TY - JOUR

T1 - Integration of Corn and Cane for Ethanol Production

T2 - Effects of Lactobacilli Contamination on Fermentative Parameters and Use of Ionizing Radiation Treatment for Disinfection

AU - Silva, Ana Paula Maria da

AU - Sica, Pietro

AU - Pires, Lucas de Almeida Nobre

AU - Spironello, Liandra

AU - Mota, Layna Amorim

AU - Peixoto, Gustavo Theodoro

AU - Calegari, Rubens Perez

AU - Basso, Thiago Olitta

AU - Tonso, Aldo

AU - Gomes, Marcelo Pego

AU - Somessari, Samir Luiz

AU - Duarte, Heitor Gameiro

AU - Somessari, Elizabeth S.Ribeiro

AU - Carvalho, Renan de Souza

AU - Baptista, Antonio Sampaio

N1 - Publisher Copyright: © 2023 by the authors.

PY - 2023

Y1 - 2023

N2 - Recently, in Brazil, corn ethanol industries are being installed and the integration with sugar/energy-cane has been proposed, using bagasse for cogeneration and the juice to dilute the corn. However, this integration may have some limitations, such as the quality of the cane juice and potential contamination by microorganisms brought with the cane from the field. In this article, we first tested the effects of mixing energy cane juice with corn on fermentative parameters. We also assessed the effects of Lactobacilli. contamination on organic acids produced during the fermentation and fermentation parameters and proposed the use of ionizing radiation to replace antibiotics as a disinfection control method. Our results showed that mixing energy cane juice with corn does not have any negative effect on fermentation parameters, including ethanol production. The contamination with Lactobacilli. considerably increased the production of acetic, lactic, and succinic acid, reducing the pH and ethanol content from 89.2 g L−1 in the sterilized treatment to 72.9 g L−1 in the contaminated treatment. Therefore, for the integration between corn and cane to be applied on an industrial scale, it is essential to have effective disinfection before fermentation. Ionizing radiation (20 kGy) virtually disinfected the wort, showing itself to be a promising technology; however, an economic viability study for adopting it in the industry should be carried out.

AB - Recently, in Brazil, corn ethanol industries are being installed and the integration with sugar/energy-cane has been proposed, using bagasse for cogeneration and the juice to dilute the corn. However, this integration may have some limitations, such as the quality of the cane juice and potential contamination by microorganisms brought with the cane from the field. In this article, we first tested the effects of mixing energy cane juice with corn on fermentative parameters. We also assessed the effects of Lactobacilli. contamination on organic acids produced during the fermentation and fermentation parameters and proposed the use of ionizing radiation to replace antibiotics as a disinfection control method. Our results showed that mixing energy cane juice with corn does not have any negative effect on fermentation parameters, including ethanol production. The contamination with Lactobacilli. considerably increased the production of acetic, lactic, and succinic acid, reducing the pH and ethanol content from 89.2 g L−1 in the sterilized treatment to 72.9 g L−1 in the contaminated treatment. Therefore, for the integration between corn and cane to be applied on an industrial scale, it is essential to have effective disinfection before fermentation. Ionizing radiation (20 kGy) virtually disinfected the wort, showing itself to be a promising technology; however, an economic viability study for adopting it in the industry should be carried out.

KW - antibiotics replacement

KW - biofuels

KW - biomass

KW - biorefinery

KW - sustainability

U2 - 10.3390/fermentation9020089

DO - 10.3390/fermentation9020089

M3 - Journal article

AN - SCOPUS:85148749954

VL - 9

JO - Fermentation

JF - Fermentation

SN - 2311-5637

IS - 2

M1 - 89

ER -