Effect of organic loading rate on organic matter and foulant characteristics in membrane bio-reactor

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• 作者：M.A.H. Johir^a ; S. Vigneswaran^a ; ^{s.vigneswaran@uts.edu.au} ; A. Sathasivan^b ; J. Kandasamy^a ; C.Y. Chang^c
• 关键词：Membrane bio-reactor ; OLR ; Membrane fouling ; TMP ; LC-OCD
• 刊名：Bioresource Technology
• 出版年：2012
• 期刊代码：11_09608524
• 类别：ce
• 出版时间：June, 2012
• 卷：113
• 期：Complete
• 页码：154-160
• 文件大小：627 K

摘要

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/m³ d. The hydrodynamic parameters of the MBR were kept constant. The hydraulic retention time and sludge retention time were kept at 8 h and 40 d respectively. From the experimental investigation, it was found that the removal efficiency of DOC, COD and NH₄-N decreased when OLRs were increased from 0.5 to 3.0 kg COD/m³ d. Higher OLRs of 2.75-3.0 kg COD/m³ 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.