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Ethanol production by a Paenibacillus species isolated from an Icelandic hot spring - Production yields from complex biomass

Ethanol production by a Paenibacillus species isolated from an Icelandic hot spring - Production yields from complex biomass


Titill: Ethanol production by a Paenibacillus species isolated from an Icelandic hot spring - Production yields from complex biomass
Höfundur: Jessen, Jan Eric
Sveinsson, Thoroddur
Scully, Sean Michael
Orlygsson, Johann
Útgáfa: 2015
Tungumál: Enska
Umfang: 15-24
Háskóli/Stofnun: Háskólinn á Akureyri
University of Akureyri
Svið: Viðskipta- og raunvísindasvið (HA)
School of Business and Science (UA)
Deild: Auðlindadeild (HA)
Faculty of Natural Resource Sciences (UA)
Birtist í: Icelandic Agricultural Sciences;28
ISSN: 1670-567X
DOI: 10.16886/IAS.2015.02
Efnisorð: Bioethanol; Lignocellulosic biomass; Paenibacillus; Thermophiles
URI: https://hdl.handle.net/20.500.11815/131

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Tilvitnun:

Jessen, J. E., Sveinsson, T., Scully, S. M. & Orlygsson, J. (2015). Ethanol production by a paenibacillus species isolated from an icelandic hot spring - production yields from complex biomass. Icelandic Agricultural Sciences, 28, 15-24.

Útdráttur:

Ethanol production using Paenibacillus strain J2 was studied on carbohydrates and lignocellulosic biomass hydrolysates including grass (Phleum pratense) and barley straw (Hordeum vulgare). The strain has a broad substrate spectrum; fermentation of glucose yielded ethanol (major product), acetate, butyrate (minor), hydrogen, and carbon dioxide. At glucose concentrations below 30 mM fermentation was not inhibited. Higher substrate loadings resulted in decreased glucose utilization and a shift of end products towards butyrate. The maximum yields of ethanol were 1.45 mol ethanol mol glucose-1. The end products from lignocellulosic (4.5 g L-1 dw) biomass hydrolysates pretreated with 0.5% HCl or NaOH (control was unpretreated) prior to cellulase treatment were investigated. Ethanol production from cellulose hydrolysates without chemical pre-treatment yielded 5.5 mM ethanol g-1 with lower yields from paper and lignocellulosic biomasses (1.2-1.7 mM g-1). Ethanol production was enhanced by dilute acid or base pre-treatment combined with enzymatic treatment with the highest yields from grass (3.2 mM ethanol g-1).

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