Selenium Reduction in Batch Bioreactors

Yuxia Ji, Yi Tin Wang

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

7 Scopus citations

Abstract

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.

Original languageEnglish
Title of host publicationWorld Environmental And Water Resources Congress 2016
Subtitle of host publicationWater, Wastewater, and Stormwater and Urban Watershed Symposium - Papers from Sessions of the Proceedings of the 2016 World Environmental and Water Resources Congress
EditorsDebra Reinhart, Chandra S. Pathak
Pages175-184
Number of pages10
ISBN (Electronic)9780784479889
DOIs
StatePublished - 2016
Event16th World Environmental and Water Resources Congress 2016: Water, Wastewater, and Stormwater and Urban Watershed Symposium - West Palm Beach, United States
Duration: May 22 2016May 26 2016

Publication series

NameWorld 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

Conference

Conference16th World Environmental and Water Resources Congress 2016: Water, Wastewater, and Stormwater and Urban Watershed Symposium
Country/TerritoryUnited States
CityWest Palm Beach
Period5/22/165/26/16

Bibliographical note

Publisher Copyright:
© ASCE.

ASJC Scopus subject areas

  • Environmental Engineering
  • Water Science and Technology

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