Title:
Bioethanol Production from Carob Pod by Solid Submerged Fermentation
Author(s):
Saharkhiz, S., Mazaheri, D., Shojaosadati, S.A., Rezvani, F.
Document(s):
Paper
Abstract:
Progressive depletion of conventional fossil fuels with increasing energy consumption and greenhouse gas (GHG) emissions have led to a move towards renewable and sustainable energy sources. There is a growing interest worldwide to find out new and cheap carbohydrate sources for production of bioethanol. In this context, carob pod (Ceratonia siliqua) is proposed as an economical source for bioethanol production, especially, in arid regions. Carob has been widely grown in the Mediterranean region. It has been regarded as only a forest tree and has been neglected for other economic benefits. In this research, ethanol production from carob pod using Zymomonas mobilis by solid submerged fermentation was studied. A central composite design was used to evaluate the effects of the main factors and their interactions on the ethanol production. The selected factors were as follows: the amount of bacterial inoculum, weight of carob, agitation rate (rpm), and fermentation time in nonhydrolyzed carob pod was investigated. The maximum ethanol of 0.42 g g-1 initial sugar was obtained at 30ºC, initial pH 5, using concentrations (g per 50 mL culture media) of: inoculum bacterial, 5%; amount of carob, 9 gr; rpm, 0; and culture time of 40 h. Overall, this study suggested that carob extract can be utilized for production of ethanol in order to meet the demands of renewable energy.
Keywords:
bioethanol, solid submerged fermentation, central composite design, carob pods, zymomonas mobilis
Topic:
Processes for Fuels from Biomass
Subtopic:
First generation liquid biofuels: alternative resources for innovative and efficient conversion
Event:
19th European Biomass Conference and Exhibition
Session:
OD2.2
Pages:
1913 - 1916
ISBN-13:
978-88-89407-55-4
ISBN-10:
88-89407-55-7
Paper DOI:
10.5071/19thEUBCE2011-OD2.2
Price:
FREE
