Direct vermicomposting of fresh sewage sludge by using two epigeic earthworm species
Direct vermicomposting of fresh sewage sludge by two epigeic earthworm species (Eisenia foetida and Bimastus parvus) was conducted in a lab-scale experimental setup, and the performance was evaluated. The results showed that it was feasible to use both E. fetida and B. parvus to convert fresh sewage sludge without any pretreatment and blending into good quality fertilizer. Direct vermicomposting resulted in significant increase in nitrogen (35.38 ％ - 37.48 ％) and phosphorus (15.35 ％ - 18.96 ％), while decrease in pH (10.22 ％ - 20.82 ％), TOC (27.01 ％ - 29.18 ％) and the C/N ratio (46.91 ％ - 47.70 ％). Vermicomposting also caused significant reduction in concentration of heavy metal: Cu (35.17 ％ - 37.71 ％), Zn (29.25 ％ - 38.76 ％), Pb (21.23 ％ - 27.40 ％) and Cr (16.99 ％ - 22.96 ％) in sewage sludge. Study revealed that direct vermicomposting by epigeic earthworm species might be one promising disposal technique for fresh sewage sludge.
sewage sludge vermicomposting E. fetida B.parvus
Xuemin Chen Xiaoyong Fu
School of Environmental and Municipal Engineering Lanzhou Jiao tong University Lanzhou, China
国际会议
2010 International Conference on Digital Manufacturing and Automation(2010 数字制造与自动化国际会议 ICDMA 2010)
长沙
英文
560-563
2010-12-18（万方平台首次上网日期，不代表论文的发表时间）