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Reduction of water consumption in bioethanol production from triticale by recycling the stillage liquid phase

100%

Gumienna M., Lasik M., Szambelan K., Czarnecki Z.

Acta Scientiarum Polonorum. Technologia Alimentaria

2011

tom 10

nr 4

Background. The distillery stillage is a major and arduous byproduct generated during ethanol production in distilleries. The aim of this study was to evaluate the possibility of the stillage recirculation in the mashing process of triticale for non-byproducts production and reducing the fresh water consumption. The number of recirculation cycles which can be applied without disturbances in the ethanol fermentation process was investigated. MateriaL and methods. Winter triticale BOGO and “Ethanol Red” Saccharomyces cerevisiae yeast were used in the experiments. The method of non-pressure cooking was used for gelatinizing the triticale, commercial α-amylase SPEZYME ETHYL and glucoamyl- ase FERMENZYME L-400 were applied for starch liquefaction and saccharification. The process was conducted at 30°C for 72 h, next after distillation the stillage was centrifuged and the liquid fraction was used instead of 75% of process water. Results. Ethanol yield from triticale fermentations during 40 cycles ranged between 82% and 95% of theoretical yield preserving yeast vitality and quantity on the same level. The obtained distillates were characterized with enhanced volatile compounds (fusel oil, esters, aldehydes, methanol) as well as protein and potassium concentrations. Conclusions. The liquid part of stillage was proved that can be reused instead of water in bioethanol production from triticale, without disturbing the fermentation process. This investigated solution of distillery byproducts utilization (liquid phase of stillage) constitutes the way which could significantly decrease the bioethanol production costs by reducing the water consumption, as well as wastewater production.

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Energy-saving and by-products-free production of ethanol from granular corn starch

100%

Szymanowska D., Grajek W.

BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology

2011

tom 92

nr 1

Ograniczanie wyników

1 Acta Scientiarum Polonorum. Technologia Alimentaria

1 BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology

1 Czarnecki Z.

1 Grajek W.

1 Gumienna M.

1 Lasik M.

1 Szambelan K.

1 Szymanowska D.

2 2011

Wyniki wyszukiwania

Reduction of water consumption in bioethanol production from triticale by recycling the stillage liquid phase

Energy-saving and by-products-free production of ethanol from granular corn starch