Pintado J., Lonsane B.K., Gaime Perraud Isabelle, Roussos Sevastianos. (1998). On-line monitoring of citric acid production in solid-state culture by respirometry. Process Biochemistry, 33 (5), p. 513-518. ISSN 0032-9592.
Titre du document
On-line monitoring of citric acid production in solid-state culture by respirometry
Process Biochemistry, 1998,
33 (5), p. 513-518 ISSN 0032-9592
The aim of this work was to study the possibility of monitoring citric acid production from mussel processing wastes (MPW) by Aspergillus niger in solid-state culture (SSC) on an inert support. This was conducted by measuring CO2 and O2 concentration in exhaust gases, using an automatic sampler connected to a gas chromatograph and a data acquisition system. The procedure permitted information on the physiological state of the culture to be obtained. A relationship between citric acid accumulation and a decrease in CO2 production was found, allowing citric acid production to be followed in real-time. Moreover, respiratory activity can be estimated and the effect of different variables on this parameter studied. Initial nitrogen concentration, a critical factor for achieving high production of citric acid from MPW in submerged culture, revealed no effect in SSC. This indicates a tolerance of SSC to higher concentrations of nitrogen constituting an advantage when using residual media with high levels of protein and variability in their composition. (Résumé d'auteur)
Plan de classement
Aérobies [084FERMEN01]
Descripteurs
FERMENTATION EN MILIEU SOLIDE ; DECHET AGROINDUSTRIEL ; AEROBIOSE ; CHAMPIGNON ; METABOLISME ; MILIEU DE CULTURE ; GAZ CARBONIQUE ; OXYGENE ; RESPIROMETRIE ; RAPPORT C/N ; ACIDE CITRIQUE ; EFFLUENT
