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|Title: ||Anaerobic treatment of olive mill wastewater and piggery effluents fermented with Candida tropicalis|
|Authors: ||Martinez-Garcia, Gregorio|
Johnson, Anbu Clemensis
Bachmann, Robert T.
Williams, Ceri J.
Edyvean, Robert G.J.
|Keywords: ||Anaerobic digestion;Fermentation;Olive mill wastewater;Aerobic;Biodegradation;Candida tropicalis;Phenolic;Sewage -- Purification -- Biological treatment;Anaerobic bacteria|
|Issue Date: ||24-Sep-2008|
|Publisher: ||Elsevier B.V.|
|Citation: ||Journal of Hazardous Materials, vol.164 (2-3), 30 May 2009, pages 1398-1405.|
|Abstract: ||Olive mill wastewater (OMW) contains high concentrations of phenolic compounds that are inhibitory to many microorganisms making it difficult to treat biologically prior to discharge in waterways. The total mono-cyclic phenol reduction in OMW in this study was carried out by aerobic pre-treatment using the yeast Candida tropicalis in a 18 L batch reactor at 30 °C for 12 days followed by anaerobic co-digestion. A COD removal of 62% and a reduction in the total mono-cyclic phenol content by 51% of the mixture was achieved in the aerobic pre-treatment. Pig slurry was added as co-substrate to supplement the low nitrogen levels in the olive mill wastewater. Subsequent anaerobic treatment was carried out in a 20 L fixed-bed reactor at 37 °C and HRT between 11 and 45 days. After a long start-up period, the OLR was increased from 1.25 to 5 kg COD m−3 day−1 during the last 30 days, resulting in subsequent increase in overall COD removal and biogas production, up to maximum values of 85% and 29 , respectively. Methane content of the biogas produced from the anaerobic digestion ranged between 65% and 74%.|
|Description: ||Link to publisher's homepage at http://www.elsevier.com|
|Appears in Collections:||School of Environmental Engineering (Articles)|
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