Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/72109
Title: Responses of microorganisms to on-line chemical cleaning with sodium hypochlorite in membrane bioreactor
Authors: Cai, Weiwei
Keywords: DRNTU::Engineering::Environmental engineering::Water treatment
Issue Date: 2017
Source: Cai, W. (2017). Responses of microorganisms to on-line chemical cleaning with sodium hypochlorite in membrane bioreactor. Doctoral thesis, Nanyang Technological University, Singapore.
Abstract: On-line chemical cleaning with sodium hypochlorite (NaClO) has been commonly employed for maintaining a constant permeability in membrane bioreactor (MBR), during which activated sludge is inevitably exposed to NaClO. However, little information is currently available about the potential effects of NaClO on microorganisms in such a prevalent practice. This study, therefore, aims to investigate the diverse responses of microorganisms to NaClO at various dosages. Significant enhancement of microbial adherence on membrane surface was observed upon the exposure of microorganisms to NaClO, whereby the possible mechanism behind was also proposed. Meanwhile, substantial amount of dissolved organic matter (DOM) and halogenated byproducts were released into the liquid phase due to NaClO triggered bacterial lysis. Moreover, these emerging DOM and byproducts were further characterized, while their fate in MBR was also determined. Consequently, this study provides new insights into the current practice of on-line chemical cleaning with NaClO, and sheds lights on its potential negative impacts on MBR performance.
URI: http://hdl.handle.net/10356/72109
DOI: 10.32657/10356/72109
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:CEE Theses

Files in This Item:
File Description SizeFormat 
Thesis.pdf6.44 MBAdobe PDFThumbnail
View/Open

Page view(s)

166
Updated on May 13, 2021

Download(s) 50

38
Updated on May 13, 2021

Google ScholarTM

Check

Altmetric


Plumx

Items in DR-NTU are protected by copyright, with all rights reserved, unless otherwise indicated.