Journal
WATER SCIENCE AND TECHNOLOGY
Volume 65, Issue 9, Pages 1599-1605Publisher
IWA PUBLISHING
DOI: 10.2166/wst.2012.051
Keywords
biodegradation; coagulation; reclamation; trickling filter; ultrafiltration; wastewater treatment
Funding
- Funds for Creative Research Groups of China [51121062]
- National Water Pollution Control and Management Key Project 'Key Technology for Water Pollution Control and Management in small Cities and Towns' [2009ZX07317-008]
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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).
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