title: Improvement of the ethanol productivity in a high gravity brewing at pilot plant scale.
abstract: A 23 full factorial design was used to study the influence of different experimental variables, namely wort gravity, fermentation temperature and nutrient supplementation, on ethanol productivity from high gravity wort fermentation by Saccharomyces cerevisiae (lager strain), under pilot plant conditions. The highest ethanol productivity (0.69 g l(-1) h(-1)) was obtained at 20 degrees P [degrees P is the weight of extract (sugar) equivalent to the weight of sucrose in a 100 g solution at 20 degrees C], 15 degrees C, with the addition of 0.8% (w/v) yeast extract, 24 mg l(-1) ergosterol and 0.24% (v/v) Tween 80.
authors.affiliation: Department of Biotechnology, Faculty of Chemical Engineering of Lorena, Lorena-SP 12600-970, Brazil. gdragone@debiq.faenquil.br
authors.forename: Giuliano
authors.initials: G
authors.lastname: Dragone
authors.forename: Daniel P
authors.initials: DP
authors.lastname: Silva
authors.forename: João Batista
authors.initials: JB
authors.lastname: de Almeida e Silva
authors.forename: Urgel
authors.initials: U
authors.lastname: de Almeida Lima
mesh_terms: D018533:Biomass; D019149:Bioreactors; D003470:Culture Media; D000431:Ethanol / Q000378:metabolism*; D005285:Fermentation; D018471:Hypergravity; D007218:Industrial Microbiology; D012441:Saccharomyces cerevisiae / Q000254:growth & development* / Q000378:metabolism*; D013696:Temperature
chemical_list: D003470:Culture Media; D000431:Ethanol