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Advanced Metabolic Engineering Approaches and Renewable Energy to Improve Environmental Benefits of Algal Biofuels: LCA of Large-scale Biobutanol Production with Cyanobacteria Synechocystis PCC6803

Villacreses-Freire, Daniela; Ketzer, Franziska; Rösch, Christine

Abstract (englisch):
With modern genetic engineering tools, microorganisms can become resilient green cell factories to produce sustainable biofuels directly. Compared to non-engineered algae and cyanobacteria, the photon conversion efficiency can be significantly increased. Furthermore, simplified harvesting processes are feasible since the novel microorganisms are excreting the biofuels or their precursors continuously and directly into the cultivation media. Along with higher productivity and direct product harvesting, it is expected that environmental benefits can be achieved, especially for climate protection. A life cycle assessment (LCA) for biobutanol production with the genetically engineered cyanobacteria Synechocystis PCC6803 is performed to test this hypothesis. A prospective and upscaled approach was applied to assess the environmental impacts at large-scale production (20 ha plant) for better comparability with conventional butanol production. The LCA results show that the engineering of microorganisms can improve the environmental impact, mainly due to the higher productivity compared to non-engineered cyanobacteria. However, the nevertheless high electricity demand required for the cultivation and harvesting process overcompensates this benefit. ... mehr

Verlagsausgabe §
DOI: 10.5445/IR/1000138975
Veröffentlicht am 14.10.2021
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Technikfolgenabschätzung und Systemanalyse (ITAS)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2021
Sprache Englisch
Identifikator ISSN: 1939-1234, 1939-1242
KITopen-ID: 1000138975
HGF-Programm 37.11.02 (POF IV, LK 01) Societally-Feasible Transformation Pathways
Erschienen in BioEnergy research
Verlag Springer
Vorab online veröffentlicht am 13.10.2021
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