Impact of various microalgal-bacterial populations on municipal wastewater bioremediation and its energy feasibility for lipid-based biofuel production

The microalgal-bacterial co-cultivation was adopted as an alternative in making microbial-based biofuel production to be more feasible in considering the economic and environmental prospects. Accordingly, the microalgal-bacterial symbiotic relationship was exploited to enhance the microbial biomass...

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Main Authors:	Leong, Wai Hong, Siti Nur Azella, Zaine, Ho, Yeek Chia, Uemura, Yoshimitsu, Lam, Man Kee, Khoo, Kuan Shiong, Kiatkittipong, Worapon, Cheng, C. K., Show, Pau Loke, Lim, Jun Wei
Format:	Article
Language:	English
Published:	Elsevier Ltd 2019
Subjects:	TP Chemical technology
Online Access:	http://umpir.ump.edu.my/id/eprint/26797/ http://umpir.ump.edu.my/id/eprint/26797/ http://umpir.ump.edu.my/id/eprint/26797/ http://umpir.ump.edu.my/id/eprint/26797/1/Impact%20of%20various%20microalgal-bacterial%20populations%20on%20municipal%20.pdf

id	ump-26797
recordtype	eprints
spelling	ump-267972020-03-12T08:25:39Z http://umpir.ump.edu.my/id/eprint/26797/ Impact of various microalgal-bacterial populations on municipal wastewater bioremediation and its energy feasibility for lipid-based biofuel production Leong, Wai Hong Siti Nur Azella, Zaine Ho, Yeek Chia Uemura, Yoshimitsu Lam, Man Kee Khoo, Kuan Shiong Kiatkittipong, Worapon Cheng, C. K. Show, Pau Loke Lim, Jun Wei TP Chemical technology The microalgal-bacterial co-cultivation was adopted as an alternative in making microbial-based biofuel production to be more feasible in considering the economic and environmental prospects. Accordingly, the microalgal-bacterial symbiotic relationship was exploited to enhance the microbial biomass yield, while bioremediating the nitrogen-rich municipal wastewater. An optimized inoculation ratio of microalgae and activated sludge (AS:MA) was predetermined and further optimization was performed in terms of different increment ratios to enhance the bioremediation process. The nitrogen removal was found accelerating with the increase of the increment ratios of inoculated AS:MA, though all the increment ratios had recorded a near complete total nitrogen removal (94–95%). In light of treatment efficiency and lipid production, the increment ratio of 0.5 was hailed as the best microbial population size in accounting the total nitrogen removal efficiency of 94.45%, while not compromising the lipid production of 0.241 g/L. Moreover, the cultures in municipal wastewater had attained higher biomass and lipid productions of 1.42 g/L and 0.242 g/L, respectively, as compared with the synthetic wastewater which were only 1.12 g/L (biomass yield) and 0.175 g/L (lipid yield). This was possibly due to the presence of trace elements which had contributed to the increase of biomass yield; thus, higher lipid attainability from the microalgal-bacterial culture. This synergistic microalgal-bacterial approach had been proven to be effective in treating wastewater, while also producing useful biomass for eventual lipid production with comparable net energy ratio (NER) value of 0.27, obtained from the life-cycle analysis (LCA) studies. Thereby, contributing towards long-term sustainability and possible commercialization of microbial-based biofuel production. Elsevier Ltd 2019-08-13 Article PeerReviewed pdf en http://umpir.ump.edu.my/id/eprint/26797/1/Impact%20of%20various%20microalgal-bacterial%20populations%20on%20municipal%20.pdf Leong, Wai Hong and Siti Nur Azella, Zaine and Ho, Yeek Chia and Uemura, Yoshimitsu and Lam, Man Kee and Khoo, Kuan Shiong and Kiatkittipong, Worapon and Cheng, C. K. and Show, Pau Loke and Lim, Jun Wei (2019) Impact of various microalgal-bacterial populations on municipal wastewater bioremediation and its energy feasibility for lipid-based biofuel production. Journal of Environmental Management, 249 (109384). pp. 1-7. ISSN 0301-4797 https://doi.org/10.1016/j.jenvman.2019.109384 https://doi.org/10.1016/j.jenvman.2019.109384
repository_type	Digital Repository
institution_category	Local University
institution	Universiti Malaysia Pahang
building	UMP Institutional Repository
collection	Online Access
language	English
topic	TP Chemical technology
spellingShingle	TP Chemical technology Leong, Wai Hong Siti Nur Azella, Zaine Ho, Yeek Chia Uemura, Yoshimitsu Lam, Man Kee Khoo, Kuan Shiong Kiatkittipong, Worapon Cheng, C. K. Show, Pau Loke Lim, Jun Wei Impact of various microalgal-bacterial populations on municipal wastewater bioremediation and its energy feasibility for lipid-based biofuel production
description	The microalgal-bacterial co-cultivation was adopted as an alternative in making microbial-based biofuel production to be more feasible in considering the economic and environmental prospects. Accordingly, the microalgal-bacterial symbiotic relationship was exploited to enhance the microbial biomass yield, while bioremediating the nitrogen-rich municipal wastewater. An optimized inoculation ratio of microalgae and activated sludge (AS:MA) was predetermined and further optimization was performed in terms of different increment ratios to enhance the bioremediation process. The nitrogen removal was found accelerating with the increase of the increment ratios of inoculated AS:MA, though all the increment ratios had recorded a near complete total nitrogen removal (94–95%). In light of treatment efficiency and lipid production, the increment ratio of 0.5 was hailed as the best microbial population size in accounting the total nitrogen removal efficiency of 94.45%, while not compromising the lipid production of 0.241 g/L. Moreover, the cultures in municipal wastewater had attained higher biomass and lipid productions of 1.42 g/L and 0.242 g/L, respectively, as compared with the synthetic wastewater which were only 1.12 g/L (biomass yield) and 0.175 g/L (lipid yield). This was possibly due to the presence of trace elements which had contributed to the increase of biomass yield; thus, higher lipid attainability from the microalgal-bacterial culture. This synergistic microalgal-bacterial approach had been proven to be effective in treating wastewater, while also producing useful biomass for eventual lipid production with comparable net energy ratio (NER) value of 0.27, obtained from the life-cycle analysis (LCA) studies. Thereby, contributing towards long-term sustainability and possible commercialization of microbial-based biofuel production.
format	Article
author	Leong, Wai Hong Siti Nur Azella, Zaine Ho, Yeek Chia Uemura, Yoshimitsu Lam, Man Kee Khoo, Kuan Shiong Kiatkittipong, Worapon Cheng, C. K. Show, Pau Loke Lim, Jun Wei
author_facet	Leong, Wai Hong Siti Nur Azella, Zaine Ho, Yeek Chia Uemura, Yoshimitsu Lam, Man Kee Khoo, Kuan Shiong Kiatkittipong, Worapon Cheng, C. K. Show, Pau Loke Lim, Jun Wei
author_sort	Leong, Wai Hong
title	Impact of various microalgal-bacterial populations on municipal wastewater bioremediation and its energy feasibility for lipid-based biofuel production
title_short	Impact of various microalgal-bacterial populations on municipal wastewater bioremediation and its energy feasibility for lipid-based biofuel production
title_full	Impact of various microalgal-bacterial populations on municipal wastewater bioremediation and its energy feasibility for lipid-based biofuel production
title_fullStr	Impact of various microalgal-bacterial populations on municipal wastewater bioremediation and its energy feasibility for lipid-based biofuel production
title_full_unstemmed	Impact of various microalgal-bacterial populations on municipal wastewater bioremediation and its energy feasibility for lipid-based biofuel production
title_sort	impact of various microalgal-bacterial populations on municipal wastewater bioremediation and its energy feasibility for lipid-based biofuel production
publisher	Elsevier Ltd
publishDate	2019
url	http://umpir.ump.edu.my/id/eprint/26797/ http://umpir.ump.edu.my/id/eprint/26797/ http://umpir.ump.edu.my/id/eprint/26797/ http://umpir.ump.edu.my/id/eprint/26797/1/Impact%20of%20various%20microalgal-bacterial%20populations%20on%20municipal%20.pdf
first_indexed	2023-09-18T22:41:57Z
last_indexed	2023-09-18T22:41:57Z
_version_	1777416973712359424

Impact of various microalgal-bacterial populations on municipal wastewater bioremediation and its energy feasibility for lipid-based biofuel production

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