Airlift reactor — membrane extraction hybrid system for aroma production
-
Mário Mihaľ
,
Sean Gavin
Abstract
In recent times, environmental production methods and organic products are increasingly sought after in food, perfume, and cosmetic industries, where the products are consumed or come into direct contact with humans. One such additive is 2-phenylethanol, an alcoholic aromatic rose like smell compound, mainly used as a flavor and aroma. 2-Phenylethanol can be produced by bioconversion from l-phenylalanine using Saccharomyces cerevisiae. This type of biotransformation is strongly limited by product inhibition which allows reaching the maximum concentration of 2-phenylethanol, 4 g L−1, in an ordinary batch, fed-batch, or chemostat bioreactor. The main aim of the presented work was to study the possible yield increase of 2-phenylethanol in a hybrid system consisting of membrane extraction performed by a hollow fiber membrane module immersed in the downcomer of an airlift reactor. Such hybrid system can be used to remove 2-phenylethanol from the fermentation medium and thus to overcome the product inhibition of biotransformation. In this paper, the influence of biomass on membrane extraction of 2-phenylethanol from aqueous solution in an airlift reactor to alkanes at different operational conditions was studied. The measured extraction kinetics was compared with the predictions obtained by a mathematical model. Hydrodynamics of the hybrid system was also studied.
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© 2012 Institute of Chemistry, Slovak Academy of Sciences
Articles in the same Issue
- Fifty years of the Department of Chemical and Biochemical Engineering at the Slovak University of Technology in Bratislava — brief history of research
- Airlift reactor — membrane extraction hybrid system for aroma production
- CFD-based atmospheric dispersion modeling in real urban environments
- Catalytic gasification of pyrolytic oil from tire pyrolysis process
- Kinetics of thermal decomposition of aseptic packages
- Sulphur distribution in the products of waste tire pyrolysis
- Equilibrium and kinetics of protein binding on ion-exchange cellulose membranes with grafted polymer layer
- Modeling of equilibrium and kinetics of human polyclonal immunoglobulin G adsorption on a tentacle cation exchanger
- Design calculations of an extractor for aromatic and aliphatic hydrocarbons separation using ionic liquids
- Effect of viscosity of a liquid membrane containing oleyl alcohol on the pertraction of butyric acid
- Anaerobic treatment of rapeseed meal
- Anoxic granulated biomass and its storage
- Removal of selected chlorinated micropollutants by ozonation
- Degradation and toxicity changes in aqueous solutions of chloroacetic acids by Fenton-like treatment using zero-valent iron
Articles in the same Issue
- Fifty years of the Department of Chemical and Biochemical Engineering at the Slovak University of Technology in Bratislava — brief history of research
- Airlift reactor — membrane extraction hybrid system for aroma production
- CFD-based atmospheric dispersion modeling in real urban environments
- Catalytic gasification of pyrolytic oil from tire pyrolysis process
- Kinetics of thermal decomposition of aseptic packages
- Sulphur distribution in the products of waste tire pyrolysis
- Equilibrium and kinetics of protein binding on ion-exchange cellulose membranes with grafted polymer layer
- Modeling of equilibrium and kinetics of human polyclonal immunoglobulin G adsorption on a tentacle cation exchanger
- Design calculations of an extractor for aromatic and aliphatic hydrocarbons separation using ionic liquids
- Effect of viscosity of a liquid membrane containing oleyl alcohol on the pertraction of butyric acid
- Anaerobic treatment of rapeseed meal
- Anoxic granulated biomass and its storage
- Removal of selected chlorinated micropollutants by ozonation
- Degradation and toxicity changes in aqueous solutions of chloroacetic acids by Fenton-like treatment using zero-valent iron
