Til hovedinnhold
English
Publikasjoner

Real-time monitoring and automatic density control of large-scale microalgal cultures using near infrared (NIR) optical density sensors

Vitenskapelig artikkel
Publiseringsår
2006
Tidsskrift
Journal of Biotechnology
Eksterne nettsted
Cristin
Forfattere
Joanna Malony Sandnes, Tom Ringstad, Dag Wenner, Petter Hieronymus Heyerdahl, Torsten Kallqvist, Hans Ragnar Gislerød

Sammendrag

Signals from near infrared (NIR) light transmittance sensors were used for both real-time monitoring of algal biomass density in growing mass cultures (2001 tubular biofences), and also as feedback in a system that controlled the density of the culture by automatic injection of fresh growth medium. When operated in a semi-continuous production mode between predefined density values, diurnal growth patterns were recorded on-line that provided information on the dynamics of the microalgal cultures with respect to environmental conditions. The bioreactor system was also programmed to operate in constant biomass density mode, thereby maintaining the culture at the optimal population density (OPD), and sustaining high biomass production levels. The system has potential for operating a dynamic density set point for microalgal cultures where the optimal population density varies as a function of ambient growing conditions. (c) 2005 Elsevier B.V. All rights reserved.