Techno-economic analysis of Scenedesmus dimorphus microalgae biorefinery scenarios for biodiesel production and glycerol valorization

In this work five biorefinery scenarios are proposed for the production of five different target products. Two of these scenarios included biodiesel production from Scenedesmus dimorphus microalgae biomass and glycerol valorization through bioconversion into dihydroxyacetone (DHA) with the bacteria...

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Bibliographic Details
Published in:Bioresource technology reports 2020-12, Vol.12, p.100605, Article 100605
Main Authors: Tejada Carbajal, Erick M., Martínez Hernández, Elías, Fernández Linares, Luis, Novelo Maldonado, Eberto, Limas Ballesteros, Roberto
Format: Article
Language:English
Subjects:
Glycerol valorization
Microalgae biorefinery
Reactive distillation
Scenedesmus dimorphus
Techno-economic analysis
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Summary:In this work five biorefinery scenarios are proposed for the production of five different target products. Two of these scenarios included biodiesel production from Scenedesmus dimorphus microalgae biomass and glycerol valorization through bioconversion into dihydroxyacetone (DHA) with the bacteria Gluconobacter oxydans. Experimental data of microalgae biomass composition were used as inputs to simulate reactive distillation column (RD) and continuously stirred tank reactor (CSTR) for microalgae oil transesterification stage. Optimum methanol/microalgae oil molar feed ratio, catalyst mass and reflux ratio were determined from simulated conditions with the Aspen Plus® V.10.0 Software. The biorefinery with the best economic performance integrated RD and glycerol valorization processes and achieved an internal rate of return (IRR) of 19.8%. The results showed that the combined use of reactive distillation (RD) with the biological oxidation of glycerol into DHA allows economically feasible biorefinery schemes using Scenedesmus dimorphus microalgae biomass as a feedstock. [Display omitted] •Techno-economic evaluation of microalgal biorefineries scenarios are presented.•Glycerol bioconversion process achieves a 97.3% dihydroxyacetone final purity.•Dihydroxyacetone obtention made microalgae biodiesel production profitable.•Microalgae oil highest reaction rates were achieved with reactive distillation.•Scenario with reactive distillation presented the best economic performance.
ISSN:2589-014X
2589-014X
DOI:10.1016/j.biteb.2020.100605