Life Cycle Assessment of Microbial 2,3-Butanediol Production from Brewer’s Spent Grain Modeled on Pinch Technology

Maity, Sunil Kumar (2023) Life Cycle Assessment of Microbial 2,3-Butanediol Production from Brewer’s Spent Grain Modeled on Pinch Technology. ACS Sustainable Chemistry and Engineering, 11 (22). pp. 8271-8280. ISSN 2168-0485

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Microbial production of 2,3-butanediol (BDO) has received considerable attention as a promising alternate to fossil-derived BDO. In our previous work, BDO concentration >100 g/L was accumulated using brewer’s spent grain (BSG) via microbial routes which was followed by techno-economic analysis of the bioprocess. In the present work, a life cycle assessment (LCA) was conducted for BDO production from the fermentation of BSG to identify the associated environmental impacts. The LCA was based on an industrial-scale biorefinery processing of 100 metric tons BSG per day modeled using ASPEN plus integrated with pinch technology, a tool for achieving maximum thermal efficiency and heat recovery from the process. For the cradle-to-gate LCA, the functional unit of 1 kg of BDO production was selected. One-hundred-year global warming potential of 7.25 kg CO2/kg BDO was estimated while including biogenic carbon emission. The pretreatment stage followed by the cultivation and fermentation contributed to the maximum adverse impacts. Sensitivity analysis revealed that a reduction in electricity consumption and transportation and an increase in BDO yield could reduce the adverse impacts associated with microbial BDO production.

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IITH Creators:
IITH CreatorsORCiD
Maity, Sunil Kumar
Item Type: Article
Uncontrolled Keywords: 2,3-butanediol; biorefinery; brewer’s spent grain; global warming; life cycle assessment; sensitivity analysis; Economic analysis; Fermentation; Life cycle; Refining; Sensitivity analysis; Waste heat; 2,3-butanediol; Bioprocesses; Biorefineries; Brewer’s spend grain; Butanediol; Life cycle assessment; Microbial production; Pinch technology; Spent grains; Techno-Economic analysis; Global warming
Subjects: Chemical Engineering
Chemical Engineering > Technology of industrial chemicals
Chemical Engineering > Food and Beverage technology
Divisions: Department of Chemical Engineering
Depositing User: Mr Nigam Prasad Bisoyi
Date Deposited: 12 Nov 2023 10:06
Last Modified: 12 Nov 2023 10:06
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