title: Potential of a new biotreatment: Sphingomonas cloacae S-3T degrades nonylphenol in industrial wastewater.
abstract: Sphingomonas cloacae S-3(T), a nonylphenol (NP)-degrading bacterium, was evaluated for its utility in the remediation of NP-contaminated wastewater. In flask-scale experiments, S-3(T) cells immobilized on porous polypropylene carriers (beads) efficiently degraded NP to concentrations routinely measured in aquatic environments [a few parts per billion (ppb), or micrograms per liter). Therefore, we constructed and evaluated a laboratory-scale wastewater treatment system with a 3-l carrier-filled column. The system worked properly and consistently removed several hundred ppb of NP to ecologically safe concentrations of less than 10 ppb in industrial wastewater without the addition of nutrients. The effect of wastewater pH on the system performance was also evaluated; and wastewater samples with pH values of 6 or 8 were treated efficiently without pH adjustment. These results suggest that a biotreatment system using NP-degrading bacteria can efficiently remediate industrial wastewater and contribute to the preservation of aquatic environments.
authors.affiliation: Department of Applied Chemistry, Muroran Institute of Technology, Mizumoto, Muroran, 050-8585, Hokkaido, Japan. kfu@mmm.muroran-it.ac.jp
authors.forename: Katsuhiko
authors.initials: K
authors.lastname: Fujii
authors.forename: Ryohei
authors.initials: R
authors.lastname: Yamamoto
authors.forename: Tadaharu
authors.initials: T
authors.lastname: Tanaka
authors.forename: Takayoshi
authors.initials: T
authors.lastname: Hirakawa
authors.forename: Shintaro
authors.initials: S
authors.lastname: Kikuchi
mesh_terms: D018533:Biomass; D003470:Culture Media; D006863:Hydrogen-Ion Concentration; D007218:Industrial Microbiology / Q000379:methods; D010636:Phenols / Q000378:metabolism*; D012722:Sewage / Q000382:microbiology*; D020578:Sphingomonas / Q000254:growth & development / Q000378:metabolism*; D014865:Waste Disposal, Fluid / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000378:metabolism*
chemical_list: D003470:Culture Media; D010636:Phenols; D012722:Sewage; D014874:Water Pollutants, Chemical; C025256:nonylphenol