eprintid: 17818
rev_number: 2
eprint_status: archive
userid: 1
dir: disk0/00/01/78/18
datestamp: 2023-12-19 03:24:08
lastmod: 2023-12-19 03:24:08
status_changed: 2023-12-19 03:08:44
type: article
metadata_visibility: show
creators_name: Leong, W.H.
creators_name: Kiatkittipong, W.
creators_name: Lam, M.K.
creators_name: Khoo, K.S.
creators_name: Show, P.L.
creators_name: Mohamad, M.
creators_name: Chong, S.
creators_name: Abdurrahman, M.
creators_name: Lim, J.W.
title: Dual nutrient heterogeneity modes in a continuous flow photobioreactor for optimum nitrogen assimilation to produce microalgal biodiesel
ispublished: pub
keywords: Biodiesel; Microorganisms; Nitrogen removal; Nutrients; Photobioreactors; Unsaturated fatty acids; Wastewater treatment, Activated sludge; Continuous-flow; Fatty acids methyl esters; Microalga; Microalgal biodiesels; Microalgal biomass; NH 4 + N; Nitrogen assimilation; Nitrogen sources; Photobiore-actor, Microalgae, biofuel; biomass; fatty acid; heterogeneity; lipid; nutrient; valorization; wastewater; wastewater treatment, Bacteria (microorganisms); Chlorella vulgaris
note: cited By 29
abstract: 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
date: 2022
publisher: Elsevier Ltd
official_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
id_number: 10.1016/j.renene.2021.11.117
full_text_status: none
publication: Renewable Energy
volume: 184
pagerange: 443-451
refereed: TRUE
issn: 09601481
citation:   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.  ISSN 09601481