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Indexed by:期刊论文

Date of Publication:2013-02-15

Journal:DESALINATION

Included Journals:SCIE、EI

Volume:311

Page Number:46-53

ISSN No.:0011-9164

Key Words:Anaerobic ammonium oxidation (Anammox); Hydrodynamics; Membrane bioreactor (MBR); Membrane fouling; Particle image velocimetry (PIV)

Abstract:A rotating flat-sheet membrane bioreactor (RFMBR) was employed to start up anammox process, in comparison with a conventional membrane bioreactor (CMBR). The anammox process was successfully started up within around 16 days in both bioreactors. The particle image velocimetry (PIV) analysis showed a larger velocity gradient and a stronger shear stress on membrane surface in RFMBR than in CMBR. At the end of the experiment, the mean particle size of anammox granules achieved 899 mu m in RFMBR, while the value reached 809 mu m in CMBR, and the trans-membrane pressure (TMP) reached 4 and 16 kPa in RFMBR and CMBR, respectively. Furthermore, the scanning electron microscope (SEM) observation of the biofilm formed on membranes illustrated that a much thinner biofilm with the thickness of 35 mu m was formed in RFMBR, compared to the value of 120 mu m in CMBR. Crown Copyright (c) 2012 Published by Elsevier B.V. All rights reserved.