whole effect was better. It was mostly due to the damage to earthworms caused by filter medium. The most suitable temperature for earthworms sludge digestion efficiency was 23-28℃, and the whole effect was the best at the same condition. Since hydraulic overloading was somehow negative to earthworms normal activities and its sludge digestion efficiency, it should be less than 6.00 m/d.
vermifilter sludge stabilization factors earthworms
Min WU Ning LIU Chuanyin WEI Meiyan XING Shanjie LOU
State Key Laboratory of Pollution Control and Resources Reuse,School of Environmental Science and Engineering,Tongji University Shanghai 200092,China
国际会议
北京
英文
1-5
2009-06-11（万方平台首次上网日期，不代表论文的发表时间）