Biokinetics study on the effects of salinity and soluble microbial product (SMP)

The increasing use of membrane bioreactors (MBR) for treatment of wastewater has led to concerns for the contents of wastewater, quality of permeate and reduction of carbon foot prints. This study monitors the activity and performance of microorganisms in a forward osmosis membrane bioreactor (FOMBR...

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Main Author: Lim, Chai Yun.
Other Authors: Liu Yu
Format: Final Year Project
Language:English
Published: 2011
Subjects:
Online Access:http://hdl.handle.net/10356/45097
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-450972023-03-03T16:53:16Z Biokinetics study on the effects of salinity and soluble microbial product (SMP) Lim, Chai Yun. Liu Yu School of Civil and Environmental Engineering DRNTU::Engineering::Environmental engineering::Water treatment The increasing use of membrane bioreactors (MBR) for treatment of wastewater has led to concerns for the contents of wastewater, quality of permeate and reduction of carbon foot prints. This study monitors the activity and performance of microorganisms in a forward osmosis membrane bioreactor (FOMBR) under high salinity and investigates the possible influence of soluble microbial products (SMP) on the system. Batch test were carried out on three conditions, namely fresh water, SMP and salt conditions with microorganisms from the FOMBR and a bioreactor without saline condition. The SMP was collected from the supernatant of the FOMBR. It is observed that salt and SMP did show inhibition effects in term of substrate removal efficiency, growth rates, floc size and specific oxygen uptake rate. With fresh water conditions, the substrate removal efficiency of 86.1% and initial specific growth rate of 6.84d-1 was reported with Source, a bioreactor without saline condition whereas the FOMBR achieved only 51.9% with specific growth rate of 1.53d-1. The substrate removal efficiency and specific growth rate decrease with SMP and salt conditions for Source despite acclimation with salt to a concentration of about 10-15g/L. Floc size was monitored to have small changes with time in all conditions however the changes were not significant. The specific oxygen uptake rate can be correlated to the removal efficiency and specific growth rate for Source but not with FOMBR. It is suspected that microorganisms do have feedback mechanisms and ‘recognizes’ its own SMP. Bachelor of Engineering (Environmental Engineering) 2011-06-09T02:26:04Z 2011-06-09T02:26:04Z 2011 2011 Final Year Project (FYP) http://hdl.handle.net/10356/45097 en Nanyang Technological University 60 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
Lim, Chai Yun.
Biokinetics study on the effects of salinity and soluble microbial product (SMP)
description The increasing use of membrane bioreactors (MBR) for treatment of wastewater has led to concerns for the contents of wastewater, quality of permeate and reduction of carbon foot prints. This study monitors the activity and performance of microorganisms in a forward osmosis membrane bioreactor (FOMBR) under high salinity and investigates the possible influence of soluble microbial products (SMP) on the system. Batch test were carried out on three conditions, namely fresh water, SMP and salt conditions with microorganisms from the FOMBR and a bioreactor without saline condition. The SMP was collected from the supernatant of the FOMBR. It is observed that salt and SMP did show inhibition effects in term of substrate removal efficiency, growth rates, floc size and specific oxygen uptake rate. With fresh water conditions, the substrate removal efficiency of 86.1% and initial specific growth rate of 6.84d-1 was reported with Source, a bioreactor without saline condition whereas the FOMBR achieved only 51.9% with specific growth rate of 1.53d-1. The substrate removal efficiency and specific growth rate decrease with SMP and salt conditions for Source despite acclimation with salt to a concentration of about 10-15g/L. Floc size was monitored to have small changes with time in all conditions however the changes were not significant. The specific oxygen uptake rate can be correlated to the removal efficiency and specific growth rate for Source but not with FOMBR. It is suspected that microorganisms do have feedback mechanisms and ‘recognizes’ its own SMP.
author2 Liu Yu
author_facet Liu Yu
Lim, Chai Yun.
format Final Year Project
author Lim, Chai Yun.
author_sort Lim, Chai Yun.
title Biokinetics study on the effects of salinity and soluble microbial product (SMP)
title_short Biokinetics study on the effects of salinity and soluble microbial product (SMP)
title_full Biokinetics study on the effects of salinity and soluble microbial product (SMP)
title_fullStr Biokinetics study on the effects of salinity and soluble microbial product (SMP)
title_full_unstemmed Biokinetics study on the effects of salinity and soluble microbial product (SMP)
title_sort biokinetics study on the effects of salinity and soluble microbial product (smp)
publishDate 2011
url http://hdl.handle.net/10356/45097
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