| Literature DB >> 25710681 |
Lei Qin1, Zheng Fan1, Lusheng Xu1, Guoliang Zhang2, Guanghui Wang1, Dexin Wu1, Xuwei Long3, Qin Meng4.
Abstract
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.Entities:
Keywords: Fouling control; Oily wastewater; Pendulum type oscillation (PTO); Permeability; Submerged membrane bioreactor (SMBR)
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Year: 2015 PMID： 25710681 DOI： 10.1016/j.biortech.2015.02.018
Source DB: PubMed Journal: Bioresour Technol ISSN： 0960-8524 Impact factor: 9.642