title: Biodegradation and detoxification potential of rotating biological contactor (RBC) with Irpex lacteus for remediation of dye-containing wastewater.
abstract: Use of fungal organisms in rotating biological contactors (RBC) for bioremediation of liquid industrial wastes has so far been limited in spite of their significant biodegradation potential. The purpose was to investigate the power of RBC using Irpex lacteus for decolorization and detoxification of industrial dyes and dyeing textile liquors. Recalcitrant dye Methylene Blue (150 mg L(-1)) was decolorized within 70 days, its mutagenicity removed, and the biological toxicity decreased more than 10-fold. I. lacteus biofilm in the RBC completely decolorized within 26 and 47 days dyeing liquors containing disperse or reactive dyes adjusted to pH4.5 and 5-fold diluted with the growth medium, respectively. Their respective biological toxicity values were reduced 10- to 10(4)-fold in dependence of the test used. A battery of toxicity tests comprising Vibrio fisheri, Lemna minor and Sinapis alba was efficient to monitor the toxicity of textile dyes and wastewaters. Strong decolorization and detoxification power of RBC using I. lacteus biofilms was demonstrated.
authors.affiliation: Faculty of Science, University of Ostrava, Chittussiho 10, 710 00 Slezská, Ostrava, Czech Republic. Electronic address: Katerina.Malachova@osu.cz.
authors.forename: Katerina
authors.initials: K
authors.lastname: Malachova
authors.forename: Zuzana
authors.initials: Z
authors.lastname: Rybkova
authors.forename: Hana
authors.initials: H
authors.lastname: Sezimova
authors.forename: Jiri
authors.initials: J
authors.lastname: Cerven
authors.forename: Cenek
authors.initials: C
authors.lastname: Novotny
mesh_terms: D048908:Aliivibrio fischeri / Q000187:drug effects; D029064:Araceae / Q000187:drug effects; D001673:Biodegradation, Environmental; D019149:Bioreactors; D003116:Color; D004396:Coloring Agents / Q000378:metabolism*; D019684:Magnoliopsida / Q000187:drug effects; D008751:Methylene Blue / Q000378:metabolism*; D020072:Polyporales / Q000378:metabolism*; D013783:Textile Industry; D018675:Toxicity Tests; D014865:Waste Disposal, Fluid / Q000295:instrumentation / Q000379:methods*; D062065:Wastewater / Q000633:toxicity; D014874:Water Pollutants, Chemical / Q000378:metabolism
chemical_list: D004396:Coloring Agents; D008751:Methylene Blue; D062065:Wastewater; D014874:Water Pollutants, Chemical
keywords: Biological toxicity; Dye decolorization; Genetic toxicity; Irpex lacteus; Liquid textile wastes; Rotating biological contactor