Otimization studies on oxalic acid pretreatment of corn cob for production of hemicellulosic hydrolysate (2018)
- Authors:
- Autor USP: RODRIGUES, RITA DE CÁSSIA LACERDA BRAMBILLA - EEL
- Unidade: EEL
- Keywords: oxeatment; response surface methodology; corn cob hemicelulosic hydrolysate
- Agências de fomento:
- Language: Inglês
- Abstract: The corn crop has different quality standards depending on the use of the crop. Good plant nutrition will ensure high levels of protein and energy of the grains in the corn cob. Corn cob is one of the residues coming from the maize processing, which represents approximately 18 kg (70% wet basis) after processing 100 kg of maize. Corn cob is a lignocellulosic material composed by cellulose, hemicellulose and lignin. The cellulose and hemicellulose fractions after corn cob pretreatment can be converted to fermentable sugars to produce bioethanol of second generation. The hemicellulosic and lignin fractions can be almost totally removed from corn cob by using a mild chemical pretreatment process as oxalic acid. Oxalic acid can catalyze the hydrolysis of hemicellulose and cellulose directly. It is one of the strongest organic acids known, but at the same time, oxalic acid is less toxic to yeasts and other microbes. The aim of this work was to study the corn cob oxalic acid pretreatment to produce a hemicellulosic hydrolysate with high amount of sugars and low amount of toxic compound, as acetic acid. The pretreatment condition was based on a 23 full factorial design augmented with star design (six axial points) and three replicates in the central point by using a response surface methodology. Standardized corn cob pellets (1.5 kg dry matter) contained 10% moisture were impregnated under vacuum with different concentrations of oxalic acid solution (0,05-0,20 g/g dry material) in a semi-pilot reactor for 20min at room temperature. The solid:liquid ratio during impregnation was 1:6. The residue took up 15% of the liquid, and excess oxalic acid solution was drained away. The impregnated corn cob pellets were treated at different temperatures (120-180°C) and reaction times (10-90 min). The pretreated corn cob pellets were then washed to extract sugars and the different hemicellulosic hydrolysates were st
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ABNT
RODRIGUES, Rita de Cássia Lacerda Brambilla et al. Otimization studies on oxalic acid pretreatment of corn cob for production of hemicellulosic hydrolysate. 2018, Anais.. Sorocaba: UFSCar, 2018. Disponível em: https://i.bbcbrazil.com.br/arquivo/anais_bbcbrazil_2018.pdf. Acesso em: 29 dez. 2025. -
APA
Rodrigues, R. de C. L. B., Kenealy, W. R., Lee, J. W., & Jeffries, T. W. (2018). Otimization studies on oxalic acid pretreatment of corn cob for production of hemicellulosic hydrolysate. In Proceedings of the I Biomass and Bioenergy Conference - BBC Brazil 2018. Sorocaba: UFSCar. Recuperado de https://i.bbcbrazil.com.br/arquivo/anais_bbcbrazil_2018.pdf -
NLM
Rodrigues R de CLB, Kenealy WR, Lee JW, Jeffries TW. Otimization studies on oxalic acid pretreatment of corn cob for production of hemicellulosic hydrolysate [Internet]. Proceedings of the I Biomass and Bioenergy Conference - BBC Brazil 2018. 2018 ;[citado 2025 dez. 29 ] Available from: https://i.bbcbrazil.com.br/arquivo/anais_bbcbrazil_2018.pdf -
Vancouver
Rodrigues R de CLB, Kenealy WR, Lee JW, Jeffries TW. Otimization studies on oxalic acid pretreatment of corn cob for production of hemicellulosic hydrolysate [Internet]. Proceedings of the I Biomass and Bioenergy Conference - BBC Brazil 2018. 2018 ;[citado 2025 dez. 29 ] Available from: https://i.bbcbrazil.com.br/arquivo/anais_bbcbrazil_2018.pdf - Mead production using Red Star Montrachet and AWRI 976 strains of Saccharomyces cerevisiae
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