title: Kinetics modeling predicts bioaugmentation with Sphingomonad cultures as a viable technology for enhanced pharmaceutical and personal care products removal during wastewater treatment.
abstract: Pharmaceutical and personal care products (PPCPs) discharged with wastewater treatment effluents are a surface water quality concern. PPCPs are partially removed during wastewater treatment and biological transformation is an important removal mechanism. To investigate the potential for enhanced PPCP removal using bioaugmentation, bacteria were previously isolated from activated sludge capable of degrading PPCPs to ng/L concentrations. This study examined the degradation kinetics of triclosan and bisphenol A by five of these bacteria, both in pure culture and when augmented to activated sludge. Sorption coefficients were determined to account for the influence of partitioning during bioremoval. When the bacteria were added to activated sludge, degradation increased. Experimentally determined kinetic parameters were used to model a full-scale continuous treatment process, showing that low biomass could achieve reduced effluent PPCP concentrations. These results demonstrated that bioaugmentation may improve PPCP removal using established wastewater infrastructure under conditions of high solids partitioning.
authors.affiliation: University of Washington, Department of Civil and Environmental Engineering, More Hall 201, Box 352700, Seattle, WA 98195-2700, USA.
authors.forename: Nicolette A
authors.initials: NA
authors.lastname: Zhou
authors.affiliation: University of Washington, Department of Civil and Environmental Engineering, More Hall 201, Box 352700, Seattle, WA 98195-2700, USA.
authors.forename: April C
authors.initials: AC
authors.lastname: Lutovsky
authors.affiliation: University of Washington, Department of Civil and Environmental Engineering, More Hall 201, Box 352700, Seattle, WA 98195-2700, USA.
authors.forename: Greta L
authors.initials: GL
authors.lastname: Andaker
authors.affiliation: University of Washington, Department of Civil and Environmental Engineering, More Hall 201, Box 352700, Seattle, WA 98195-2700, USA.
authors.forename: John F
authors.initials: JF
authors.lastname: Ferguson
authors.affiliation: University of Washington, Department of Civil and Environmental Engineering, More Hall 201, Box 352700, Seattle, WA 98195-2700, USA. Electronic address: hgough@u.washington.edu.
authors.forename: Heidi L
authors.initials: HL
authors.lastname: Gough
mesh_terms: D000704:Analysis of Variance; D001559:Benzhydryl Compounds / Q000378:metabolism; D001673:Biodegradation, Environmental; D002851:Chromatography, High Pressure Liquid; D003358:Cosmetics / Q000032:analysis / Q000378:metabolism*; D007700:Kinetics; D008954:Models, Biological; D004364:Pharmaceutical Preparations / Q000032:analysis / Q000378:metabolism*; D010636:Phenols / Q000378:metabolism; D012044:Regression Analysis; D012722:Sewage / Q000382:microbiology; D020578:Sphingomonas / Q000378:metabolism*; D053719:Tandem Mass Spectrometry; D014260:Triclosan / Q000378:metabolism; D062065:Wastewater / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000032:analysis / Q000378:metabolism*; D018508:Water Purification / Q000379:methods*; D000098826:Bisphenol A Compounds
chemical_list: D001559:Benzhydryl Compounds; D003358:Cosmetics; D004364:Pharmaceutical Preparations; D010636:Phenols; D012722:Sewage; D014260:Triclosan; D062065:Wastewater; D014874:Water Pollutants, Chemical; C006780:bisphenol A; D000098826:Bisphenol A Compounds
keywords: BPA; CMAS model; Endocrine disruptors; Sphingomonads; Xenobiotic