期刊
JOURNAL OF MEMBRANE SCIENCE
卷 325, 期 1, 页码 271-276出版社
ELSEVIER
DOI: 10.1016/j.memsci.2008.07.040
关键词
Bio-diatomite dynamic membrane; Filtration; Municipal wastewater; Treatment
资金
- National Key Technologies R D Program [2006BAJ08B02]
- Foundation of The State Key Laboratory of Pollution Control and Resource Reuse, China [PCRRK08006]
The characteristics of bio-diatomite dynamic membrane (BDDM) process in municipal wastewater treatment were investigated with a laboratory-scale continuous-flow device. Experimental results indicate that the BDDM reactor was highly effective in removal of COD, NH4-N and TN, and exhibited the advantages of good retention capacity for suspended solids (SS), short precoating time, high filtration flux, and easy backwash. In the precoating stage, a retention time of 25 min could reduce the effluent SS to non-detectable level. The filtration resistance of BDDM was composed of thickness-increase resistance and compaction resistance. At a low flux, microbial adhesion occurred on the interface between the BDDM and the stainless steel support mesh, which negatively impacted the system operation and backwash. However, microbial adhesion could be effectively minimized by increasing the filtration flux. (C) 2008 Elsevier B.V. All rights reserved.
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