The effects of SRT, OLR and feed temperature on the performance of membrane bioreactor treating high strength municipal wastewater

The effects, of sludge retention time (SRT), feed temperature (Tf) and organic loading rate (OLR) on submerged membrane bioreactor (SMBR) performance were studied using hollow fibers (nominal pore size 0.4 μm) immersed in an aeration tank. A synthetic wastewater representative of high strength munic...

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Main Authors:	Birima, Ahmed Hussien, Megat Mohd Noor, Megat Johari, Mohammed , Ahmed Thamer, Idris, Azni, Muyibi, Suleyman Aremu, Nagaoka, H., Abdul Ghani, L.A.
Format:	Article
Language:	English
Published:	Desalination Publications 2009
Subjects:	TD159 Municipal engineering
Online Access:	http://irep.iium.edu.my/17711/ http://irep.iium.edu.my/17711/ http://irep.iium.edu.my/17711/1/DrAhmad720_Sept09.pdf

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recordtype	eprints
spelling	iium-177112012-02-14T01:46:33Z http://irep.iium.edu.my/17711/ The effects of SRT, OLR and feed temperature on the performance of membrane bioreactor treating high strength municipal wastewater Birima, Ahmed Hussien Megat Mohd Noor, Megat Johari Mohammed , Ahmed Thamer Idris, Azni Muyibi, Suleyman Aremu Nagaoka, H. Abdul Ghani, L.A. TD159 Municipal engineering The effects, of sludge retention time (SRT), feed temperature (Tf) and organic loading rate (OLR) on submerged membrane bioreactor (SMBR) performance were studied using hollow fibers (nominal pore size 0.4 μm) immersed in an aeration tank. A synthetic wastewater representative of high strength municipal wastewater was used in the study. Ten experimental runs were carried out using full factorial design with three factors and three levels (low, medium and high). These levels were 25, 30 and 35 days for SRT, 20, 30 and 40°C for Tf and 1.73, 4.03 and 6.82 kg COD/m3 d for OLR. Variation of OLR, SRT and Tf affected the biomass development significantly. The higher OLR trials resulted in higher MLVSS/MLSS ratio and also higher increasing rate of MLSS (d(MLSS)/ (dt)). For the low level OLR trials MLVSS/MLSS ratio varied between 75.3 and 82.3% and d(MLSS)/(dt) from 87.5 to 297.3 mg/l.d, whereas, for the high OLR trials they varied between 80.4 and 83.7% and 1355.4–2120.1 mg/l.d respectively. For the higher OLR, a higher aeration rate was applied to fulfill the DO demand. Therefore, for the low level OLR trials, the aeration rate and the DO were varied from 6 to 12 m3/m2 membrane area per hour and from 3.7 to 5.7 mg/l, respectively, whilst for the high OLR trials they varied from 6 to 18 m3/m2 membrane area/h and from 0.9 to 4.4 mg/l respectively. The permeate COD and NH3-N under different operating conditions varied from 0 to 32 mg/l, and from 0.004 to 0.856 mg/l, respectively. The interaction effects of SRT and Tf on COD removal efficiency was found to be insignificant. Increasing OLR did not affect COD removal. The optimum removal efficiency of ammonia nitrogen for the low and high strength wastewater was obtained at operating conditions of high SRT and low Tf. The pH increased significantly in the aeration tank and the increase was well correlated with the feed pH (r2 = 0.8336 for low OLR and 0.9106 for high OLR). Desalination Publications 2009-06 Article PeerReviewed application/pdf en http://irep.iium.edu.my/17711/1/DrAhmad720_Sept09.pdf Birima, Ahmed Hussien and Megat Mohd Noor, Megat Johari and Mohammed , Ahmed Thamer and Idris, Azni and Muyibi, Suleyman Aremu and Nagaoka, H. and Abdul Ghani, L.A. (2009) The effects of SRT, OLR and feed temperature on the performance of membrane bioreactor treating high strength municipal wastewater. Desalination and Water Treatment, 7. pp. 275-284. ISSN 1944-3994 / 1944-3986 http://www.deswater.com
repository_type	Digital Repository
institution_category	Local University
institution	International Islamic University Malaysia
building	IIUM Repository
collection	Online Access
language	English
topic	TD159 Municipal engineering
spellingShingle	TD159 Municipal engineering Birima, Ahmed Hussien Megat Mohd Noor, Megat Johari Mohammed , Ahmed Thamer Idris, Azni Muyibi, Suleyman Aremu Nagaoka, H. Abdul Ghani, L.A. The effects of SRT, OLR and feed temperature on the performance of membrane bioreactor treating high strength municipal wastewater
description	The effects, of sludge retention time (SRT), feed temperature (Tf) and organic loading rate (OLR) on submerged membrane bioreactor (SMBR) performance were studied using hollow fibers (nominal pore size 0.4 μm) immersed in an aeration tank. A synthetic wastewater representative of high strength municipal wastewater was used in the study. Ten experimental runs were carried out using full factorial design with three factors and three levels (low, medium and high). These levels were 25, 30 and 35 days for SRT, 20, 30 and 40°C for Tf and 1.73, 4.03 and 6.82 kg COD/m3 d for OLR. Variation of OLR, SRT and Tf affected the biomass development significantly. The higher OLR trials resulted in higher MLVSS/MLSS ratio and also higher increasing rate of MLSS (d(MLSS)/ (dt)). For the low level OLR trials MLVSS/MLSS ratio varied between 75.3 and 82.3% and d(MLSS)/(dt) from 87.5 to 297.3 mg/l.d, whereas, for the high OLR trials they varied between 80.4 and 83.7% and 1355.4–2120.1 mg/l.d respectively. For the higher OLR, a higher aeration rate was applied to fulfill the DO demand. Therefore, for the low level OLR trials, the aeration rate and the DO were varied from 6 to 12 m3/m2 membrane area per hour and from 3.7 to 5.7 mg/l, respectively, whilst for the high OLR trials they varied from 6 to 18 m3/m2 membrane area/h and from 0.9 to 4.4 mg/l respectively. The permeate COD and NH3-N under different operating conditions varied from 0 to 32 mg/l, and from 0.004 to 0.856 mg/l, respectively. The interaction effects of SRT and Tf on COD removal efficiency was found to be insignificant. Increasing OLR did not affect COD removal. The optimum removal efficiency of ammonia nitrogen for the low and high strength wastewater was obtained at operating conditions of high SRT and low Tf. The pH increased significantly in the aeration tank and the increase was well correlated with the feed pH (r2 = 0.8336 for low OLR and 0.9106 for high OLR).
format	Article
author	Birima, Ahmed Hussien Megat Mohd Noor, Megat Johari Mohammed , Ahmed Thamer Idris, Azni Muyibi, Suleyman Aremu Nagaoka, H. Abdul Ghani, L.A.
author_facet	Birima, Ahmed Hussien Megat Mohd Noor, Megat Johari Mohammed , Ahmed Thamer Idris, Azni Muyibi, Suleyman Aremu Nagaoka, H. Abdul Ghani, L.A.
author_sort	Birima, Ahmed Hussien
title	The effects of SRT, OLR and feed temperature on the performance of membrane bioreactor treating high strength municipal wastewater
title_short	The effects of SRT, OLR and feed temperature on the performance of membrane bioreactor treating high strength municipal wastewater
title_full	The effects of SRT, OLR and feed temperature on the performance of membrane bioreactor treating high strength municipal wastewater
title_fullStr	The effects of SRT, OLR and feed temperature on the performance of membrane bioreactor treating high strength municipal wastewater
title_full_unstemmed	The effects of SRT, OLR and feed temperature on the performance of membrane bioreactor treating high strength municipal wastewater
title_sort	effects of srt, olr and feed temperature on the performance of membrane bioreactor treating high strength municipal wastewater
publisher	Desalination Publications
publishDate	2009
url	http://irep.iium.edu.my/17711/ http://irep.iium.edu.my/17711/ http://irep.iium.edu.my/17711/1/DrAhmad720_Sept09.pdf
first_indexed	2023-09-18T20:26:41Z
last_indexed	2023-09-18T20:26:41Z
_version_	1777408464030531584

The effects of SRT, OLR and feed temperature on the performance of membrane bioreactor treating high strength municipal wastewater

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