title: Microbiological degradation of a spent offset-printing developer.
abstract: To decontaminate spent offset-printing developer Polychrome 4003, several microorganisms were separated from the soil that has been used for developer dumping for 3 years. Two organism cultures were isolated and identified to genus Geomyces pannorum and Bacteria spp. These organisms, as well as commercial Septic Gobbler (SG) bacteria, were used to decontaminate the developer. Reduction of both the chemical oxygen demand (COD) and the amount of total identified organic compounds reached 30% after 40 day treatment of waste suspension by G. pannorum and Bacteria spp. A substantially higher degree of COD reduction by approximately 80% and the total amount of identified organic compounds by approximately 90% was achieved when SG bacteria have been applied for the same period. According to a rapid electrophysiological test with macrophytic algae Nitellopsis obtusa, the toxicity of spent offset-printing developer Polychrome 4003 was classified as extremely toxic (>100 toxic units, T.U.), and it remained at the same level after treatment with G. pannorum and Bacteria spp. More effective biodegradation with SG bacteria diminished toxicity substantially.
authors.affiliation: Institute of Chemistry, Gostauto 9, 01108 Vilnius, Lithuania. tvengris@takas.lt
authors.forename: Tomas
authors.initials: T
authors.lastname: Vengris
authors.forename: Rima
authors.initials: R
authors.lastname: Binkiene
authors.forename: Rita
authors.initials: R
authors.lastname: Butkiene
authors.forename: Ona
authors.initials: O
authors.lastname: Nivinskiene
authors.forename: Vytautas
authors.initials: V
authors.lastname: Melvydas
authors.forename: Levonas
authors.initials: L
authors.lastname: Manusadzianas
mesh_terms: D004787:Environmental Pollution / Q000517:prevention & control*; D008401:Gas Chromatography-Mass Spectrometry; D011327:Printing / Q000295:instrumentation*; D012988:Soil Microbiology; D012989:Soil Pollutants / Q000378:metabolism*; D017550:Spectroscopy, Fourier Transform Infrared
chemical_list: D012989:Soil Pollutants