INVESTIGADORES
NEGRI ricardo Martin
artículos
Título:
Customized design of electronic noses placed on top of air-lift bioreactors for in situ monitoring the off-gas patterns.
Autor/es:
ROSI, P.; MISCORIA, S.A.; BERNIK, D.L.; NEGRI, R.M.
Revista:
BIOPROCESS AND BIOSYSTEMS ENGINEERING
Editorial:
SPRINGER
Referencias:
Lugar: Berlin; Año: 2012
ISSN:
1615-7591
Resumen:
Abstract A specially designed electronic nose was
coupled to an air-lift bioreactor in order to perform on-line
monitoring of released vapors. The sensor array was placed
at the top of the bioreactor sensing the headspace in
equilibrium with the evolving liquor at any time without
the need of aspiration and pumping of gases into a separated
sensor chamber. The device was applied to follow the
off-gas of a bioreactor with Acidithiobacillus thiooxidans
grown on beds of elemental sulfur under aerobic conditions.
Evolution was monitored by acid titration, pH and
optical density measurements. The electronic nose was
capable to differentiate each day of reactor evolution since
inoculation within periods marked off culture medium
replacements using multivariate data analysis. Excellent
discrimination was obtained indicating the potentiality for
on-line monitoring in non-perturbed bioreactors. The
prospects for electronic nose/bioreactor merging are valuable
for whatever the bacterial strain or consortium used in
terms of scent markers to monitor biochemical processes.