<abstract xml:lang="en" xmlns="http://www.w3.org/1999/xhtml"><p>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 <italic>Trichosporon cutaneum</italic> and <italic>Geotrichum candidum</italic>. The yeast <italic>Trichosporon cutaneum</italic> was used because it has a high potential to biodegrade phenolic compounds and a wide range of toxic compounds. The yeast <italic>Geotrichum candidum</italic> was used to see how successful it is in biodegrading compounds that give the dark colour to the wastewater. Under aerobic conditions, <italic>Trichosporon cutaneum</italic> removed 88 % of COD and 64 % of phenolic compounds, while the dark colour remained. <italic>Geotrichum candidum</italic> grown in static conditions reduced COD and colour further by 77 % and 47 %, respectively. This investigation has shown that <italic>Trichosporon cutaneum</italic> under aerobic conditions and <italic>Geotrichum candidum</italic> 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.</p></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.

Biodegradation of Olive Mill Wastewater by <italic>Trichosporon Cutaneum</italic> and <italic>Geotrichum Candidum</italic>

Faculty of Food Technology and Biotechnology, University of Zagreb, Zagreb, Croatia

Faculty of Natural Sciences, Gazi Baba bb, Sts. Cyril and Methodius University, Skopje, Macedonia

Archives of Industrial Hygiene and Toxicology

Biodegradation of Olive Mill Wastewater by  and 

Olive oil production generates large volumes of wastewater. These wastewaters are characterised by high chemical oxygen demand (COD), high content of microbial...

Biodegradation of Olive Mill Wastewater by Trichosporon Cutaneum and Geotrichum Candidum

Publié en ligne: 23 déc. 2010

Pages: 399 - 405

DOI: https://doi.org/10.2478/10004-1254-61-2010-2079

Mots clés
detoksifikacija, fenolni spojevi, kvasci, obezbojenje

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