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Biodegradation of olive mill wastewaters by a wild isolate of Candida oleophila
journal contribution
posted on 2015-12-08, 12:56 authored by Carla Amaral, Marco Lucas, Ana Sampaio, Jose A. Peres, Albino A. Dias, Francisco Peixoto, Maria do Rosario Anjos, Celia PaisOlive mill wastewaters (OMW) resulting from the extraction of olive oil possess high organic loads and
elevated contents in phenolic compounds, which are usually toxic and recalcitrant to biological wastewater
treatments. In this work, a strain of Candida oleophila isolated from olive wastewaters was used for
biological detoxification treatments of OMW samples. The effect of treatment with this isolate was
evaluated by using germination tests, bioluminescence assays, and studies on mitochondrial bioenergetics.
Incubation with the C. oleophila isolate was able to remove about 50% of the organic load, and 83%
of total polyphenol content, from undiluted and non-supplemented OMW samples. Germination tests
confirmed the reduction of toxicity of the treated effluent since when using diluted and treated OMW the
germination index increased up to 32% when compared to the values obtained with untreated water.
Treated OMW also decreased antimicrobial activity in about 50% as confirmed by the bioluminescence
inhibition assay. Significant effects were also observed in mitochondrial bioenergetics. A decrease of
toxicity toward two respiratory complexes, namely succinate dehydrogenase and ATPase, was recorded
when using treated OMW. Overall, this C. oleophila isolate was able to remove organic matter and
decrease toxicity of OMW effluents, showing promising abilities for future application in biological
treatments.
History
School
- Aeronautical, Automotive, Chemical and Materials Engineering
Department
- Chemical Engineering
Published in
International Biodeterioration & BiodegradationVolume
68Pages
45 - 50Citation
AMARAL, C. ... et al, 2012. Biodegradation of olive mill wastewaters by a wild isolate of Candida oleophila. International Biodeterioration & Biodegradation, 68, pp.45-50Publisher
© Elsevier LtdVersion
- NA (Not Applicable or Unknown)
Publisher statement
This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/Publication date
2012Notes
This paper is closed access.ISSN
0964-8305Publisher version
Language
- en