Abstract
Aspergillus terreus, isolated from rotting bagasse, showed comparable cellulolytic activities when grown either in the free or immobilized states with cellulose as the sole carbon source. The cultural and nutritional requirements for maximum cellulase production by the organism either in the free or immobilized states were similar, except an increase in the temperature optimum from 30 to 40°C, occurred upon immobilization. In the free state, the maximum filter paper hydrolase, carboxymethylcellulase and β-glucosidase activities produced were 2.1, 13.6, and 3.2 U/ml, respectively, while in the immobilized state, the levels were 1.8, 12.0, and 2.4 U/ml. Production of cellulolytic enzymes by immobilized cells was influenced by the surface area of the support material. In addition, cells in the immobilized state sustained enzyme production for a much longer period with a 4.5-fold increase in productivity during repeated batch when compared to free cells.
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The authors acknowledge the research grant provided by Universiti Sains Malaysia, Penang that has resulted in this article.
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Hui, Y.S., Amirul, A.A., Yahya, A.R.M. et al. Cellulase production by free and immobilized Aspergillus terreus . World J Microbiol Biotechnol 26, 79–84 (2010). https://doi.org/10.1007/s11274-009-0145-9
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DOI: https://doi.org/10.1007/s11274-009-0145-9