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Biodegradation of Olive Mill Wastewater by Trichosporon Cutaneum and Geotrichum Candidum Cover

Biodegradation of Olive Mill Wastewater by Trichosporon Cutaneum and Geotrichum Candidum

Open Access
|Dec 2010

Abstract

Olive oil production generates large volumes of wastewater. These wastewaters are characterised by high chemical oxygen demand (COD), high content of microbial growth-inhibiting compounds such as phenolic compounds and tannins, and dark colour. The aim of this study was to investigate biodegradation of olive mill wastewater (OMW) by yeasts Trichosporon cutaneum and Geotrichum candidum. The yeast Trichosporon cutaneum was used because it has a high potential to biodegrade phenolic compounds and a wide range of toxic compounds. The yeast Geotrichum candidum was used to see how successful it is in biodegrading compounds that give the dark colour to the wastewater. Under aerobic conditions, Trichosporon cutaneum removed 88 % of COD and 64 % of phenolic compounds, while the dark colour remained. Geotrichum candidum grown in static conditions reduced COD and colour further by 77 % and 47 %, respectively. This investigation has shown that Trichosporon cutaneum under aerobic conditions and Geotrichum candidum under facultative anaerobic conditions could be used successfully in a two-step biodegradation process. Further investigation of OMW treatment by selected yeasts should contribute to better understanding of biodegradation and decolourisation and should include ecotoxicological evaluation of the treated OMW.

DOI: https://doi.org/10.2478/10004-1254-61-2010-2079 | Journal eISSN: 1848-6312 | Journal ISSN: 0004-1254
Language: English, Croatian, Slovenian
Page range: 399 - 405
Published on: Dec 23, 2010
Published by: Institute for Medical Research and Occupational Health
In partnership with: Paradigm Publishing Services
Publication frequency: 4 issues per year

© 2010 Tibela Dragičević, Marijana Hren, Margareta Gmajnić, Sanja Pelko, Dzoko Kungulovski, Ivan Kungulovski, Domagoj Čvek, Jadranka Frece, Ksenija Markov, Frane Delaš, published by Institute for Medical Research and Occupational Health
This work is licensed under the Creative Commons License.

Volume 61 (2010): Issue 4 (December 2010)