期刊
BIORESOURCE TECHNOLOGY
卷 183, 期 -, 页码 33-41出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2015.02.018
关键词
Submerged membrane bioreactor (SMBR); Pendulum type oscillation (PTO); Permeability; Fouling control; Oily wastewater
资金
- National Natural Science Foundation of China [21236008, 21476206]
- Zhejiang Provincial Bureau of Science and Technology [2014C33032]
In this study, a novel submerged membrane bioreactor (SMBR) with pendulum type oscillation (PTO) hollow fiber membrane modules was developed to treat oily wastewater and control the problem of membrane fouling. To assess the potential of PTO membrane modules, the effect of oscillation orientation and frequency on membrane permeability was investigated in detail. The forces exerted on sludge flocs in the oscillating SMBR were analyzed to evaluate the impact of membrane oscillating on the cake layer resistance reduction. Results showed that the optimized PTO SMBR system exhibited 11 times higher membrane permeability and better fouling controllability than the conventional MBR system. By hydrodynamic analysis, it was found that the cooperative effect of bubble-induced turbulence and membrane oscillation in PTO SMBR system generated strong shear stress at liquid-membrane interface in vertical and horizontal direction and effectively hindered the particles from depositing on membrane surface. (C) 2015 Elsevier Ltd. All rights reserved.
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