Lookup NU author(s): Kamoru Salam,
Dr Sharon Velasquez Orta,
Professor Adam Harvey
This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).
This article reports a high yielding technique of synthesizing zirconium dodecyl sulphate (“ZDS”)for in situ transesterification of Nannochloropsis occulata and Chlorella vulgaris for fatty acid methylester (FAME) production. ZDS produced a significantly higher FAME yield in N. occulata thanin C. vulgaris (p = 0.008). The varying performance of ZDS in the two species could be due to theirdifferent cell wall chemistries. Sodium dodecyl sulphate (SDS) in H2SO4 for FAME enhancementfrom the two species was also studied. Treatment with SDS in H2SO4 increased the FAME productionrate in both species. Residual protein content after the in situ transesterification in C. vulgarisand N. occulata reduced respectively by 6.5% and 10%. The carbohydrate content was reduced by71% in C. vulgaris and 65% in N. occulata. The water tolerance of the process when using H2SO4,with or without SDS, was evaluated by hydrating the two species with 10% - 30% distilled water(w/w dry algae). The FAME concentration began to diminish only at 30% water content in bothspecies. Furthermore, the presence of a small amount of water in the biomass or methanol increasedthe lipid extraction efficiency, improving the FAME yield, rather than inhibiting the reaction.
Author(s): Salam KA, Velasquez-Orta SB, Harvey AP
Publication type: Article
Publication status: Published
Journal: Journal of Sustainable Bioenergy Systems
Print publication date: 01/06/2016
Online publication date: 06/05/2016
Acceptance date: 03/05/2016
ISSN (print): 2165-400X
ISSN (electronic): 2165-4018
Publisher: Scientific Research Publishing
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