期刊
WATER SCIENCE AND TECHNOLOGY
卷 66, 期 5, 页码 1139-1146出版社
IWA PUBLISHING
DOI: 10.2166/wst.2012.284
关键词
bio-diatomite dynamic membrane; gravity filtration; high flux; particles; pollutant removal
资金
- National Natural Science Foundation of China [51138009]
- Foundation of the State Key Laboratory of Pollution Control and Resource Reuse, China [PCRRY11015]
- project of the Science and Technology Commission of Shanghai Municipality [11dz1211202]
- Special Foundation of China Postdoctoral Science Foundation [201104290]
A bio-diatomite dynamic membrane (BDDM) reactor for surface water treatment under a water head of 30, 40, 50, 60 and 70 cm, respectively, was investigated, which was very effective for pollutants removal. The water head exerted strong influences on filtration flux of BDDM during the precoating process, as well as on the formation of BDDM and turbidity variations. A high filtration flux (approximately 200-300 L/m(2) h) could be achieved in the long filtration times of BDDM with a stable effluent turbidity of approximately 0.11-0.25 NTU. The BDDM could remove particles larger than 25 mu m completely. The adopted sintered diatomite mainly consisted of macro pores, which were beneficial for improving the filtration flux of BDDM. During the backwash stage, the BDDM could be removed completely by the air backwash.
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