Low impact of fouling in MBR process using non-woven fabric filter followed by micro-porous membrane and chemical addition

Title
Low impact of fouling in MBR process using non-woven fabric filter followed by micro-porous membrane and chemical addition
Authors
이정열오해석송경근맹승규안규홍
Keywords
non-woven fabric filters; chemical addition; Anoxic-aerobic process; phosphorus
Issue Date
2011-06
Publisher
IWA-LET 2011
Abstract
Crucial membrane resistance was caused by cake accumulated on a membrane in where higher concentration of mixed liquid suspended solids (MLSS) needs to be maintained by long SRT. And some concentration of soluble substances like soluble microbial products (SMP) and extracellular polymeric substance (EPS) in the bulk phase result in fouling inside of membrane pore. So, many researchers have carried out to minimize fouling by coagulating/flocculating with chemical addition [Koseoglu et al., 2008]. Especially, organic flocculants and metal salts have been used for fouling reduction test of MBRs. Injection of chemicals, alum or FeCl3 contributed to removal of phosphorous while some literature reported that PACl strongly impacted on the deterioration of nitrification and denitrification rate [Iversen et al., 2009]. On the other hand, Song et al. had observed membrane fouling and removal of phosphorous by addition of alum and FeCl3 into an aerobic reactor combined with a pre-anoxic system. There was no deterioration in nitrogen removal satisfying with good performance of phosphorous removal, also. Addition of chemicals in order to enhance not only life cycle of membrane but also removal of nutrients in MBRs should be considered in the view of fouling reduction as well as microbial activity.
URI
http://pubs.kist.re.kr/handle/201004/40516
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KIST Publication > Conference Paper
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