Investigation of microfiltration performance of denitrifying granular sludge developed in sequencing batch reactors

Nitrogen-containing compounds released into the environment can create serious problems, such as water eutrophication, deterioration of water quality and potential hazard to human health. Biological nitrogen removal through two-stage nitrification and denitrification has thus been practiced for deca...

Full description

Saved in:
Bibliographic Details
Main Author: Liu, Yajuan
Other Authors: Sun Delai, Darren
Format: Theses and Dissertations
Language:English
Published: 2012
Subjects:
Online Access:https://hdl.handle.net/10356/48092
Tags: Add Tag
No Tags, Be the first to tag this record!
Institution: Nanyang Technological University
Language: English
id sg-ntu-dr.10356-48092
record_format dspace
spelling sg-ntu-dr.10356-480922023-03-03T19:27:28Z Investigation of microfiltration performance of denitrifying granular sludge developed in sequencing batch reactors Liu, Yajuan Sun Delai, Darren School of Civil and Environmental Engineering DRNTU::Engineering::Environmental engineering::Water treatment Nitrogen-containing compounds released into the environment can create serious problems, such as water eutrophication, deterioration of water quality and potential hazard to human health. Biological nitrogen removal through two-stage nitrification and denitrification has thus been practiced for decades. Bulking sludge in denitrification has often been reported. In order to overcome such problem, denitrifying membrane bioreactor (MBR) has drawn more and more attention. However, biofouling due to microbial attachment onto membrane surfaces remains a big challenge that in turn hinders further application of denitrifying MBR technology. The aims of this thesis were to look into denitrifying granular sludge MBR for effective control of biofouling, and further investigate the biofouling mechanism. For these purposes, the study was carried out in two parts: (i) development of denitrifying granular sludge at different cycle times of 4, 6 and 8 h and feed calcium concentrations of 0, 50 and 100 mg Ca2+/L, and (ii) investigation of fouling mechanisms of denitrifying granular sludge. It was found that a short cycle time could favor denitrifying granulation and helped improve the granules properties, such as size, settleability, strength and bioactivity, whereas a high calcium concentration could facilitate the formation of big size and dense denitrifying granules. Doctor of Philosophy (CEE) 2012-03-16T01:05:02Z 2012-03-16T01:05:02Z 2012 2012 Thesis Liu, Y. J. (2012). Investigation of microfiltration performance of denitrifying granular sludge developed in sequencing batch reactors. Doctoral thesis, Nanyang Technological University, Singapore. https://hdl.handle.net/10356/48092 10.32657/10356/48092 en 207 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
Liu, Yajuan
Investigation of microfiltration performance of denitrifying granular sludge developed in sequencing batch reactors
description Nitrogen-containing compounds released into the environment can create serious problems, such as water eutrophication, deterioration of water quality and potential hazard to human health. Biological nitrogen removal through two-stage nitrification and denitrification has thus been practiced for decades. Bulking sludge in denitrification has often been reported. In order to overcome such problem, denitrifying membrane bioreactor (MBR) has drawn more and more attention. However, biofouling due to microbial attachment onto membrane surfaces remains a big challenge that in turn hinders further application of denitrifying MBR technology. The aims of this thesis were to look into denitrifying granular sludge MBR for effective control of biofouling, and further investigate the biofouling mechanism. For these purposes, the study was carried out in two parts: (i) development of denitrifying granular sludge at different cycle times of 4, 6 and 8 h and feed calcium concentrations of 0, 50 and 100 mg Ca2+/L, and (ii) investigation of fouling mechanisms of denitrifying granular sludge. It was found that a short cycle time could favor denitrifying granulation and helped improve the granules properties, such as size, settleability, strength and bioactivity, whereas a high calcium concentration could facilitate the formation of big size and dense denitrifying granules.
author2 Sun Delai, Darren
author_facet Sun Delai, Darren
Liu, Yajuan
format Theses and Dissertations
author Liu, Yajuan
author_sort Liu, Yajuan
title Investigation of microfiltration performance of denitrifying granular sludge developed in sequencing batch reactors
title_short Investigation of microfiltration performance of denitrifying granular sludge developed in sequencing batch reactors
title_full Investigation of microfiltration performance of denitrifying granular sludge developed in sequencing batch reactors
title_fullStr Investigation of microfiltration performance of denitrifying granular sludge developed in sequencing batch reactors
title_full_unstemmed Investigation of microfiltration performance of denitrifying granular sludge developed in sequencing batch reactors
title_sort investigation of microfiltration performance of denitrifying granular sludge developed in sequencing batch reactors
publishDate 2012
url https://hdl.handle.net/10356/48092
_version_ 1759856565623455744