期刊
SOLAR ENERGY
卷 82, 期 9, 页码 812-819出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.solener.2008.02.015
关键词
dairy wastewater; anaerobic treatment; HUASB; solar photocatalytic treatment; TiO2
The present study was aimed to treat the dairy wastewater by using anaerobic and solar photocatalytic oxidation methods. The anaerobic treatment was carried out in a laboratory scale hybrid upflow anaerobic sludge blanket reactor (HUASB) with a working volume of 5.9 L. It was operated at organic loading rate (OLR) varying from 8 to 20 kg COD/m(3) day for a period of 110 days. The maximum loading rate of the anaerobic reactor was found to be 19.2 kg COD/m(3) day and the corresponding chemical oxygen demand (COD) removal at this OLR was 84%. The anaerobically treated wastewater at an OLR of 19.2 kg COD/m(3) day was subjected to secondary solar photocatalytic oxidation treatment. The optimum pH and catalyst loading for the solar photochemical oxidation was found to be 5 and 300 mg/L, respectively. The secondary solar photocatalytic oxidation using TiO2 removed 62% of the COD from primary anaerobic treatment. Integration of anaerobic and solar photocatalytic treatment resulted in 95% removal of COD from the dairy wastewater. The findings suggest that anaerobic treatment followed by solar photo catalytic oxidation would be a promising alternative for the treatment of dairy wastewater. (c) 2008 Published by Elsevier Ltd.
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