Description
Bottmingen, 22.02.2013, The Labfors 5 BioEtOH bioreactor (INFORS HT) was specifically designed for research and development in the lignocellulosic ethanol production sector.The system combines the proven technology of a microbial bioreactor with innovative developments in the stirrer system. Thus, a perfect mixing is achieved when applied to solid substrates.
The production of ethanol from lignocellulose-containing raw material is a 2-phaseprocess that consists of enzymatic hydrolysis to release the sugar and the actual fermentation. The Labfors 5 BioEtOH combines both steps in a single system.
“The biggest challenge in the development was the different physical properties of the starting materials. The selection of stirrer types (helical and anchor stirrer) optimally meets the different mixing requirements of each substrate”, says Simon Egli, project leader, INFORS HT. “In combination with the powerful high-torque motor, we achieve fast and perfect mixing, even when substrates with high viscosity or high solids content are applied.”
The reduced heat transfer in solid substrates in comparison to liquids represents another challenge. A second point of temperature measurement in the vessel jacket prevents
overheating on the inside wall of the vessel and keeps the enzyme activity high. In the following anaerobic fermentation step, the bioreactor provides perfect cultivation conditions and comprehensive bioprocess control.
The Labfors 5 BioEtOH has been thoroughly used at the Lund University in Sweden with various pre-treated materials such as wheat straw, bagasse or spruce. ”We are impressed
by the mixing efficiency of the Labfors 5 BioEtOH.”, reports Mats Galbe, PhD (Dep. Chemical Engineering, Lund University).
