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Type: Artigo
Title: Oxygen transfer in solid-state cultivation under controlled moisture conditions
Author: Bastos, R. G.
Motta, F. L.
Santana, M. H. A.
Abstract: The aim of this work was to study oxygen transfer as a function of the initial moisture content in solid-state cultivation under controlled moisture conditions. The use of controlled moisture conditions prevents drastic changes in the medium during cultivation, allowing the use of a pseudo-steady-state model to estimate the overall oxygen mass transfer coefficient (K L a) in the biofilm around the solid particles. Drechslera (Helminthosporium) monoceras, an aerobic mold that produces allergenic proteins, was cultured on wheat bran in a packed bed column bioreactor. The bed height (30 mm) and air flow rate (0.4 L/min) were selected to implement moisture control. The results show that there is an optimal moisture content (35 %) at which a lower biofilm thickness and packing of the bed improves K L a. However, a higher biomass growth was obtained at 45 % moisture. The different patterns of biomass growth demonstrate the importance of the balance between aerial and film growth in solid-state cultivation. These results contribute to the understanding of oxygen transfer in solid fermentation, optimization of processes, and production of allergen extracts from D. (Helminthosporium) monoceras biomass
Subject: Trigo
Country: Alemanha
Editor: Springer
Rights: Fechado
Identifier DOI: 10.1007/s12010-014-1101-1
Date Issue: 2014
Appears in Collections:FEQ - Artigos e Outros Documentos

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