caa a22 4500 465823483 CHVBK 20180323112142.0 cr unu---uuuuu 170327e19901101xx s 000 0 eng 10.1007/BF00166792 doi (NATIONALLICENCE)springer-10.1007/BF00166792 Degradation of oily sludge from a flotation unit by free and immobilized microorganisms [Elektronische Daten] [S. Omar, U. Büdecker, H.-J. Rehm] Summary: The degradation rate of hydrocarbons in oily sludge obtained from a flotation unit by free and immobilized cells in shaking flasks and in a stirred tank reactor was investigated. For the biodegration of 3.3% hydrocarbons free cells and cells immobilized on granular clay were used. Free cells needed 7-8 weeks to use 30% of the 3.3% hydrocarbons, whereas with immobilized cells the same result was obtained after 3-4 weeks only. In shaken flasks with high hydrocarbon concentrations (8%), immobilized Candida parapsilosis degraded 90% of the hydrocarbons in the oily sludge within 3 weeks, while free cells degraded only 27.5% in the same period. In degradation experiments with a bioreactor, free and immobilized cells of the isolate ISO-OS BÜ 20 showed better results compared to cultures in shaken flasks due to better aeration and mixing. Free cells degraded 50% of the 5% hydrocarbon-containing oily sludge in 7 weeks, whereas immobilized cells gave the same result after only 4 weeks. Springer-Verlag, 1990 Omar S. Institut für Mikrobiologie, Westfälische Wilhemms-Universität, Corrensstrasse 3, D-4400, Münster, Federal Republic of Germany aut Büdecker U. Institut für Mikrobiologie, Westfälische Wilhemms-Universität, Corrensstrasse 3, D-4400, Münster, Federal Republic of Germany aut Rehm H.-J Institut für Mikrobiologie, Westfälische Wilhemms-Universität, Corrensstrasse 3, D-4400, Münster, Federal Republic of Germany aut Applied Microbiology and Biotechnology Springer-Verlag 34/2(1990-11-01), 259-263 0175-7598 34:2<259 1990 34 253 https://doi.org/10.1007/BF00166792 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00166792 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Omar S. Institut für Mikrobiologie, Westfälische Wilhemms-Universität, Corrensstrasse 3, D-4400, Münster, Federal Republic of Germany aut NATIONALLICENCE 700 1- Büdecker U. Institut für Mikrobiologie, Westfälische Wilhemms-Universität, Corrensstrasse 3, D-4400, Münster, Federal Republic of Germany aut NATIONALLICENCE 700 1- Rehm H.-J Institut für Mikrobiologie, Westfälische Wilhemms-Universität, Corrensstrasse 3, D-4400, Münster, Federal Republic of Germany aut NATIONALLICENCE 773 0- Applied Microbiology and Biotechnology Springer-Verlag 34/2(1990-11-01), 259-263 0175-7598 34:2<259 1990 34 253 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer