Influence of Polyferric Sulfate Coagulant on the amoA mRNA Expression of Ammonia Oxidizer in Activated Sludge
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概要
- 論文の詳細を見る
Physicochemical coagulation process is one of the most popular techniques to remove phosphorus in wastewater treatment processes where the activated sludge was used. However, the influence of coagulants on biological nitrification is not elucidated in detail. Then, the influence of polyferric sulfate as coagulant on nitrogen conversion by ammonia oxidizer was investigated by using water quality test and transcript analysis. In the batch operation of the nitrification-denitrification process, Fe/P molar ratios of 0, 1 and 5 were tested. Phosphorus concentration was immediately decreased at the beginning of the experiment in the case of Fe/P = 1 and 5, however, 40% of ammonia remained in the case of Fe/P = 5. In this case, the <I>amoA</I> mRNA expression was suppressed because of the excessive addition of polyferric sulfate. Furthermore, T-RFLP profiles of <I>amoA</I> mRNA showed that polyferric sulfate affects various species of ammonia oxidizer, and some species suffer a great loss.
- Japan Society on Water Environmentの論文
著者
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Ebie Yoshitaka
Research Center For Material Cycles And Waste Management National Institute For Environmental Studie
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Xu Kaiqin
Research Center For Material Cycles And Waste Management National Institute For Environmental Studie
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EBIE Yoshitaka
Research Center for Material Cycles and Waste Management, National Institute for Environmental Studies, Japan
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YAMAZAKI Hiroshi
Planning division, Public Health Research Center of Ibaraki Pharmaceutical Association, Japan
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- Influence of Polyferric Sulfate Coagulant on the amoA mRNA Expression of Ammonia Oxidizer in Activated Sludge