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Bioresour Technol

Title:		Carbon dioxide capture and use in photobioreactors: The role of the carbon dioxide loads in the carbon footprint
Author(s):		Depra MC; Dias RR; Severo IA; de Menezes CR; Zepka LQ; Jacob-Lopes E;
Address:		"Bioprocess Intensification Group, Federal University of Santa Maria, UFSM, Roraima Avenue 1000, 97105-900 Santa Maria, RS, Brazil. Electronic address: marianydepra@gmail.com. Bioprocess Intensification Group, Federal University of Santa Maria, UFSM, Roraima Avenue 1000, 97105-900 Santa Maria, RS, Brazil. Bioprocess Intensification Group, Federal University of Santa Maria, UFSM, Roraima Avenue 1000, 97105-900 Santa Maria, RS, Brazil. Electronic address: ejacoblopes@gmail.com"
Journal Title:		Bioresour Technol
Year:		2020
Volume:		20200626
Issue:
Page Number:		123745 -
DOI:		10.1016/j.biortech.2020.123745
ISSN/ISBN:		1873-2976 (Electronic) 0960-8524 (Linking)
Abstract:		"This research evaluated the carbon dioxide capture and use by Scenedesmus obliquus in a photobioreactor under different CO(2) loads. Performance indicators, carbon and energy balances, sustainability indicators, and carbon credits on the photobioreactor were assessed. The results expressed that the CO(2) loads of 384.9 kg/m(3)/d (15% CO(2)) provide the best trade-off for the process. For this condition, maximum biomass productivities of 0.36 kg/m(3)/d, carbon dioxide conversion rates of 0.44 kgCO(2)/m(3)/d, and oxygen release rates of 0.33 kgO(2)/m(3)/d were observed, reaching maximum CO(2) removal efficiencies of 30.76%. Volatile organic compounds were the major products generated (>80%). However, only <3% was fixed in biomass. From the environmental and economic point of view, the net energy ratio was 3.44, while the potential carbon credit was of 0.04 USD per m(3) of culture. Finally, the use of adequate CO(2) loads was also proven to be determinant to improve the global performance of the system"
Keywords:		Biomass Carbon Dioxide Carbon Footprint *Microalgae Photobioreactors *Scenedesmus Algae/chlorophyceae Bioconversion routes Carbon credits Carbon loads Life cycle assessment Mass balance;
Notes:		"MedlineDepra, Mariany C Dias, Rosangela R Severo, Ihana A de Menezes, Cristiano R Zepka, Leila Q Jacob-Lopes, Eduardo eng England 2020/07/12 Bioresour Technol. 2020 Oct; 314:123745. doi: 10.1016/j.biortech.2020.123745. Epub 2020 Jun 26"