Otimização da produção de celulase empregando resíduos celulósicos e aplicação na nutrição de ruminantes
Autor(a) principal: | |
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Data de Publicação: | 2018 |
Tipo de documento: | Dissertação |
Idioma: | por |
Título da fonte: | Biblioteca Digital de Teses e Dissertações da USC |
Texto Completo: | http://tede2.usc.br:8080/jspui/handle/tede/391 |
Resumo: | Currently, in the paper industry, it is generated a large amounts of industrial waste. Specifically in the bleaching stage, the waste produced contains a high amount of toxic substances such as chlorine and ozone, generating a considerable risk to the environment and to human and animal health, thus, the treatment before disposal is essential, but generates costs for this sector. The production of cellulase using this raw material aims to contribute to the reduction of costs for the industry and the production of products with quality, besides reducing the damages caused to the environment. Cellulases can be applied in various industrial sectors, replacing chemical catalysts, aiding in textile finishing processes, in the food industry and in animal nutrition. The objective of this study was to optimize the production of cellulase using two residues from the pulp bleaching process of a paper agroindustry and evaluate the action of enzymes in the hay. The residues were characterized physicochemically for determination of organic and inorganic constituents and pH. The production was done by submerged liquid fermentation using the Aspergillus niger microorganism, inoculated in culture medium described in the literature, plus the residues, separately. To obtain the optimum production conditions, some variables were altered as pH, temperature, residue concentration, agitation and production period. The enzyme was semi purified with ammonium sulfate. The results showed the potential contaminant both residues once the levels of chlorides, pH, iron and sodium was above recommendation by CONAMA. The fungus was able to produce the cellulase, using the residues as inductors fungus produced cellulose in presence of both residues, and the acid was the better inductor, under the following conditions: 50% acid residue: 7 days of production, pH 8.0, agitation at 100 rpm and at 45°C.The ability to favor digestibility in vitro tests, which simulated the bovine rumen. The results showed that there was an improvement in digestion, where enzyme by residue 2 was more efficient than enzyme by alkaline residue, such as in cellulose, at the time of 180 minutes. Comparing the pre and post-digestion analyzes, it was observed that there was partially significant digestion of the fibers analyzed, showing the capacity of the enzymes produced in hydrolyzing molecules of the cellulosic complex. |
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Queiroz-Fernandes, Geisiany Maria de58.718.331-7015.715.896-94http://lattes.cnpq.br/487113702247639648.798.933-8421.104.948-83http://lattes.cnpq.br/6422292335500496Stati, Vanessa Fernanda2018-04-20T18:21:50Z2018-02-26STATI, Vanessa Fernanda. Otimização da produção de celulase empregando resíduos celulósicos e aplicação na nutrição de ruminantes. 2018. 75 f. Dissertação (Mestrado em Ciência e Tecnologia Ambiental) - Universidade do Sagrado Coração, Bauru, 2018.http://tede2.usc.br:8080/jspui/handle/tede/391Currently, in the paper industry, it is generated a large amounts of industrial waste. Specifically in the bleaching stage, the waste produced contains a high amount of toxic substances such as chlorine and ozone, generating a considerable risk to the environment and to human and animal health, thus, the treatment before disposal is essential, but generates costs for this sector. The production of cellulase using this raw material aims to contribute to the reduction of costs for the industry and the production of products with quality, besides reducing the damages caused to the environment. Cellulases can be applied in various industrial sectors, replacing chemical catalysts, aiding in textile finishing processes, in the food industry and in animal nutrition. The objective of this study was to optimize the production of cellulase using two residues from the pulp bleaching process of a paper agroindustry and evaluate the action of enzymes in the hay. The residues were characterized physicochemically for determination of organic and inorganic constituents and pH. The production was done by submerged liquid fermentation using the Aspergillus niger microorganism, inoculated in culture medium described in the literature, plus the residues, separately. To obtain the optimum production conditions, some variables were altered as pH, temperature, residue concentration, agitation and production period. The enzyme was semi purified with ammonium sulfate. The results showed the potential contaminant both residues once the levels of chlorides, pH, iron and sodium was above recommendation by CONAMA. The fungus was able to produce the cellulase, using the residues as inductors fungus produced cellulose in presence of both residues, and the acid was the better inductor, under the following conditions: 50% acid residue: 7 days of production, pH 8.0, agitation at 100 rpm and at 45°C.The ability to favor digestibility in vitro tests, which simulated the bovine rumen. The results showed that there was an improvement in digestion, where enzyme by residue 2 was more efficient than enzyme by alkaline residue, such as in cellulose, at the time of 180 minutes. Comparing the pre and post-digestion analyzes, it was observed that there was partially significant digestion of the fibers analyzed, showing the capacity of the enzymes produced in hydrolyzing molecules of the cellulosic complex.Atualmente, na indústria de celulose e papel existe a geração de grande quantidade de resíduos industriais. Especificamente na etapa de branqueamento, o resíduo produzido apresenta grande quantidade de substâncias tóxicas como o cloro e ozônio, gerando enorme risco ao meio ambiente e para a saúde humana e animal. Assim, o tratamento antes do descarte é essencial, o qual gera custos para esse setor. A produção de celulase utilizando essa matéria-prima visa contribuir com a diminuição de custos para a indústria e a produção de produtos com qualidade, além de diminuir os danos causados ao meio ambiente. Celulases podem ser aplicadas em diversos setores industriais, substituindo catalisadores químicos, auxiliando em processos de finalização de produtos têxteis, na indústria alimentícia e ou em nutrição animal. Desta forma, o objetivo deste estudo foi otimizar a produção de celulase utilizando resíduo ácido e alcalino gerados a partir do processo de branqueamento da celulose e avaliar a ação destas enzimas sobre o feno. Estes resíduos foram caracterizados físico-quimicamente para determinação da concentração de constituintes orgânicos, inorgânicos e pH. A produção foi realizada por fermentação líquida submersa, utilizando o micro-organismo Aspergillus niger, inoculado em meio de cultura, acrescido dos resíduos separadamente. Para a obtenção das condições ótimas de produção, algumas variáveis foram alteradas, como pH, temperatura, concentração dos resíduos, velocidade de agitação e período de produção. A enzima produzida foi semi-purificada com sulfato de amônio. Os resíduos mostraram potencial contaminante, uma vez que alguns parâmetros como cloretos, pH, ferro e sódio ficaram acima da recomendação do CONAMA. O fungo foi capaz de produzir a celulase na presença de ambos os resíduos, sendo o resíduo ácido o melhor indutor. As melhores condições de produção para este foram: 50% de resíduo, 7 dias de produção a 45ºC, 100 rpm e pH 8,0. A capacidade das enzimas em degradar o feno foi avaliada por meio de testes in vitro, que simularam o rúmen bovino. Os resultados mostraram que as enzimas favoreceram a digestão do feno, sendo aquela obtida do resíduo ácido mais eficiente, por exemplo, sobre a celulose onde houve maior redução em 180 minutos. Comparando ainda as análises sem e com digestão, observaram-se resultados significantes, mostrando a capacidade das enzimas produzidas em hidrolisar moléculas do complexo celulósico.Submitted by Laudeceia Machado (laudeceia.machado@usc.br) on 2018-04-20T18:21:50Z No. of bitstreams: 1 Otimizacao da producao de celulase empregando residuos celulosicos e aplicacao na nutricao de ruminantes (217017).pdf: 1035432 bytes, checksum: b803679246c373f7f1f1dea2a2eba6d4 (MD5)Made available in DSpace on 2018-04-20T18:21:50Z (GMT). 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dc.title.eng.fl_str_mv |
Otimização da produção de celulase empregando resíduos celulósicos e aplicação na nutrição de ruminantes |
dc.title.alternative.eng.fl_str_mv |
Optimization of cellulase production using cellulosic residues and application in ruminant nutrition |
title |
Otimização da produção de celulase empregando resíduos celulósicos e aplicação na nutrição de ruminantes |
spellingShingle |
Otimização da produção de celulase empregando resíduos celulósicos e aplicação na nutrição de ruminantes Stati, Vanessa Fernanda Aspergillus niger Digestibilidade Fermentação líquida submersa Aspergillus niger Digestibility Submerged liquid fermentation CIENCIAS EXATAS E DA TERRA |
title_short |
Otimização da produção de celulase empregando resíduos celulósicos e aplicação na nutrição de ruminantes |
title_full |
Otimização da produção de celulase empregando resíduos celulósicos e aplicação na nutrição de ruminantes |
title_fullStr |
Otimização da produção de celulase empregando resíduos celulósicos e aplicação na nutrição de ruminantes |
title_full_unstemmed |
Otimização da produção de celulase empregando resíduos celulósicos e aplicação na nutrição de ruminantes |
title_sort |
Otimização da produção de celulase empregando resíduos celulósicos e aplicação na nutrição de ruminantes |
author |
Stati, Vanessa Fernanda |
author_facet |
Stati, Vanessa Fernanda |
author_role |
author |
dc.contributor.advisor1.fl_str_mv |
Queiroz-Fernandes, Geisiany Maria de |
dc.contributor.advisor1ID.fl_str_mv |
58.718.331-7 015.715.896-94 |
dc.contributor.advisor1Lattes.fl_str_mv |
http://lattes.cnpq.br/4871137022476396 |
dc.contributor.authorID.fl_str_mv |
48.798.933-8 421.104.948-83 |
dc.contributor.authorLattes.fl_str_mv |
http://lattes.cnpq.br/6422292335500496 |
dc.contributor.author.fl_str_mv |
Stati, Vanessa Fernanda |
contributor_str_mv |
Queiroz-Fernandes, Geisiany Maria de |
dc.subject.por.fl_str_mv |
Aspergillus niger Digestibilidade Fermentação líquida submersa |
topic |
Aspergillus niger Digestibilidade Fermentação líquida submersa Aspergillus niger Digestibility Submerged liquid fermentation CIENCIAS EXATAS E DA TERRA |
dc.subject.eng.fl_str_mv |
Aspergillus niger Digestibility Submerged liquid fermentation |
dc.subject.cnpq.fl_str_mv |
CIENCIAS EXATAS E DA TERRA |
description |
Currently, in the paper industry, it is generated a large amounts of industrial waste. Specifically in the bleaching stage, the waste produced contains a high amount of toxic substances such as chlorine and ozone, generating a considerable risk to the environment and to human and animal health, thus, the treatment before disposal is essential, but generates costs for this sector. The production of cellulase using this raw material aims to contribute to the reduction of costs for the industry and the production of products with quality, besides reducing the damages caused to the environment. Cellulases can be applied in various industrial sectors, replacing chemical catalysts, aiding in textile finishing processes, in the food industry and in animal nutrition. The objective of this study was to optimize the production of cellulase using two residues from the pulp bleaching process of a paper agroindustry and evaluate the action of enzymes in the hay. The residues were characterized physicochemically for determination of organic and inorganic constituents and pH. The production was done by submerged liquid fermentation using the Aspergillus niger microorganism, inoculated in culture medium described in the literature, plus the residues, separately. To obtain the optimum production conditions, some variables were altered as pH, temperature, residue concentration, agitation and production period. The enzyme was semi purified with ammonium sulfate. The results showed the potential contaminant both residues once the levels of chlorides, pH, iron and sodium was above recommendation by CONAMA. The fungus was able to produce the cellulase, using the residues as inductors fungus produced cellulose in presence of both residues, and the acid was the better inductor, under the following conditions: 50% acid residue: 7 days of production, pH 8.0, agitation at 100 rpm and at 45°C.The ability to favor digestibility in vitro tests, which simulated the bovine rumen. The results showed that there was an improvement in digestion, where enzyme by residue 2 was more efficient than enzyme by alkaline residue, such as in cellulose, at the time of 180 minutes. Comparing the pre and post-digestion analyzes, it was observed that there was partially significant digestion of the fibers analyzed, showing the capacity of the enzymes produced in hydrolyzing molecules of the cellulosic complex. |
publishDate |
2018 |
dc.date.accessioned.fl_str_mv |
2018-04-20T18:21:50Z |
dc.date.issued.fl_str_mv |
2018-02-26 |
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STATI, Vanessa Fernanda. Otimização da produção de celulase empregando resíduos celulósicos e aplicação na nutrição de ruminantes. 2018. 75 f. Dissertação (Mestrado em Ciência e Tecnologia Ambiental) - Universidade do Sagrado Coração, Bauru, 2018. |
dc.identifier.uri.fl_str_mv |
http://tede2.usc.br:8080/jspui/handle/tede/391 |
identifier_str_mv |
STATI, Vanessa Fernanda. Otimização da produção de celulase empregando resíduos celulósicos e aplicação na nutrição de ruminantes. 2018. 75 f. Dissertação (Mestrado em Ciência e Tecnologia Ambiental) - Universidade do Sagrado Coração, Bauru, 2018. |
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http://tede2.usc.br:8080/jspui/handle/tede/391 |
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por |
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