Operating parameters in open culture fermentation of sugars
[ 1 ] Instytut Inżynierii Środowiska i Instalacji Budowlanych, Wydział Inżynierii Środowiska i Energetyki, Politechnika Poznańska | [ P ] employee
2021
scientific article
english
- glucose
- xylose
- galactose
- maize silage
- open culture fermentation
- carboxylic acids
EN Open culture fermentation (OCF) is a promising technology for converting different organic waste into carboxylic acids (CAs) and alcohols in the context of biorefinery. This study investigated OCF to enhance the production of CAs and alcohols from three different monosaccharides: glucose, xylose, galactose and a mixture of two sugars: glucose with galactose. In addition, more complex substrates, such as maize silage and strawberry wastewater were used as well. The investigated variables included following operational parameters: substrate type, pH, retention time and sugar loading. Promising results were obtained for complex substrates. The highest CAs yield was noticed for raw maize silage at pH 8 and RT 1 day. For monosaccharides the most efficient process was the cofermentation (glucose/galactose) (substrate loading 4 g L-1). CAs composition varied with the changing pH and type of sugar and substrate: in neutral conditions, acetic acid; in acidic conditions, acetic and butyric acids; and in alkaline conditions butyric acid were dominant, respectively. Statistical inference showed optimal conditions for the production of defined compounds from a specific monosaccharide, which could be helpful for designing experiments aiming at particular CA.
26.08.2021
78 - 90
100
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