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Environmental impac...
Environmental impacts and limitations of third-generation biobutanol : Life cycle assessment of n-butanol produced by genetically engineered cyanobacteria
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- Nilsson, Astrid (författare)
- KTH,Skolan för kemi, bioteknologi och hälsa (CBH),Science for Life Laboratory, SciLifeLab
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- Shabestary, Kiyan (författare)
- KTH,Systembiologi,Science for Life Laboratory, SciLifeLab
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- Brandao, Miguel (författare)
- KTH,Hållbar utveckling, miljövetenskap och teknik
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- Hudson, Elton P. (författare)
- KTH,Science for Life Laboratory, SciLifeLab,Systembiologi
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(creator_code:org_t)
- 2019-04
- 2020
- Engelska.
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Ingår i: Journal of Industrial Ecology. - : WILEY. - 1088-1980 .- 1530-9290. ; 24:1
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Photosynthetic cyanobacteria have attracted interest as production organisms for third-generation biofuels, where sunlight and CO2 are used by microbes directly to synthesize fuel molecules. A particularly suitable biofuel is n-butanol, and there have been several laboratory reports of genetically engineered photosynthetic cyanobacteria capable of synthesizing and secreting n-butanol. This work evaluates the environmental impacts and cumulative energy demand (CED) of cyanobacteria-produced n-butanol through a cradle-to-grave consequential life cycle assessment (LCA). A hypothetical production plant in northern Sweden (area 1 ha, producing 5-85 m(3) n-butanol per year) was considered, and a range of cultivation formats and cellular productivity scenarios assessed. Depending on the scenario, greenhouse gas emissions (GHGe) ranged from 16.9 to 58.6 gCO(2)eq/MJ(BuOH) and the CED from 3.8 to 13 MJ/MJ(BuOH). Only with the assumption of a nearby paper mill to supply waste sources for heat and CO2 was the sustainability requirement of at least 60% GHGe savings compared to fossil fuels reached, though placement in northern Sweden reduced energy needed for reactor cooling. A high CED in all scenarios shows that significant metabolic engineering is necessary, such as a carbon partitioning of >90% to n-butanol, as well as improved light utilization, to begin to displace fossil fuels or even first- and second-generation bioethanol.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Naturresursteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Environmental Engineering (hsv//eng)
Nyckelord
- biofuel
- butanol
- cyanobacteria
- industrial ecology
- LCA
- metabolic engineering
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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