title: Interactions among mononitrophenol isomers during biodegradation of their mixtures.
abstract: Continuous aerobic biodegradation of 4-NP, 3-NP and 2-NP mixture was monitored in a packed bed reactor in simulated wastewater with a mixed microbial culture immobilized on expanded slate. Substrate loading was varied by increasing the concentration of one isomer while keeping the other two at constant levels, all at a constant residence time of 60 min. At large concentrations, all of the individual NP isomers suppressed the degradation rates of the other isomers at steady state; however, the observed patterns and threshold concentrations were different for all three substrates. As a result, conditions were determined for stable and efficient removal of NP mixtures. Changes of the biofilm composition during a long-term operation were identified.
authors.affiliation: a Institute of Chemical Technology, Department of Biotechnology , Prague , Czech Republic.
authors.forename: Jan
authors.initials: J
authors.lastname: Paca
authors.forename: Martin
authors.initials: M
authors.lastname: Halecky
authors.forename: Pavlina
authors.initials: P
authors.lastname: Karlova
authors.forename: Tereza
authors.initials: T
authors.lastname: Gelbicova
authors.forename: Evguenii
authors.initials: E
authors.lastname: Kozliak
mesh_terms: D001673:Biodegradation, Environmental; D018441:Biofilms; D019149:Bioreactors / Q000382:microbiology*; D018153:Czech Republic; D007536:Isomerism; D009596:Nitrophenols / Q000378:metabolism*; D012988:Soil Microbiology; D062065:Wastewater / Q000737:chemistry* / Q000382:microbiology*; D014874:Water Pollutants, Chemical / Q000378:metabolism*
chemical_list: D009596:Nitrophenols; D062065:Wastewater; D014874:Water Pollutants, Chemical
keywords: Biofilm composition; nitrophenol mixtures; packed bed reactor; wastewater treatment