Water Science & Technology: Water Supply Vol 6 No 6 pp 111–117 © IWA Publishing 2006 doi:10.2166/ws.2006.951
Development of a low-cost dynamic filter immersed in activated sludge system
G.H. Chen and S.K. Pang
Department of Civil Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, , China (E-mail: ceghchen@ust.hk)
ABSTRACT
Wasted non-woven material was employed to develop a dynamic filter immersed in bioreactor (DFIB) to treat low strength wastewater. A bench-scale DFIB was investigated to evaluate its feasibility. The maximum permeate flux of this innovative DFIB was more than 3 times greater than that of a conventional non-woven filter and even similar to that of a mesh filter, while the effluent quality of the developed DFIB in terms of turbidity, SS, and COD was better than that of a mesh filter, which were below 1.5 NTU, 3 and 35 mg/L, respectively. Such effluent quality with appropriate disinfection could meet the requirement for wastewater reuse for various urban usages. The acceptable MLSS level was identified not greater than 5 g/L in order to secure the effluent quality, when the maximum permeate flux of 1.5 m3/m2·day and daily backwash are applied. The large permeate flux rate and relatively high MLSS level of the DFIB can achieve cost-effective treatment of low strength wastewater.
Keywords: Dynamic filter; effluent quality; low-strength wastewater reuse; permeate flux; wasted non-woven material
Full article (PDF Format)
PAY-PER-VIEW: Buy this article for £20.00 (IWA MEMBER PRICE: £15.00)
|
