Produção de hidrolisados e fibras a partir de resíduo da industrialização da mandioca submetido a pré-tratamento hidrotérmico
Carregando...
Data
2005-04-28
Autores
Saito, Irene Miuki [UNESP]
Título da Revista
ISSN da Revista
Título de Volume
Editor
Universidade Estadual Paulista (Unesp)
Resumo
Recentemente há uma crescente busca de maior utilização de resíduos agroindustriais visando recuperar substâncias e/ou materiais e deste modo aumentar a eficiência econômica dos processos de produção. Diversos processos são desenvolvidos para utilização desses materiais convergindo em compostos químicos e produtos finos. A aplicação de resíduos agroindustriais em bioprocessos é uma alternativa observada na forma de substratos, e uma ajuda para solucionar o problema da poluição nos processos de agroindustrialização. O farelo de mandioca é um resíduo sólido produzido nas agroindústrias que extraem o seu amido (fecularias) que contém alto teor de amido (60 a 70% em peso seco) que é descartado e causa problemas ao meio ambiente. A recuperação do amido residual por tratamento físico ou biológico do material que tem sido objeto de pesquisas visando a melhoria dos processos, com o objetivo de agregar valor à matéria prima consumida. A produção de fécula de mandioca gera cerca de 930 Kg de farelo com aproximadamente 85% de umidade para cada 1000 Kg de raiz processada apresentando uma concentração de amido residual de 60 a 75% em massa seca. A fim de se obter um melhor aproveitamento do amido residuário existente no farelo de mandioca, o presente trabalho desenvolveu uma metodologia adequada para produção de hidrolisado, rico em glicose originário de tratamento hidrotérmico com fluido subcrítico. O tratamento do farelo residuário originário de uma agroindústria com umidade de 85% foi realizado em reator agitado em bateladas de 2,0 Kg, utilizando como catalisador o ácido sulfúrico a temperatura de 140 a 170°C. Os melhores resultados foram obtidos para as seguintes condições de tratamento: tempo de processo 35 minutos; temperatura de 140°C; concentração do catalisador de 2,5 % (m/s); umidade de 90,5% e rotação de 50 rpm. As respostas foram:...
Recently there has been an increase search for a large utilization of agro-industrial residues based on recovering substances and/or materials to increase the economical efficiency of the production. Several processes were developed for production fine chemicals compounds and other products. The application of agro-industrial residues on bioprocesses is an alternative observed in the substract form, and also a help to solve the pollution problem on the processes of agro-industrialization. The cassava waste is a solid residue produced in agro-industry that extracts its starch which has a high starch content which is wasted and causes environmental problems. The recovery of these residual starch by physical or biological treatment of the material require research aiming the optimization of the chosen processes, as well as for aggregating value to the consumed raw material. The cassava starch production generates about 930 Kg of solid waste with approximately 85% of moisture to each 1000 Kg of processed root, presenting a concentration of starch residue from 60 to 70% on a dry weight. In order to obtain a better use of the residual starch present on the cassava waste, in the present work an optimized methodology for hydrolysate production, was developed with production of a glucose rich solution from a hydrotermic treatment with subcritical fluid. The residual waste treatment originated from an agro-industry with 85% of moisture was performed in a stirred reactor with agitator in amounts of 2 Kg using sulphuric acid as a catalyst at temperatures between 140 and 170°C. The optimum results were obtained to the following treatment conditions: ...(Complete abstract click electronic access below)
Recently there has been an increase search for a large utilization of agro-industrial residues based on recovering substances and/or materials to increase the economical efficiency of the production. Several processes were developed for production fine chemicals compounds and other products. The application of agro-industrial residues on bioprocesses is an alternative observed in the substract form, and also a help to solve the pollution problem on the processes of agro-industrialization. The cassava waste is a solid residue produced in agro-industry that extracts its starch which has a high starch content which is wasted and causes environmental problems. The recovery of these residual starch by physical or biological treatment of the material require research aiming the optimization of the chosen processes, as well as for aggregating value to the consumed raw material. The cassava starch production generates about 930 Kg of solid waste with approximately 85% of moisture to each 1000 Kg of processed root, presenting a concentration of starch residue from 60 to 70% on a dry weight. In order to obtain a better use of the residual starch present on the cassava waste, in the present work an optimized methodology for hydrolysate production, was developed with production of a glucose rich solution from a hydrotermic treatment with subcritical fluid. The residual waste treatment originated from an agro-industry with 85% of moisture was performed in a stirred reactor with agitator in amounts of 2 Kg using sulphuric acid as a catalyst at temperatures between 140 and 170°C. The optimum results were obtained to the following treatment conditions: ...(Complete abstract click electronic access below)
Descrição
Palavras-chave
Mandioca, Fibras, Álcool, Hidrolise, Cassava waste, Hydrolysate, Hydrotermal pretreatment, Fibre
Como citar
SAITO, Irene Miuki. Produção de hidrolisados e fibras a partir de resíduo da industrialização da mandioca submetido a pré-tratamento hidrotérmico. 2005. xii, 97 f. Tese (doutorado) - Universidade Estadual Paulista, Faculdade de Ciências Agronômicas, 2005.