Application of quorum quenching bacteria to membrane bioreactor for biofouling control
Membrane bioreactor (MBR) is one of the widely-used wastewater treatment technologies, although biofouling remains as the biggest challenge, which can significantly decrease the efficiency of MBR. Solutions such as backwashing and air scouring are standard practices in industry; however, these measu...
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sg-ntu-dr.10356-674882023-03-03T17:08:39Z Application of quorum quenching bacteria to membrane bioreactor for biofouling control Ong, Chin Ee Zhou Yan School of Civil and Environmental Engineering Nanyang Environment and Water Research Institute DRNTU::Engineering::Environmental engineering::Water treatment Membrane bioreactor (MBR) is one of the widely-used wastewater treatment technologies, although biofouling remains as the biggest challenge, which can significantly decrease the efficiency of MBR. Solutions such as backwashing and air scouring are standard practices in industry; however, these measures are energy-intensive and decrease the productivity of MBR. Recently, regarding the quorum sensing (QS) signals, which trigger the formation of biofilm and thus resulting in biofouling, has been a topic of interest in controlling membrane biofouling. A promising solution is to apply quorum quenching (QQ) bacteria in MBR to control the biofouling. This report covers the feasibility study of applying QQ bacteria in lab-scale MBR. Two types of signalling molecules autoinducer-2 (AI-2) and N-acyl homoserine lactone (AHLs) were exploited in the experiment and compared. The results showed that it is possible to reduce biofilm formation by regulating the levels of AI-2 and AHLs level in the MBR. However, it was found out that the AI-2 regulating strains could not last longer than 3 to 4 days. Results also suggested that polysaccharides played an important role in the formation of biofilm which leads to biofouling. Bachelor of Engineering (Environmental Engineering) 2016-05-17T05:54:17Z 2016-05-17T05:54:17Z 2016 Final Year Project (FYP) http://hdl.handle.net/10356/67488 en Nanyang Technological University 39 p. application/pdf |
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DRNTU::Engineering::Environmental engineering::Water treatment Ong, Chin Ee Application of quorum quenching bacteria to membrane bioreactor for biofouling control |
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Membrane bioreactor (MBR) is one of the widely-used wastewater treatment technologies, although biofouling remains as the biggest challenge, which can significantly decrease the efficiency of MBR. Solutions such as backwashing and air scouring are standard practices in industry; however, these measures are energy-intensive and decrease the productivity of MBR.
Recently, regarding the quorum sensing (QS) signals, which trigger the formation of biofilm and thus resulting in biofouling, has been a topic of interest in controlling membrane biofouling. A promising solution is to apply quorum quenching (QQ) bacteria in MBR to control the biofouling.
This report covers the feasibility study of applying QQ bacteria in lab-scale MBR. Two types of signalling molecules autoinducer-2 (AI-2) and N-acyl homoserine lactone (AHLs) were exploited in the experiment and compared.
The results showed that it is possible to reduce biofilm formation by regulating the levels of AI-2 and AHLs level in the MBR. However, it was found out that the AI-2 regulating strains could not last longer than 3 to 4 days. Results also suggested that polysaccharides played an important role in the formation of biofilm which leads to biofouling. |
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Zhou Yan |
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Zhou Yan Ong, Chin Ee |
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Final Year Project |
author |
Ong, Chin Ee |
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Ong, Chin Ee |
title |
Application of quorum quenching bacteria to membrane bioreactor for biofouling control |
title_short |
Application of quorum quenching bacteria to membrane bioreactor for biofouling control |
title_full |
Application of quorum quenching bacteria to membrane bioreactor for biofouling control |
title_fullStr |
Application of quorum quenching bacteria to membrane bioreactor for biofouling control |
title_full_unstemmed |
Application of quorum quenching bacteria to membrane bioreactor for biofouling control |
title_sort |
application of quorum quenching bacteria to membrane bioreactor for biofouling control |
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2016 |
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http://hdl.handle.net/10356/67488 |
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