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  • Title: Use of Geotrichum candidum for olive mill wastewater treatment in submerged and static culture.
    Author: Asses N, Ayed L, Bouallagui H, Ben Rejeb I, Gargouri M, Hamdi M.
    Journal: Bioresour Technol; 2009 Apr; 100(7):2182-8. PubMed ID: 19091553.
    Abstract:
    The production of lignin peroxidase (LiP), manganese peroxidase (MnP) and lipases by Geotrichum candidum were performed in order to control the decolourisation and biodegradation of olive mill wastewater (OMW). Optimisation of different factors showed that dilution, carbon and ammonium concentrations significantly affected decolourisation and activities of ligniolytic peroxidases (LiP and MnP) on OMW. Moreover, addition of olive oil and agitation improved the lipase production. Batch and continuous OMW treatments in settler or bubble column bioreactors showed high COD and colour removal efficiencies of 60% and 50%, respectively. Lipolytic activity was greater in the batch bubble column whereas, LiP and MnP productions were improved in the settler. The performance of the continuous processes decreased with the decrease of hydraulic retention time (HRT). It has been shown that decolourisation and biodegradation decreased with an average of 40% and 45%, respectively, by decreasing the HRT from 4d to 1.7d.
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