Feasibility of bioethanol production from rice bran

Authors

DOI:

https://doi.org/10.5433/1679-0359.2020v41n6Supl2p2951

Keywords:

Enzymatic hydrolysis, Ultrasonic treatment, Protease, Response surface methodology, Alcoholic fermentation.

Abstract

Rice bran is a by-product of rice production with a high carbohydrate and starch content and the potential for bioethanol production by alcoholic fermentation. This article describes bioethanol production by Saccharomyces cerevisiae from hydrolyzed defatted rice bran (DRB) a rice by-product applying ultrasonic treatment and protease addition, as well as a sequential strategy of experimental design (SEED). In the first Central Composite Rotatable Design (CCRD), the temperature (25-30 °C) and inoculum concentration (0.5-50 g L-1) had positive effects on bioethanol production, while the effect of pH (4.0-6.0) was not significant. In the second CCRD, the temperature (28-35 °C) and inoculum concentration (10-70 g L-1) had negative and positive effects on bioethanol production (p < 0.05). Protease addition (15 µL g-1) increased the conversion of substrate into bioethanol by 76%. The optimized conditions for the production of 40.7 g L-1 bioethanol were a temperature of 31.5 °C and an inoculum concentration of 70 g L-1. Validation in a benchtop bioreactor produced 40.0 g L-1 of bioethanol from hydrolyzed DRB, and the SEED was characterized as a useful tool to improve bioethanol production from DRB. Furthermore, the DRB proved to be a by-product with great potential for bioethanol production, derived from alternative sources not commonly used in human food.

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Author Biographies

Francieli Begnini Siepmann, Universidade Tecnológica Federal do Paraná

Discente do Curso de Mestrado do Programa de Pós-Graduação em Tecnologia de Alimentos, Departamento de Alimentos, Universidade Tecnológica Federal do Paraná, UTFPR, Medianeira, PR, Brasil.

Daneysa Lahis Kalschne, Universidade Tecnológica Federal do Paraná

Pós-Doutoranda do Curso de Mestrado do Programa de Pós-Graduação em Tecnologia de Alimentos, Departamento de Alimentos, UTFPR, Medianeira, PR, Brasil.

Caroline Zabotti, Universidade Tecnológica Federal do Paraná

Discente do Curso de Graduação em Engenharia de Alimentos, Departamento de Alimentos, UTFPR, Medianeira, PR, Brasil.

Eder Lisandro de Moraes Flores, Universidade Tecnológica Federal do Paraná

Prof., Curso de Mestrado do Programa de Pós-Graduação em Tecnologias Ambientais, Departamento de Química, UTFPR, Medianeira, PR, Brasil.

Cristiane Canan, Universidade Tecnológica Federal do Paraná

Profa, Curso de Mestrado do Programa de Pós-Graduação em Tecnologia de Alimentos, Departamento de Alimentos, UTFPR, Medianeira, PR, Brasil.

Eliane Colla, Universidade Tecnológica Federal do Paraná

Profa, Curso de Mestrado do Programa de Pós-Graduação em Tecnologia de Alimentos, Departamento de Alimentos, UTFPR, Medianeira, PR, Brasil.

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Published

2020-11-06

How to Cite

Siepmann, F. B., Kalschne, D. L., Zabotti, C., Flores, E. L. de M., Canan, C., & Colla, E. (2020). Feasibility of bioethanol production from rice bran. Semina: Ciências Agrárias, 41(6Supl2), 2951–2966. https://doi.org/10.5433/1679-0359.2020v41n6Supl2p2951

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