微生物研究と環境バイオ産業・産業界への技術応用の視点から

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There has been increasing concern recently over the potential of estrogens and their mimics to causeestrogenic effects on aquatic fauna. Recently, we found Sphingomonas cloacae, the nonylphenol-degrading bacterium, and Novosphingobium tardaugenes, the estradiol-degrading bacterium, fromsewage treatment plants. Nonylphenol was biodegraded to nonanol, while estradiol was suggested tobe degraded to CO2 or volatile compounds. Subsequently, S. cloacae was evaluated for its utility inremediation of NP-contaminated wastewater. We next constructed and evaluated a lab-scalewastewater treatment system with a 3 L column which was filled with S. cloacae-immobilizingcarriers. The system worked properly and removed several hundreds of ppb of NP to ecologically safeconcentrations of less than 10 ppb in wastewater. The wastewater samples with pH values of 6 or 8were also treated efficiently without pH adjustment. These results suggested that the biotreatmentsystem could efficiently remediate industrial wastewater and contribute to the preservation of aquaticenvironments.
室蘭工業大学の論文
2003-11-30