Denitrifying bioreactors for treatment of tile drainage

Laura E. Christianson, Alok Bhandari, Matthew H. Helmers, Martin St Clair

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Much of the hypoxia in the Gulf of Mexico has been attributed to agricultural nonpoint pollution sources in the Midwestern states. There is, therefore, a critical need to develop practical and cost effective methods to reduce nitrate loadings from these areas. As the hypoxic zone is thought to be larger this year than ever before, the time is ripe for new technologies to reduce nutrient loads in the Mississippi River. Denitrifying drainage bioreactors can provide cost-effective treatment of tile water at the field scale while requiring minimal system maintenance. These bioreactors consist of a trench filled with an available carbon source (usually woodchips) that is readily colonized by bacteria and fungi capable of utilizing nitrate as an electron acceptor. A handful of such bioreactors have been installed in the US Midwest and have shown good nitrate removal. This poster describes the design, field installation, and cost estimates of full-scale denitrifying bioreactors.

Original languageEnglish (US)
Title of host publicationProceedings of World Environmental and Water Resources Congress 2009 - World Environmental and Water Resources Congress 2009
Subtitle of host publicationGreat Rivers
Pages4078-4087
Number of pages10
DOIs
StatePublished - 2009
Externally publishedYes
EventWorld Environmental and Water Resources Congress 2009: Great Rivers - Kansas City, MO, United States
Duration: May 17 2009May 21 2009

Publication series

NameProceedings of World Environmental and Water Resources Congress 2009 - World Environmental and Water Resources Congress 2009: Great Rivers
Volume342

Other

OtherWorld Environmental and Water Resources Congress 2009: Great Rivers
Country/TerritoryUnited States
CityKansas City, MO
Period5/17/095/21/09

ASJC Scopus subject areas

  • General Environmental Science

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