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Dual nutrient heterogeneity modes in a continuous flow photobioreactor for optimum nitrogen assimilation to produce microalgal biodiesel

The impact of different nitrogen sources on the microalga, Chlorella vulgaris, was studied in a newly developed microalgal-bacterial photobioreactor via a dual nutrient heterogeneity mode. The mechanisms of nitrogen transformation and valorisation were unveiled, and subsequently, optimized via dual...

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Main Authors: Leong, W.H., Kiatkittipong, W., Lam, M.K., Khoo, K.S., Show, P.L., Mohamad, M., Chong, S., Abdurrahman, M., Lim, J.W.
Format: Article
Published: Elsevier Ltd 2022
Online Access:https://www.scopus.com/inward/record.uri?eid=2-s2.0-85120639650&doi=10.1016%2fj.renene.2021.11.117&partnerID=40&md5=c9daf83d536280c8b27f8639e3e9f6c7
http://eprints.utp.edu.my/28918/
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spelling my.utp.eprints.289182022-03-16T08:43:17Z Dual nutrient heterogeneity modes in a continuous flow photobioreactor for optimum nitrogen assimilation to produce microalgal biodiesel Leong, W.H. Kiatkittipong, W. Lam, M.K. Khoo, K.S. Show, P.L. Mohamad, M. Chong, S. Abdurrahman, M. Lim, J.W. The impact of different nitrogen sources on the microalga, Chlorella vulgaris, was studied in a newly developed microalgal-bacterial photobioreactor via a dual nutrient heterogeneity mode. The mechanisms of nitrogen transformation and valorisation were unveiled, and subsequently, optimized via dual nutrient heterogeneity feeding modes comprising of various NH4+-N and NO3�-N concentrations. The nitrogen-assimilation mechanism from the microalgal-bacterial consortium was found to reduce microalgal growth inhibition, stemming at high NH4+-N concentrations. Accordingly, the total nitrogen removal efficiency was enhanced from 40.91 to 96.38 accompanied with maximum microalgal biomass production of up to 792 mg/L at a balanced or higher NH4+-N loading from mixed nitrogen environment. The harvested microalgal biomass contained high lipid accumulation of approximately 30 when fed with optimum NH4+-N and NO3�-N loadings at 60 and 58 mg/d, respectively. At this mixed nitrogen species loadings, high unsaturated fatty acid methyl esters (FAME) were attained. Indeed, the major FAME species (97�100) fell within the C16-18 range, signifying biodiesel characteristics conformity to the requirements for quality biodiesel application. Therefore, the dual heterogeneity modes of balanced NH4+-N and NO3�-N loadings into photobioreactor could offer effective microalgal nitrogen assimilation for sustainable wastewater treatment and microalgae-based biodiesel production simultaneously. © 2021 Elsevier Ltd Elsevier Ltd 2022 Article NonPeerReviewed https://www.scopus.com/inward/record.uri?eid=2-s2.0-85120639650&doi=10.1016%2fj.renene.2021.11.117&partnerID=40&md5=c9daf83d536280c8b27f8639e3e9f6c7 Leong, W.H. and Kiatkittipong, W. and Lam, M.K. and Khoo, K.S. and Show, P.L. and Mohamad, M. and Chong, S. and Abdurrahman, M. and Lim, J.W. (2022) Dual nutrient heterogeneity modes in a continuous flow photobioreactor for optimum nitrogen assimilation to produce microalgal biodiesel. Renewable Energy, 184 . pp. 443-451. http://eprints.utp.edu.my/28918/
institution Universiti Teknologi Petronas
building UTP Resource Centre
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Petronas
content_source UTP Institutional Repository
url_provider http://eprints.utp.edu.my/
description The impact of different nitrogen sources on the microalga, Chlorella vulgaris, was studied in a newly developed microalgal-bacterial photobioreactor via a dual nutrient heterogeneity mode. The mechanisms of nitrogen transformation and valorisation were unveiled, and subsequently, optimized via dual nutrient heterogeneity feeding modes comprising of various NH4+-N and NO3�-N concentrations. The nitrogen-assimilation mechanism from the microalgal-bacterial consortium was found to reduce microalgal growth inhibition, stemming at high NH4+-N concentrations. Accordingly, the total nitrogen removal efficiency was enhanced from 40.91 to 96.38 accompanied with maximum microalgal biomass production of up to 792 mg/L at a balanced or higher NH4+-N loading from mixed nitrogen environment. The harvested microalgal biomass contained high lipid accumulation of approximately 30 when fed with optimum NH4+-N and NO3�-N loadings at 60 and 58 mg/d, respectively. At this mixed nitrogen species loadings, high unsaturated fatty acid methyl esters (FAME) were attained. Indeed, the major FAME species (97�100) fell within the C16-18 range, signifying biodiesel characteristics conformity to the requirements for quality biodiesel application. Therefore, the dual heterogeneity modes of balanced NH4+-N and NO3�-N loadings into photobioreactor could offer effective microalgal nitrogen assimilation for sustainable wastewater treatment and microalgae-based biodiesel production simultaneously. © 2021 Elsevier Ltd
format Article
author Leong, W.H.
Kiatkittipong, W.
Lam, M.K.
Khoo, K.S.
Show, P.L.
Mohamad, M.
Chong, S.
Abdurrahman, M.
Lim, J.W.
spellingShingle Leong, W.H.
Kiatkittipong, W.
Lam, M.K.
Khoo, K.S.
Show, P.L.
Mohamad, M.
Chong, S.
Abdurrahman, M.
Lim, J.W.
Dual nutrient heterogeneity modes in a continuous flow photobioreactor for optimum nitrogen assimilation to produce microalgal biodiesel
author_facet Leong, W.H.
Kiatkittipong, W.
Lam, M.K.
Khoo, K.S.
Show, P.L.
Mohamad, M.
Chong, S.
Abdurrahman, M.
Lim, J.W.
author_sort Leong, W.H.
title Dual nutrient heterogeneity modes in a continuous flow photobioreactor for optimum nitrogen assimilation to produce microalgal biodiesel
title_short Dual nutrient heterogeneity modes in a continuous flow photobioreactor for optimum nitrogen assimilation to produce microalgal biodiesel
title_full Dual nutrient heterogeneity modes in a continuous flow photobioreactor for optimum nitrogen assimilation to produce microalgal biodiesel
title_fullStr Dual nutrient heterogeneity modes in a continuous flow photobioreactor for optimum nitrogen assimilation to produce microalgal biodiesel
title_full_unstemmed Dual nutrient heterogeneity modes in a continuous flow photobioreactor for optimum nitrogen assimilation to produce microalgal biodiesel
title_sort dual nutrient heterogeneity modes in a continuous flow photobioreactor for optimum nitrogen assimilation to produce microalgal biodiesel
publisher Elsevier Ltd
publishDate 2022
url https://www.scopus.com/inward/record.uri?eid=2-s2.0-85120639650&doi=10.1016%2fj.renene.2021.11.117&partnerID=40&md5=c9daf83d536280c8b27f8639e3e9f6c7
http://eprints.utp.edu.my/28918/
_version_ 1738656900980932608
score 13.211869

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