Biodegradation and detoxification of olive mill wastewater by selected strains of the mushroom genera Ganoderma and Pleurotus

0388286 - MBÚ 2013 RIV GB eng J - Journal Article
Ntougias, S. - Baldrian, Petr - Ehaliotis, C. - Nerud, František - Antoniou, T. - Merhautová, Věra - Zervakis, G.
Biodegradation and detoxification of olive mill wastewater by selected strains of the mushroom genera Ganoderma and Pleurotus.
Chemosphere. Roč. 88, č. 5 (2012), s. 620-626. ISSN 0045-6535. E-ISSN 1879-1298
Institutional research plan: CEZ:AV0Z50200510
Keywords : White-rot fungi * Mushroom * Toxicity
Subject RIV: EE - Microbiology, Virology
Impact factor: 3.137, year: 2012

Thirty-nine white-rot fungi belonging to nine species of Agaricomycotina (Basidiomycota) were initially screened for their ability to decrease olive-mill wastewater (OMW) phenolics. Four strains of Ganoderma australe, Ganoderrna carnosum, Pleurotus eryngii and Pleurotus ostreatus, were selected and further examined for key-aspects of the OMW biodegradation process. Fungal growth in OMW-containing batch cultures resulted in significant decolorization (by 40-46% and 60-65% for Ganoderma and Pleurotus spp. respectively) and reduction of phenolics (by 64-67% and 74-81% for Ganoderma and Pleurotus spp. respectively). COD decrease was less pronounced (12-29%). Cress-seeds germination increased by 30-40% when OMW was treated by Pleurotus strains. Toxicity expressed as inhibition of Aliivibrio fischeri luminescence was reduced in fungal-treated OMW samples by approximately 5-15 times compared to the control. As regards the pertinent enzyme activities, laccase and Mn-independent peroxidase were detected for Ganoderma spp. during the entire incubation period. In contrast, Pleurotus spp. did not exhibit any enzyme activities at early growth stages; instead, high laccase (five times greater than those of Ganoderrna spp.) and Mn peroxidases activities were determined at the end of treatment
Permanent Link: http://hdl.handle.net/11104/0217126