TY - GEN
T1 - Selenium Reduction in Batch Bioreactors
AU - Ji, Yuxia
AU - Wang, Yi Tin
PY - 2016
Y1 - 2016
N2 - Selenium is toxic to aquatic life at very low levels and can also be harmful to human health. Anthropogenic sources of selenium are wide spread including electronic and photography, glass manufacturing, pigments, additives for metal processing, copper refining operations, fossil fuel combustion, petroleum refining, and agricultural drainage waters in the Western United States. This study investigates selenium removal by microbial reduction with a pure culture of selenium-reducing bacterium Escherichia coli strain EWB32213 isolated in our laboratory from a coal slurry pond. Environmental factors evaluated include temperature, pH, and selenium concentration with optimal conditions observed at pH 7 and 30°C. A two-stage reduction process, from selenate to selenite, followed by selenite to elemental selenium and subsequent precipitation was observed in the batch culture. The reduction of selenite to elemental selenium in the second stage was found to be the rate limiting process with reduction rate significantly lower than that in the first-stage.
AB - Selenium is toxic to aquatic life at very low levels and can also be harmful to human health. Anthropogenic sources of selenium are wide spread including electronic and photography, glass manufacturing, pigments, additives for metal processing, copper refining operations, fossil fuel combustion, petroleum refining, and agricultural drainage waters in the Western United States. This study investigates selenium removal by microbial reduction with a pure culture of selenium-reducing bacterium Escherichia coli strain EWB32213 isolated in our laboratory from a coal slurry pond. Environmental factors evaluated include temperature, pH, and selenium concentration with optimal conditions observed at pH 7 and 30°C. A two-stage reduction process, from selenate to selenite, followed by selenite to elemental selenium and subsequent precipitation was observed in the batch culture. The reduction of selenite to elemental selenium in the second stage was found to be the rate limiting process with reduction rate significantly lower than that in the first-stage.
UR - http://www.scopus.com/inward/record.url?scp=84976466630&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84976466630&partnerID=8YFLogxK
U2 - 10.1061/9780784479889.019
DO - 10.1061/9780784479889.019
M3 - Conference contribution
AN - SCOPUS:84976466630
T3 - World Environmental And Water Resources Congress 2016: Water, Wastewater, and Stormwater and Urban Watershed Symposium - Papers from Sessions of the Proceedings of the 2016 World Environmental and Water Resources Congress
SP - 175
EP - 184
BT - World Environmental And Water Resources Congress 2016
A2 - Reinhart, Debra
A2 - Pathak, Chandra S.
Y2 - 22 May 2016 through 26 May 2016
ER -