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Title: | Anaerobic treatment of olive mill wastewater and piggery effluents fermented with Candida tropicalis |
Authors: | Gregorio, Martinez-Garcia Anbu Clemensis, Johnson Robert T., Bachmann Ceri J., Williams Andrea, Burgoyne Robert G.J., Edyvean |
Keywords: | Olive mill wastewater Aerobic fermentation Anaerobic digestion Bio-degradation Candida tropicalis Phenolic compounds Sewage -- Purification Wastewater treatment |
Issue Date: | May-2009 |
Publisher: | Elsevier B.V. |
Citation: | Journal of Hazardous Materials, vol.164 (2-3), 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 Lbiogas Lreactor- 1 da y- 1, 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/wps/find/homepage.cws_home |
URI: | http://www.sciencedirect.com/science/journal/03043894 http://dspace.unimap.edu.my/123456789/6664 |
ISSN: | 03043-894 |
Appears in Collections: | School of Environmental Engineering (Articles) |
Files in This Item:
File | Description | Size | Format | |
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Abstract.pdf | 9.25 kB | Adobe PDF | View/Open |
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