Advanced Metabolic Engineering Approaches and Renewable Energy to Improve Environmental Benefits of Algal Biofuels: LCA of Large-scale Biobutanol Production with Cyanobacteria Synechocystis PCC6803
نویسندگان
چکیده
Abstract With modern genetic engineering tools, microorganisms can become resilient green cell factories to produce sustainable biofuels directly. Compared non-engineered algae and cyanobacteria, the photon conversion efficiency be significantly increased. Furthermore, simplified harvesting processes are feasible since novel excreting or their precursors continuously directly into cultivation media. Along with higher productivity direct product harvesting, it is expected that environmental benefits achieved, especially for climate protection. A life cycle assessment (LCA) biobutanol production genetically engineered cyanobacteria Synechocystis PCC6803 performed test this hypothesis. prospective upscaled approach was applied assess impacts at large-scale (20 ha plant) better comparability conventional butanol production. The LCA results show of improve impact, mainly due compared cyanobacteria. However, nevertheless high electricity demand required process overcompensates benefit. According scenario calculations, a more favourable gas balance achieved if renewable used. Then, greenhouse emissions reduced 3.1 kg CO 2 eq/kg biobutanol, corresponding 20% than fossil reference: (2.45 eq./kg 1-butanol). indicate importance energy transition towards supply take full advantage potential as future biofuel Besides, necessity developing different scenarios perspective fairer comparison mature reference technologies demonstrated.
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ژورنال
عنوان ژورنال: Bioenergy Research
سال: 2021
ISSN: ['1939-1234', '1939-1242']
DOI: https://doi.org/10.1007/s12155-021-10323-y