Ethanol production from cotton gin trash using optimised dilute acid pretreatment and whole slurry fermentation processes
In: Bioresource technology, Jg. 173 (2014-07-29)
Online
unknown
Zugriff:
Cotton ginning trash (CGT) collected from Australian cotton gins was evaluated for bioethanol production. CGT composition varied between ginning operations and contained high levels of extractives (26-28%), acid-insoluble material (17-22%) and holocellulose (42-50%). Pretreatment conditions of time (4-20 min), temperature (160-220 °C) and sulfuric acid concentration (0-2%) were optimised using a central composite design. Response surface modelling revealed that CGT fibre pretreated at 180 °C in 0.8% H2SO4 for 12 min was optimal for maximising enzymatic glucose recoveries and achieved yields of 89% theoretical, whilst the total accumulated levels of furans and acetic acid remained relatively low at1 and 2 g/L respectively. Response surface modelling also estimated maximum xylose recovery in pretreated liquors (87% theoretical) under the set conditions of 150 °C in 1.9% H2SO4 for 23.8 min. Yeast fermentations yielded high ethanol titres of 85%, 88% and 70% theoretical from glucose generated from: (a) enzymatic hydrolysis of washed pretreated fibres, (b) enzymatic hydrolysis of whole pretreated slurries and (c) simultaneous saccharification fermentations, respectively.
Titel: |
Ethanol production from cotton gin trash using optimised dilute acid pretreatment and whole slurry fermentation processes
|
---|---|
Autor/in / Beteiligte Person: | Palmer, J. ; McIntosh, Shane ; Morris, Stephen ; Vancov, Tony |
Link: | |
Zeitschrift: | Bioresource technology, Jg. 173 (2014-07-29) |
Veröffentlichung: | 2014 |
Medientyp: | unknown |
ISSN: | 1873-2976 (print) |
Schlagwort: |
|
Sonstiges: |
|