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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Main Author: Ong, Chin Ee
Other Authors: Zhou Yan
Format: Final Year Project
Language:English
Published: 2016
Subjects:
Online Access:http://hdl.handle.net/10356/67488
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Institution: Nanyang Technological University
Language: English
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spelling 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
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic DRNTU::Engineering::Environmental engineering::Water treatment
spellingShingle DRNTU::Engineering::Environmental engineering::Water treatment
Ong, Chin Ee
Application of quorum quenching bacteria to membrane bioreactor for biofouling control
description 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.
author2 Zhou Yan
author_facet Zhou Yan
Ong, Chin Ee
format Final Year Project
author Ong, Chin Ee
author_sort 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
publishDate 2016
url http://hdl.handle.net/10356/67488
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