Nitrate-Removal Activity of a Biofilm Attached to a Perlite Carrier under Continuous Aeration Conditions

Takahiro YAMASHITA; Hiroshi YOKOYAMA; Sumiyo KANAFUSA; Akifumi OGINO; Mitsuyoshi ISHIDA; Takashi OSADA; Yasuo TANAKA

doi:10.1271/bbb.100647

This article has now been updated. Please use the final version.

Nitrate-Removal Activity of a Biofilm Attached to a Perlite Carrier under Continuous Aeration Conditions

Takahiro YAMASHITA, Hiroshi YOKOYAMA, Sumiyo KANAFUSA, Akifumi OGINO, Mitsuyoshi ISHIDA, Takashi OSADA, Yasuo TANAKA

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Keywords: nitrate removal, Thauera spp., perlite carrier, dairy farm wastewater, 16S rRNA gene

JOURNAL FREE ACCESS Advance online publication

Article ID: 100647

DOI https://doi.org/10.1271/bbb.100647

The final version of this article is now available: Vol. 75 (2011) , No. 3 p.578

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Abstract

The nitrate-removal activity of a biofilm attached to a perlite carrier from an aerobic bioreactor used for treating dairy farm wastewater was examined by batch experiments under continuous aeration conditions. Despite aeration, the biofilm removed nitrate at a rate of 114.4 mg-N/kg-perlite/h from wastewater containing cow milk and manure. In a clone library analysis of the biofilm, bacteria showing high similarity to the denitrifying bacteria Thauera spp. were detected.

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