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Microbial Lipid Accumulation through Bioremediation of Palm Oil Mill Wastewater by Bacillus cereus

The wastewater burden and increased energy demands have spurred interest in finding possible solutions that could concomitantly address both issues. Microbial lipid production, together with the bioremediation of wastewater, could be a promising solution to address both problems. In this context, th...

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Main Authors:	Karim, Ahasanul, Islam, M. Amirul, Yousuf, Abu, Khan, Maksudur R., C. K. M., Faizal
Format:	Article
Published:	ACS Publications 2019
Subjects:	TP Chemical technology
Online Access:	http://umpir.ump.edu.my/id/eprint/28516/ https://doi.org/10.1021/acssuschemeng.9b01960
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spelling	my.ump.umpir.285162020-06-19T05:38:19Z http://umpir.ump.edu.my/id/eprint/28516/ Microbial Lipid Accumulation through Bioremediation of Palm Oil Mill Wastewater by Bacillus cereus Karim, Ahasanul Islam, M. Amirul Yousuf, Abu Khan, Maksudur R. C. K. M., Faizal TP Chemical technology The wastewater burden and increased energy demands have spurred interest in finding possible solutions that could concomitantly address both issues. Microbial lipid production, together with the bioremediation of wastewater, could be a promising solution to address both problems. In this context, the present study was designed to evaluate the potential of Bacillus cereus (B. cereus) for accumulating microbial lipids through the bioremediation of palm oil mill effluent (POME) in batch mode fermentation. Different dilutions of POME media (25%, 50%, 75%, and 100%) were used to determine the optimum POME concentration for enabling the maximum yield of biomass and maximum lipid production. The 50% (v/v) POME was found to have potential for the highest biomass growth (8.09 g/L) and lipid accumulation (1.46 g/L), with a lipid content of 18.04% (dry weight basis). B. cereus accumulated a higher biomass and lipid content than other bacterial strains, such as Rhodococcus opacus and Pseudomonas aeruginosa, under similar conditions. On the other hand, the degree of bioremediation was assessed by evaluating several wastewater parameters and determining the seed germination index (GI) of Vigna radiata. POME treated with B. cereus displayed higher GI values than the untreated samples due to the significant remediation of detrimental organics present in the POME. This finding was further confirmed by the substantial reduction in pollution load, particularly in chemical oxygen demand (COD) and biochemical oxygen demand (BOD) for 50% POME, thus demonstrating removal efficiencies of 79.35% and 72.65%, respectively. Therefore, the results of this study suggest that B. cereus cultivation in POME could be a promising technique for attaining higher biomass growth and lipid production in conjunction with the bioremediation of POME. The approach of achieving dual objectives that is utilized in the present study provides a novel strategy for palm oil millers. ACS Publications 2019 Article PeerReviewed Karim, Ahasanul and Islam, M. Amirul and Yousuf, Abu and Khan, Maksudur R. and C. K. M., Faizal (2019) Microbial Lipid Accumulation through Bioremediation of Palm Oil Mill Wastewater by Bacillus cereus. ACS Sustainable Chemistry & Engineering, 7 (17). pp. 14500-14508. ISSN 2168-0485 https://doi.org/10.1021/acssuschemeng.9b01960
institution	Universiti Malaysia Pahang
building	UMP Library
collection	Institutional Repository
continent	Asia
country	Malaysia
content_provider	Universiti Malaysia Pahang
content_source	UMP Institutional Repository
url_provider	http://umpir.ump.edu.my/
topic	TP Chemical technology
spellingShingle	TP Chemical technology Karim, Ahasanul Islam, M. Amirul Yousuf, Abu Khan, Maksudur R. C. K. M., Faizal Microbial Lipid Accumulation through Bioremediation of Palm Oil Mill Wastewater by Bacillus cereus
description	The wastewater burden and increased energy demands have spurred interest in finding possible solutions that could concomitantly address both issues. Microbial lipid production, together with the bioremediation of wastewater, could be a promising solution to address both problems. In this context, the present study was designed to evaluate the potential of Bacillus cereus (B. cereus) for accumulating microbial lipids through the bioremediation of palm oil mill effluent (POME) in batch mode fermentation. Different dilutions of POME media (25%, 50%, 75%, and 100%) were used to determine the optimum POME concentration for enabling the maximum yield of biomass and maximum lipid production. The 50% (v/v) POME was found to have potential for the highest biomass growth (8.09 g/L) and lipid accumulation (1.46 g/L), with a lipid content of 18.04% (dry weight basis). B. cereus accumulated a higher biomass and lipid content than other bacterial strains, such as Rhodococcus opacus and Pseudomonas aeruginosa, under similar conditions. On the other hand, the degree of bioremediation was assessed by evaluating several wastewater parameters and determining the seed germination index (GI) of Vigna radiata. POME treated with B. cereus displayed higher GI values than the untreated samples due to the significant remediation of detrimental organics present in the POME. This finding was further confirmed by the substantial reduction in pollution load, particularly in chemical oxygen demand (COD) and biochemical oxygen demand (BOD) for 50% POME, thus demonstrating removal efficiencies of 79.35% and 72.65%, respectively. Therefore, the results of this study suggest that B. cereus cultivation in POME could be a promising technique for attaining higher biomass growth and lipid production in conjunction with the bioremediation of POME. The approach of achieving dual objectives that is utilized in the present study provides a novel strategy for palm oil millers.
format	Article
author	Karim, Ahasanul Islam, M. Amirul Yousuf, Abu Khan, Maksudur R. C. K. M., Faizal
author_facet	Karim, Ahasanul Islam, M. Amirul Yousuf, Abu Khan, Maksudur R. C. K. M., Faizal
author_sort	Karim, Ahasanul
title	Microbial Lipid Accumulation through Bioremediation of Palm Oil Mill Wastewater by Bacillus cereus
title_short	Microbial Lipid Accumulation through Bioremediation of Palm Oil Mill Wastewater by Bacillus cereus
title_full	Microbial Lipid Accumulation through Bioremediation of Palm Oil Mill Wastewater by Bacillus cereus
title_fullStr	Microbial Lipid Accumulation through Bioremediation of Palm Oil Mill Wastewater by Bacillus cereus
title_full_unstemmed	Microbial Lipid Accumulation through Bioremediation of Palm Oil Mill Wastewater by Bacillus cereus
title_sort	microbial lipid accumulation through bioremediation of palm oil mill wastewater by bacillus cereus
publisher	ACS Publications
publishDate	2019
url	http://umpir.ump.edu.my/id/eprint/28516/ https://doi.org/10.1021/acssuschemeng.9b01960
_version_	1672610902054010880
score	13.211869

Microbial Lipid Accumulation through Bioremediation of Palm Oil Mill Wastewater by Bacillus cereus

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