Production of biomass from untreated orange peel by Fusarium avenaceum |
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| Authors: | Mauro Moresi Francesca Clementi Jone Rossi Roberto Medici Gian Luca Vinti |
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| Affiliation: | (1) Dipartimento di Ingegneria Chimica, Materiali, Materie Prime e Metallurgia, University of Rome, La Sapienza, Via Eudossiana 18, I-00184 Rome, Italy;(2) Present address: Istituto di Microbiologia e Tecnologie Agrarie e Forestali; Facoltà di Agraria, University of Basilicata, Via Nazario Sauro 85, I-85 100 Potenza, Italy;(3) Present address: Istituto di Microbiologia Lattiero-Casearia; Facoltà di Agraria, University of Perugia, Via S. Costanzo, I-6100 Perugia, Italy |
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| Abstract: | Summary The growth behaviour of Fusarium avenaceum (Sect. Roseum Wr.) in slurry fermentation systems using untreated orange peel as substrate was studied in a laboratory-fermenter scale to reproduce the results obtained in a shakenflask fermenter. The eventual effect of impeller speed on mechanical disruption of mycelial hyphae was then assessed by determining mycelial growth, total reducing sugars consumption, TOC reduction, carbon dioxide evolution and oxygen absorption rates. In particular, the main biomass yield coefficient, as well as the apparent specific growth rate, appeared to be independent of the impeller speed, at least within the experimental range of 450 and 900 min–1 (equivalent to peripheral impeller speeds of 3.8–7.5 m sec–1. |
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