Role of solid retention time in the determination of specific cake resistance for a membrane bioreactor system

Title
Role of solid retention time in the determination of specific cake resistance for a membrane bioreactor system
Authors
최병규조진우서창원송경근맹승규
Keywords
membrane bioreactor; Fluorescence excitation-emission matrix; liquid chromatography-organic carbon detection; specific cake resistance; organic matter; solid retention time
Issue Date
2012-09
Publisher
IWA World Water Congress 2012
Abstract
Membrane fouling remains as a critical limiting factor for wide-spread applications of a membrane bioreactor (MBR), and the fouling phenomenon has been widely investigated. A high specific cake resistance hinders the performance of MBR by reducing the flux of a MBR. Therefore, it is important to investigate the role of solid retention time (SRT) in the performance of an MBR using specific cake resistance. The objective of this study is to investigate the effect of SRT on bulk organic matter (BOM) characteristics and specific cake resistance in an MBR system. In this study, BOM is characterized by specific ultra-violet (UV) absorbance, fluorescence excitation emission matrices (FEEM) and liquid chromatography organ carbon detection (LC-OCD). The membrane fouling formed under different BOM characteristics by changing SRT is quantified by calculating the specific cake resistance (α) using an unstirred batch cell test. Results of laboratory scale MBR experiments with three different SRTs demonstrate that specific cake resistance increases with decreasing SRT. Moreover, the changes in SRT exhibited different BOM characteristics associated with activated sludge in MBRs; however, the BOM characteristics in permeates were found to be similar.
URI
http://pubs.kist.re.kr/handle/201004/44513
Appears in Collections:
KIST Publication > Conference Paper
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