Title:
Pilot-Scale Ethanol Production from Lignocellulosic Biomass at High Solid Loading
Author(s):
Amaya-Delgado, L., Leyva-Uriostegui, J.C., Sanchez, A.
Document(s):
Paper
Abstract:
Lignocellulosic ethanol production involves three bottleneck steps, pretreatment, saccharification, and fermentation. Many efforts have been carried out to increase ethanol production by developing strategies to resolve these bottleneck steps; however, the main efforts had been at the laboratory scale. In this work, we tested and adapted a strategy previously developed at the laboratory level to reach high solid loadings (20%) in enzymatic saccharification, the quick fed-batch saccharification (QFBs). This work is the first attempt to scale up the high solid loading strategy and produce lignocellulosic ethanol at 250 L bioreactor from corn stover (CS), barley straw (BS), and wheat straw (WS) as biomasses. The saccharification yield reached were 80.2, 60.6, and 57.3% for BS, WS, and CS, respectively. After fermentation, the final ethanol concentrations were 21.5, 27.3, and 23.9 g/L, corresponding to volumetric ethanol productivities of 1.1, 1.0, 1.2 g/Lhfor CS, WS, and BS, respectively. Finally, the results demonstrated that the QFBs evaluated in this work could improve the hydrolysis yields and, consequently, volumetric bioethanol productivities at a large scale. However, the bottleneck is still in the saccharification stage, so it must be improved to achieve maximum ethanol productions.
Keywords:
enzymatic hydrolysis, ethanol, fermentation, lignocellulosic sources
Topic:
Biomass Conversion to Intermediate Bioenergy Carriers, Sustainable Biofuels and Bio-Based Products
Subtopic:
Bio-Alcohols from Sugars, Starch and Lignocellulosic Biomass
Event:
29th European Biomass Conference and Exhibition
Session:
3BO.14.4
Pages:
745 - 747
ISBN:
978-88-89407-21-9
Paper DOI:
10.5071/29thEUBCE2021-3BO.14.4
Price:
FREE
