Substrate Profiles in Pellets Formed by Aspergillus niger.

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Abstract

A simulation of the profiles of starch, its microbial metabolites, and dissolved oxygen in Aspergillus niger pellets formed by 5-day culture was carried out in order to assess the feasibility of starch wastewater treatment by fungal pellets. A higher oxygen permeability in the pellets was obtained with increasing pellet diameter, but glucose seemed to be accumulated inside the pellet under anaerobic conditions. However, effectiveness of the pellets was maintained at the high level when the bulk DO concentration was high. Since the substrate permeability of fungal pellets was superior to that of the bead immobilized by PVA-boric acid method, their highly effective treatment process of the starch wastewater was suggested to be feasible.

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