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Author Eastman, Bruce R. ♦ Kane, Philip N. ♦ Edwards, Clive A. ♦ Trytek, Linda ♦ Gunadi, Bintoro ♦ Stermer, Andrea L. ♦ Mobley, Jacquelyn R.
Source CiteSeerX
Content type Text
File Format PDF
Subject Domain (in DDC) Computer science, information & general works ♦ Data processing & computer science
Subject Keyword 6-log Reduction ♦ Control Row ♦ Human Pathogen Reduction ♦ Usepa Biosolids Stabilization ♦ Enteric Virus ♦ Salmonella Spp ♦ Test Row ♦ Test Row Sample ♦ Fecal Coliforms ♦ Elimi-nating Human Pathogen ♦ Wet Weight Earthworm Biomass ♦ Helminth Ovum ♦ 4-log Reduction ♦ United State Environmental Protection Agency ♦ Wastewater Treatment Facility ♦ Pathogen Indicator ♦ Field Experiment ♦ Domestic Wastewater Residual ♦ Ex-perimental Site ♦ Earthworm Substrate ♦ Test Row Sam-ples ♦ Eisenia Fetida ♦ Human-pathogen Indicator ♦ Class Biosolids
Abstract A field experiment tested the feasibility of vermicomposting as a method for elimi-nating human pathogens to obtain United States Environmental Protection Agency (USEPA) Class A stabilization in domestic wastewater residuals (biosolids). The ex-perimental site was at the City of Ocoee’s Wastewater Treatment Facility in Ocoee, Florida, and Class B biosolids were used as the earthworm substrate. Two windrows of biosolids 6 m long were heavily inoculated with four human-pathogen indicators, fecal coliforms, Salmonella spp., enteric viruses and helminth ova. The test row was seeded with earthworms, Eisenia fetida. The quantity of E. fetida was calculated at a 1:1.5 wet weight earthworm biomass to biosolids ratio and the earthworms allowed time to consume the biosolids and stabilize the biosolids. The test indicated that all of the pathogen indicators in the test row were decreased more than in the control row within 144 hours. The test row samples showed a 6.4-log reduction in fecal coliforms compared with the control row, which only had a 1.6-log reduction. The test row sam-ples showed an 8.6-log reduction in Salmonella spp., while the control row had a 4.9-log reduction. The test row samples showed a 4.6-log reduction in enteric viruses
Educational Role Student ♦ Teacher
Age Range above 22 year
Educational Use Research
Education Level UG and PG ♦ Career/Technical Study