Biostabilization of Tannery Sludge Compost by Vermicomposting

The aim of this study is to investigate the stabilization tannery sludge compost mixed with cow manure at different ratios by employing an epigeic earthworm Eisenia foetida and bioaccumulation chromium in earthworms. Organic (M) (S) were certain proportions, moistened worms added. Mixing realized as 100% M (M100S0), 70% + 30% S (M70S30), 50% (M50S50) (M30S70). experiment was carried out a constant temperature 24 oC dark environment according randomized plot design three replicates. ended after 120 days following parameters evaluated vermicomposts: pH, electrical conductivity (EC), total nitrogen (TN), organic carbon (TOC), C:N ratio, macro micro elements. In addition, it determined chromium, Cr (VI) vermicomposts E. body. results for TOC, ratio showed decreases their values end vermicomposting process, whereas EC, TON, Ca Mg increase, indicating that reached maturity level. All below detectable During reduction rates amounts 96% (M30S70), respectively. While highest amount body M30S70 treatment, element decreased due decreasing doses compost. These show can bioacumulate As result, be alternate technology recycling environmentally safe disposal/management using foetida.