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RISS 인기검색어
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- 저자 : Fane A. G. (검색결과 4 건)
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Quorum quenching bacteria can be used to inhibit the biofouling of reverse osmosis membranes
Oh, Hyun-Suk,Tan, Chuan Hao,Low, Jiun Hui,Rzechowicz, Miles,Siddiqui, Muhammad Faisal,Winters, Harvey,Kjelleberg, Staffan,Fane, Anthony G.,Rice, Scott A. Pergamon Press 2017 Water research Vol.112 No.-
<P><B>Abstract</B></P> <P>Over the last few decades, significant efforts have concentrated on mitigating biofouling in reverse osmosis (RO) systems, with a focus on non-toxic and sustainable strategies. Here, we explored the potential of applying quorum quenching (QQ) bacteria to control biofouling in a laboratory-scale RO system. For these experiments, <I>Pantoea stewartii</I> was used as a model biofilm forming organism because it was previously shown to be a relevant wastewater isolate that also forms biofilms in a quorum sensing (QS) dependent fashion. A recombinant <I>Escherichia coli</I> strain, which can produce a QQ enzyme, was first tested in batch biofilm assays and significantly reduced biofilm formation by <I>P. stewartii</I>. Subsequently, RO membranes were fouled with <I>P. stewartii</I> and the QQ bacterium was introduced into the RO system using two different strategies, direct injection and immobilization within a cartridge microfilter. When the QQ bacterial cells were directly injected into the system, <I>N-</I>acylhomoserine lactone signals were degraded, resulting in the reduction of biofouling. Similarly, the QQ bacteria controlled biofouling when immobilized within a microfilter placed downstream of the RO module to remove QS signals circulating in the system. These results demonstrate the proof-of-principle that QQ can be applied to control biofouling of RO membranes and may be applicable for use in full-scale plants.</P> <P><B>Highlights</B></P> <P> <UL> <LI> A recombinant Quorum Quenching (QQ) bacterium controlled biofilm formation. </LI> <LI> Direct injection of QQ bacteria in a lab-scale RO system mitigated biofouling. </LI> <LI> QQ bacteria controlled biofouling when immobilized within a microfilter cartridge. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
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Advanced Treatment of Waste Water by Membranes
Fane, A G 한국물환경학회 1994 한국물환경학회지 Vol.10 No.3
Membrane technology offers many potential advantages for waste water treatment, including the ability to recover valuable materials and providing compact systems, readily scaled-up. This paper describes two large-scale membrane applications to waste water in Australia and discusses the development of several emerging technologies.
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흡착과 정밀여과의 혼성공정에 의한 페놀 제거에 관한 연구
이호원,김규진,Fane A. G. 한국막학회 1996 멤브레인 Vol.6 No.2
본 연구는 흡착과 막분리를 결합시킨 혼성 시스템을 폐수처리에 응용하기 위한 기초 연구로서, 페놀을 분말활성탄에 의해 흡착하고, 흡착된 페놀을 활성탄과 함께 정밀여과에 의해 분리하였다. 분말활성탄의 입자크기가 클수록 여과저항은 감소하였으며, 활성탄의 양이 적을수록 단절점(break point) 이전의 투과농도 변화율과 페놀 부하 변화율은 증가하였다. 분말활성탄의 입자크기가 작을수록 활성탄의 외표면적과 경막물질전달계수의 증가로 인해 단절점 전의 투과농도는 감소하였다. This work is a fundamental study for applying hybrid process coupling adsorption with microfiltration to waste-water treatment. Phenol was separated by adsorption on powdered activated carbon, adsorbed phenol with activated carbon was separated by microfiltration. As the particle size in suspension increased, filtration resistance decreased, and effect of particle concentration on resistance was less pronounced. The rate of uptake was greatly dependent on the degree of phenol loading. For a smaller amounts of activated carbon, the change of permeate concentration before break point and phenol loading with time were steeper than in the case of large amounts. Permeate concentration before break point decreased with decreasing particle size, this could be due to the increase of outer surface of particle and film mass transfer coefficient.
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