Brasil | article

Simultaneous saccharification and fermentation of cactus pear biomass—evaluation of using different pretreatments

dc.creatorSantos, Everaldo Silvino dos
dc.creatorSouza Filho, Pedro Ferreira de
dc.creatorRibeiro, Vitor Troccoli
dc.creatorMacedo, Gorete Ribeiro de
dc.date2021-05-10T13:18:08Z
dc.date2021-05-10T13:18:08Z
dc.date2016-10-30
dc.identifierSOUZA FILHO, P.F.; RIBEIRO, V.T.; SANTOS, E. S.; MACEDO, G. R.. Simultaneous saccharification and fermentation of cactus pear biomass-evaluation of using different pretreatments. Industrial Crops and Products (Print), v. 89, p. 425-433, 2016. Disponivel em: https://www.sciencedirect.com/science/article/abs/pii/S092666901630348X?via%3Dihub. Acesso em: 10 maio 2021. https://doi.org/10.1016/j.indcrop.2016.05.028.
dc.identifier0926-6690
dc.identifierhttps://repositorio.ufrn.br/handle/123456789/32467
dc.identifier10.1016/j.indcrop.2016.05.028
dc.descriptionLignocellulosic biomasses of two species of cactus pear (Opuntia ficus indica and Nopalea cochenillifera) were tested for the production of ethanol. Their ability to grow in water-stressed regions makes them eligible for reducing the production cost of biofuels in drought regions. The biomass was pretreated using three different strategies: alkaline hydrogen peroxide, alkaline using NaOH, and acid using H2SO4 followed by alkaline delignification with NaOH. Analyses of the composition, crystallinity, and enzymatic hydrolysis were performed on the material before and after pretreatment. An experimental design was used to evaluate the influence of temperature and initial cellulose concentration on the process of simultaneous saccharification and fermentation (SSF) using the pretreated material, which showed the best performance in previous tests, and two strains of Saccharomyces cerevisiae (PE-2 and LNF CA-11). Biomass characterization showed a content of 31.55% cellulose, 17.12% hemicelluloses, and 10.25% lignins for N. cochenillifera and 34.86% cellulose, 19.97% hemicelluloses, and 15.72% lignins for O. ficus indica. The alkaline pretreatment provided the best enzymatic saccharification yields. The SSF experiments resulted in the greatest cellulose-to-ethanol yields using strain PE-2 with the pretreated N. cochenillifera (93.81%) at 40 ◦C and an initial cellulose concentration of 4%. N. cochenillifera showed better yields than O. ficus indica, and the PE-2 strain performed better than CA-11. These results suggest a good potential for cactus pear cladodes in the production of cellulosic ethanol
dc.languageen
dc.publisherIndustrial Crops and Products
dc.subjectCactus pear
dc.subjectEthanol
dc.subjectPretreatment
dc.subjectSSF
dc.subjectEnzymatic hydrolysis
dc.titleSimultaneous saccharification and fermentation of cactus pear biomass—evaluation of using different pretreatments
dc.typearticle


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