ISSN:
1432-0614
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
,
Process Engineering, Biotechnology, Nutrition Technology
Notes:
Abstract The mutant Pol6 of Penicillium occitanis is an interesting strain for producing cellulases and hemicellulases. The nitrogen source and substrate that regulate cellulase production were evaluated in shake-flask and fermentor (batch and fed-batch) culture. The nature of the nitrogen source and the C/N ratio markedly affected cellulase production by P. occitanis. When nitrate was used in Mandels and Weber's basal growth medium with a C/N ratio below 20.2, it resulted in more cellulase production than from urea or ammonium sulphate. Crude substrates such as wheat bran and wheat flour residues, used in combination with a local cellulose esparto grass paper pulp as an alternative nitrogen source and cellulose substrates, also gave high cellulase yields. Greatest cellulase yields and productivity were obtained by fed-batch cultivation [23 filter-paper activity units (FPU)/ml and 168 FPUl–1h–1].
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/s002530050400
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