Towards microalgal triglycerides in the commodity marketsReportar como inadecuado




Towards microalgal triglycerides in the commodity markets - Descarga este documento en PDF. Documentación en PDF para descargar gratis. Disponible también para leer online.

Biotechnology for Biofuels

, 10:188

First Online: 17 July 2017Received: 19 April 2017Accepted: 11 July 2017

Abstract

BackgroundMicroalgal triglycerides TAGs hold great promise as sustainable feedstock for commodity industries. However, to determine research priorities and support business decisions, solid techno-economic studies are essential. Here, we present a techno-economic analysis of two-step TAG production growth reactors are operated in continuous mode such that multiple batch-operated stress reactors are inoculated and harvested sequentially for a 100-ha plant in southern Spain using vertically stacked tubular photobioreactors. The base case is established with outdoor pilot-scale data and based on current process technology.

ResultsFor the base case, production costs of 6.7 € per kg of biomass containing 24% TAG w-w were found. Several scenarios with reduced production costs were then presented based on the latest biological and technological advances. For instance, much effort should focus on increasing the photosynthetic efficiency during the stress and growth phases, as this is the most influential parameter on production costs 30 and 14% cost reduction from base case. Next, biological and technological solutions should be implemented for a reduction in cooling requirements 10 and 4.5% cost reduction from base case when active cooling is avoided and cooling setpoint is increased, respectively. When implementing all the suggested improvements, production costs can be decreased to 3.3 € per kg of biomass containing 60% TAG w-w within the next 8 years.

ConclusionsWith our techno-economic analysis, we indicated a roadmap for a substantial cost reduction. However, microalgal TAGs are not yet cost efficient when compared to their present market value. Cost-competiveness strictly relies on the valorization of the whole biomass components and on cheaper PBR designs e.g. plastic film flat panels. In particular, further research should focus on the development and commercialization of PBRs where active cooling is avoided and stable operating temperatures are maintained by the water basin in which the reactor is placed.

KeywordsMicroalgae Triglyceride production Techno-economic analysis Production costs Electronic supplementary materialThe online version of this article doi:10.1186-s13068-017-0873-2 contains supplementary material, which is available to authorized users.

Download fulltext PDF



Autor: Giulia Benvenuti - Jesús Ruiz - Packo P. Lamers - Rouke Bosma - René H. Wijffels - Maria J. Barbosa

Fuente: https://link.springer.com/



DESCARGAR PDF




Documentos relacionados