Nitrate-Removal Activity of a Biofilm Attached to a Perlite Carrier under Continuous Aeration Conditions
2011
YAMASHITA, Takahiro | Yokoyama, Hiroshi | KANAFUSA, Sumiyo | OGINO, Akifumi | ISHIDA, Mitsuyoshi | Osada, Takashi | Tanaka, Yasuo
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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