title: Genetic and chemical analyzes of transformations in compost compounds during biodegradation of oiled bleaching earth with waste sludge.
abstract: Composting of oiled bleaching earth with waste sludge and corn straw was carried out to investigate the ability of microorganisms to synthesize biosurfactants that might decrease the surface tension of composts. Analytical results and changes in the surface tension suggest that biodegradation of fatty by-products was the consequence of emulsifying properties of higher fatty acids. The surface tension for isolates from all composting phases was between 37 and 43 mN m(-1). No substances synthesized by microorganisms that might be able to decrease the surface tension were detected in composts. Tensammetric, TLC and HPLC-MS results and changes in surface tension suggest that biodegradation of fatty by-products results from the emulsifying properties of higher fatty acids. A decrease in fatty content from 144 to 6 mg g(-1) dry matter was obtained.
authors.affiliation: Institute of Food Technology of Plant Origin, Poznań University of Life Sciences, Wojska Polskiego 31, 60-624 Poznań, Poland. apio@au.poznan.pl
authors.forename: Agnieszka
authors.initials: A
authors.lastname: Piotrowska-Cyplik
authors.forename: Paweł
authors.initials: P
authors.lastname: Cyplik
authors.forename: Roman
authors.initials: R
authors.lastname: Marecik
authors.forename: Jakub
authors.initials: J
authors.lastname: Czarny
authors.forename: Andrzej
authors.initials: A
authors.lastname: Szymański
authors.forename: Bogdan
authors.initials: B
authors.lastname: Wyrwas
authors.forename: Grzegorz
authors.initials: G
authors.lastname: Framski
authors.forename: Lukasz
authors.initials: L
authors.lastname: Chrzanowski
authors.forename: Katarzyna
authors.initials: K
authors.lastname: Materna
mesh_terms: D001673:Biodegradation, Environmental; D007220:Industrial Waste / Q000517:prevention & control; D059013:Microbial Consortia / Q000235:genetics*; D009821:Oils / Q000737:chemistry / Q000378:metabolism*; D012722:Sewage / Q000382:microbiology*; D012988:Soil Microbiology; D013500:Surface Tension; D013501:Surface-Active Agents / Q000737:chemistry* / Q000378:metabolism*; D003313:Zea mays / Q000382:microbiology*
chemical_list: D007220:Industrial Waste; D009821:Oils; D012722:Sewage; D013501:Surface-Active Agents