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Mémoire de Maîtrise
DOI
Document
Auteur
Nom complet
Sonia Maria Prado Guilmo
Adresse Mail
Unité de l'USP
Domain de Connaissance
Date de Soutenance
Editeur
Piracicaba, 1994
Directeur
Titre en portugais
Seleção de fungos causadores de podridão branca para a biopolpação
Mots-clés en portugais
BIOPOLPAÇÃO
CAVACOS
CELULOSE
ESPECTROFOTOMETRIA
EUCALIPTO
FUNGOS FITOPATOGÊNICOS
FUNGOS LIGNOLÍTICOS
PODRIDÃO BRANCA
SELEÇÃO
Resumé en portugais
O isolamento de fungos decompositores a partir de cavacos de Eucalipytus grandis mostrou a ocorrência de Aspergillus sp., Penicillium sp., Sporotrichum sp., Rhizomucor sp., Botryosphaeria sp., Fusarium sp., Trichoderma sp., Eurotium sp. e três fungos da classe dos Basidiomicetos de gêneros não identificados. Foram avaliadas as frequências relativas de cada fungo isolado observando-se a sucessão de microrganismo no decorrer do período de armazenamento. Os fungos isolados foram selecionados pela capacidade de degradação da lignina em meio de cultivo por meio da análise espectrofotométrica da lignina residual e comparados ao fungo lignnolítico Phaneochaete chrysosporium. Entre os isolados foram selecionados os três Basidiomicetos de gêneros não identificados e o fungo Fusarium sp.. Cavacos de E. grandis foram inoculados com os fungos visando determinar sua potencialidade para redução do consumo de reagentes químicos durante o cozimento e incrementar o rendimento em celulose depurada do cozimento. A celulose obtida de cavacos não tratados com os fungos selecionados apresentou maior número Kappa maior porcentagem de rejeitos quando comparada com a celulose de cavacos tratados biologicamente
Titre en anglais
The selection of fungi which causes white rot to the biopulping
Resumé en anglais
The isolation of fungi decompositors from chips of Eucalyptus grandis, showed the occurence of Aspergillus sp., Penicillium sp., Sporotrichum sp., Rhizomucor sp., Botryosphaeria sp., Fusarium sp., Trichoderma sp., Eurotium sp. and three fungi belonging to the class of the Basidiomycetes of the non- identified kind. The relative frequencies of each isolated fungus have been evaluated by observing the sequence of the microrganism during the period of storage. The isolated fungi were selected by the capacity of deterioration of the lignin in the midth of cultivation, by means of the spectophotometric analysis of the residual lignin, and compared to the ligninolitic fungus Phanerochaete chrysosporium. Among the isolated ones were selected the three basidiomycetes and Fusarium sp. kind. Chips of wood from Eucalyptus grandis were inoculated with the fungi with the purpose of determining its potentiality for the reduction of consumption of chemical reagents during the cooking in order to develop the yield of pulp depurated of cooking. The cellulose of chips which were not treated with the selected fungi showed a higher number of Kappa, a higher porcentage of rejections, when compared to the cellulose of chips biologically treated. The selected fungi appeared to be efficient, with the power of reducing the chemical reagents in the pulping process and in the developness of the depurated revenue of the process
 
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Date de Publication
2019-11-08
 
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