Time filter

Source Type

Kumar R.,Ds College Dr Bra University | Shweta,Ds College Dr Bra University
Journal of Environmental Science and Technology | Year: 2011

Earthworm promises to provide cheaper solutions to several social, economic and environmental problems plaguing the human society. Their body work as hio-filter' and they can 'purify' and also 'disinfect' and 'detoxify' the solid wastes. They are both protective and productive for environment and society. The microbiomics of gut worm (Eisenia foetida Savigny) and their association with vermistabilization was studied to determine the quantification of microbial groups in reactors. Worms were reared in three reactors viz. rice, straw, sugarcane trash, kitchen waste along with cow dung in 2:1 ratio for seventy days. The microbial load (Pseudomonas sp., Streptosporangium sp., Salmonella sp., Shigella sp. Flexibacter sp. and Escherichia sp.) in gut and cast, total nitrogen, potassium, organic carbon in reactors was determined, periodically. The microbial population in gut and reactors were determined using pour plate method The microbiomics of gut and casting revealed the removal of Salmonella (12-17×l0 3±0.02 to 0-4×l0 3±0.05 cfu g -1), Shigella (3-5×l0 3±0.04 to 0.00±0.08 cfu g -1), Flexibacter (6-10×10 4±0.05 to 00.0±0.05 cfu g -1), Escherichia (8×l0 2±0.02 to 0.00-1×10 1±0.05 cfu g -1) during vermistabilization, indicating the selective nature of feeding of earthworms which helps in the removal of pathogens as they enter in food chain of worms. However, increase in the number of Pseudomonas (13-16×10 4±0.05 to 18-22×l0 5±1.0 cfu g -1), Streptosporangium (12-14×l0 4±0.05 to 18-20×l0 6±1.0 cfu g -1) seems to be responsible for reduction of pathogens and mineralization of other organics during the waste degradation process. © 2011 Asian Network for Scientific Information. Source

Kumar R.,Ds College Dr Bra University | Singh B.L.,Ds College Dr Bra University | Kumar U.,Ds College Dr Bra University | Verma D.,Ds College Dr Bra University | Shweta,Ds College Dr Bra University
Bioresource Technology | Year: 2010

In the present study, the role of earthworm species Drawida willsi Michalsen in cellulose decomposition of microbial rich pressmud substrate has been evaluated, and to assess whether this native species of earthworm digest cellulose directly (with associated gut microbiota) and also to know if there is any effect on microbial biomass and activity leading to a change in the equilibrium between fungi and bacteria during decomposition process. The findings suggest that the presence or absence of earthworms in vermireactors significantly increased the rate of cellulose decomposition (0.43 and 0.26% cellulose loss day-1 with and without earthworms, respectively). However, the direct contribution of D. willsi to degradation of cellulose was not significant; although the presence of earthworms considerably increased microbial biomass and cellulase and β-glucosidase activity. © 2010 Elsevier Ltd. Source

Discover hidden collaborations