produção conjunta de fibras celulósicas e etanol a partir do bambu combined production of cellulosic fibers and ethanol from bamboo culm

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ID: 231637
1987
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Abstract
No presente estudo com Bambusa vulgaris Schrad., procurou-se desenvolver um novo processo de utilização do bambu, visando à produção conjunta de etanol e fibras celulósicas para papel. Os rendimentos em fibras celulósicas e etanol foram obtidos em função da idade do colmo (1, 3 e 5 anos) e região de amostragem em cada colmo (base, meio e ponta). Esses rendimentos, bem como outros relacionados com a fração fibrosa, glicose e amido, foram determinados com solução diluída de ácido sulfúrico. A densidade básica dos colmos foi determinada em cavacos antes do seu tratamento. Pelos resultados obtidos, é tecnicamente possível a produção conjunta de etanol e fibras celulósicas a partir do bambu. Os rendimentos em fibras celulósicas (46,85 a 56,04%) e etanol (12,77 a 14,79 litros/100 kg de cavacos) foram mais elevados nas regiões mediana e ponta dos colmos mais velhos. Essa mesma tendência foi observada para a glicose (teores de 22,80 a 26,41%) e amido hidrolisado (18,99 a 24,27%). O rendimento em fibras brutas ou fração fibrosa (69,35 a 76,35%) foi mais elevado nos cavacos provenientes dos colmos mais novos. A densidade básica dos cavacos não variou em função da idade do colmo (0,573 a 0,628 g/cm³), mas em função da região de amostragem (0,518 a 0,683 g/cm³), sendo mais densos os cavacos das regiões mediana e ponta dos colmos.
In this study with Bambusa vulgaris Schrad, a new process of bamboo utilization was established to produce cellulosic fibers for papermaking and ethanol. The yields of ethanol and cellulosic fibers were determined in function of culm age (1, 3 and 5 years) and portion of sampling in each culm (base, middle and top). The yields of cellulosic fibers, ethanol and compounds like glucose and starch were determined in shreddered chips after treatment with diluted sulphuric acid solution. The combined production of ethanol and cellulosic fibers was feasible technically. The yields of cellulosic fibers varied from 46.85 to 56.04% and ethanol from 12.77 to 14.79 liters/100 kg of chips. They were higher in the middle and top portions of the older culms. This trend was the same for glucose (22.80 to 26.41%) and starch (18.99 to 24.27%) contents. The fibrous fraction yield (69.35 to 76.35%) was higher in younger culms. The basic density of bamboo chips didn't vary in function of the culm age (0.573 to 0.628 g/cm³) but with the portion of sampling (0.518 to 0.683 g/cm³). The denser chips came from the middle and top portions of bamboo culms.
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azzini1987bragantiaproduo Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Anisio Azzini, Maria Carla Queiroz de Arruda, Irceu Ciaramello, Antônio Luiz de Barros Salgado, Mário Tomazello Filho
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Journal revista espanola de salud publica
Year 1987
DOI
10.1590/S0006-87051987000100003
URL
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051987000100003
Keywords
bamboo starch

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