TITLE:
A Comparative Study on the Utilization of Corn Pericarp and Peanut Hull in the Production of Ethanol and the Impact on Food Economics
AUTHORS:
J. L. Herring, V. C. Narayanan
KEYWORDS:
Ethanol, Peanut Hull, Corn Pericarp, Alkaline Pretreatment, Fermentation
JOURNAL NAME:
Food and Nutrition Sciences,
Vol.7 No.11,
September
23,
2016
ABSTRACT: Corn pericarp and peanut hull (lignocellulosic materials) which are food industry
by-products were used as substrates in this study. Alkaline hydrogen peroxide (H2O2)
pretreatments at 0%, 2.5% and 5% were used for the removal of lignin. Simultaneous
Saccharification and Fermentation (SSF) and Separate Hydrolysis and Fermentation
(SHF) were conducted using Aspergillus niger (strain 201201) and Saccharomyces
cerevisiae (strain 26603). Aspergillus niger was added on day 1 to all samples with
inoculation treatments of S. cerevisiae at one-day intervals (A = Day 1, B = Day 2, C =
Day 3 and D = Day 4). Pretreatment with 2.5% H2O2 was more beneficial in the removal
of lignin for both substrates. Corn pericarp yielded an ethanol concentration
of 22.2 g/L in C and 21.78 g/L in D of 2.5% H2O2 pretreatment. Peanut hull with 2.5%
H2O2 pretreatment in D yielded a higher concentration at 10.38 g/L compared to
other inoculation treatments. The highest ethanol yielded on a percentage basis for
corn pericarp was 45.04% in C of 2.5% H2O2 pretreatment and 24.6% in D of 2.5%
H2O2 pretreatment for peanut hull.