期刊
JOURNAL OF ENVIRONMENTAL SCIENCES
卷 29, 期 -, 页码 139-145出版社
SCIENCE PRESS
DOI: 10.1016/j.jes.2014.07.027
关键词
Submerged membrane bioreactor; Dielectrophoresis; Inhomogeneous electric field; Fouling
资金
- Qatar University
A novel method was developed to suppress membrane fouling in submerged membrane bioreactors. The method is based on the dielectrophoretic (DEP) motion of particles in an inhomogeneous electrical field. Using a real sample of biomass as feed, the fouling-suppression performance using DEP with different electrical field intensities (60-160 V) and different frequencies (50-1000 Hz) was investigated. The fouling-suppression performance was found to relate closely with the intensity and frequency of the electrical field. A stronger electrical field was found to better recover the filtrate flux. This is because of a stronger DEP force acting on the biomass particles close to the membrane's surface. Above an intensity and frequency value of 130 V and 1 kHz, respectively the permeate flux was reduced due to an electrothermal effect. (C) 2014 The Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences.
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