Investigation of applying calcium oxide for the removal of bitter substances from hop wastes

• Authors: Krystyna Hoffmann , Józef Hoffmann , Marta Huculak-Mączka , Jakub Skut
• Languages of publication: EN

Abstracts

EN

Utilization of brewery wastes is one of the solutions for the production of the fodder supplements containing biogenic nutrients. The condition of such application is to meet the requirements included in the regulations regarding animal feeding, particularly removing a bitter taste. The aim of the performed investigations was the removal of bitter acids from the post-extraction hop waste using the calcium oxide addition. For the examination hop wastes obtained as a by-product from the CO2 plant extraction in supercritical conditions, were applied. Physicochemical properties of the waste samples collected for the investigations were determined by applying the available standard analytical techniques. The analyses of the determination of bitter acids were carried out by the high performance liquid chromatography method. During the experiments very good effects of bitter acids removal from hop wastes, were obtained by using CaO suspensions in water. The investigations on the influence of the CaO concentration in suspension on the efficiency of bitter acids removal indicate the possibility of applying suspensions by 2 wt% for this purpose.

Keywords

EN

hop wastes; bitter acids; calcium oxide

• Publisher: De Gruyter Open
• Journal: Polish Journal of Chemical Technology
• Year: 2011
• Volume: 13
• Issue: 1
• Pages: 35-40

Dates

published

1 - 1 - 2011

online

17 - 3 - 2011

Contributors

author

Krystyna Hoffmann

• Chemistry Department, Intitute of Inorganic Technology and Mineral Fertilizers, Wroclaw University of Technology, ul. Wybrzeże Wyspiańskiego 27, 50-372 Wrocław, Poland

author

Józef Hoffmann

• Chemistry Department, Intitute of Inorganic Technology and Mineral Fertilizers, Wroclaw University of Technology, ul. Wybrzeże Wyspiańskiego 27, 50-372 Wrocław, Poland

author

Marta Huculak-Mączka

• Chemistry Department, Intitute of Inorganic Technology and Mineral Fertilizers, Wroclaw University of Technology, ul. Wybrzeże Wyspiańskiego 27, 50-372 Wrocław, Poland

author

Jakub Skut

• Chemistry Department, Intitute of Inorganic Technology and Mineral Fertilizers, Wroclaw University of Technology, ul. Wybrzeże Wyspiańskiego 27, 50-372 Wrocław, Poland

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Identifiers

DOI

10.2478/v10026-011-0007-8