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Water Science & Technology Vol 65 No 9 pp 1599–1605 © IWA Publishing 2012 doi:10.2166/wst.2012.051 Integrated coagulation-trickling filter–ultrafiltration processes for domestic wastewater treatment and reclamationQing-Liang Zhao, Hui-Yuan Zhong, Jin-Li Liu and Yu LiuState Key Laboratory of Urban Water Resources and Environments (SKLUWRE), School of Domestic and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China E-mail: qlzhao@hit.edu.cn; zhql1962@yahoo.com.cnDivision of Environmental and Water Resources Engineering, School of Civil and Environmental Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore ABSTRACT More and more research effort has been put into the development of affordable and high-efficiency wastewater reclamation technology for small communities. In this study, an integrated chemically enhanced primary treatment (CEPT), trickling filter (TF) and ultrafiltration (UF) process was developed with success. Coagulant produced from fly ash was used to enhance primary treatment, while trickling filter packed with coal cinder through four-layer structure without aeration was employed for further removal of COD and ammonium-nitrogen from the CEPT effluent. 95 and 88% removal of COD and ammonium were achieved, while total phosphorus (TP) and suspended solid (SS) were found to be removed completely at a coagulant dosage of 2.5 mL/L in the CEPT–TF–UF system. The product water can meet the standard of Reuse of Recycling Water for Urban Water Quality Standard for Urban Miscellaneous Water Consumption (GB/T 18920-2002, China). Keywords: biodegradation; coagulation; reclamation; trickling filter; ultrafiltration; wastewater treatment eProduct: Buy this article for £24.00 (IWA MEMBER PRICE: £18.00) All prices include VAT. For customers where VAT should not be applied, the VAT amount will be removed upon payment |
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