期刊
WATER SCIENCE AND TECHNOLOGY
卷 66, 期 4, 页码 850-857出版社
IWA PUBLISHING
DOI: 10.2166/wst.2012.258
关键词
ameliorative system; hydraulic retention time; mixed liquor recirculation rate; organic loading rate; synthetic wastewater
资金
- National Key Special Projects of SAFEA [20104100141]
- Grant Project of Technical Innovation Team in Zhengzhou (China) [094SYJH36069]
Synthetic wastewater was treated using a novel system integrating the reversed anoxic/anaerobic/oxic (RAAO) process, a micro-electrolysis (ME) bed and complex biological media. The system showed superior chemical oxygen demand (COD), total nitrogen (TN) and total phosphorus (TP) removal rates. Performance of the system was optimised by considering the influences of three major controlling factors, namely, hydraulic retention time (HRT), organic loading rate (OLR) and mixed liquor recirculation (MLR). TP removal efficiencies were 69, 87, 87 and 83% under the HRTs of 4, 8, 12 and 16 h. In contrast, HRT had negligible effects on the COD and TN removal efficiencies. COD, TN and TP removal efficiencies from synthetic wastewater were 95, 63 and 87%, respectively, at an OLR of 1.9 g/(L.d). The concentrations of COD, TN and TP in the effluent were less than 50, 15 and 1 mg/L, respectively, at the controlled MLR range of 75-100%. In this system, organics, TN and TP were primarily removed from anoxic tank regardless of the operational conditions.
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