| Literature DB >> 22206913 |
M A H Johir1, S Vigneswaran, A Sathasivan, J Kandasamy, C Y Chang.
Abstract
In this study, the influence of organic loading rate (OLR) on the performance of a membrane bio-reactor (MBR) was investigated. The MBR was operated with 6 different OLRs between 0.5 and 3.0 kg COD/m(3)d. The hydrodynamic parameters of the MBR were kept constant. The hydraulic retention time and sludge retention time were kept at 8h and 40 d respectively. From the experimental investigation, it was found that the removal efficiency of DOC, COD and NH(4)-N decreased when OLRs were increased from 0.5 to 3.0 kg COD/m(3)d. Higher OLRs of 2.75-3.0 kg COD/m(3)d resulted in a higher transmembrane pressure development. The fractionation of organic matters showed more hydrophilic substances with higher OLRs. A detailed organic matter characterization of membrane foulant, soluble microbial product and extracellular polymeric substances showed that bio-polymers type substances together with humic acid and lower molecular neutral and acids were responsible for membrane fouling.Entities:
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Year: 2011 PMID： 22206913 DOI： 10.1016/j.biortech.2011.12.002
Source DB: PubMed Journal: Bioresour Technol ISSN： 0960-8524 Impact factor: 9.642