Investigation of applying calcium oxide for the removal of bitter substances from hop wastes
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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.
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- The final documents of United Nations Conference "Environmental and Development" Rio de Janeiro (1992). Top of Earth, IOS, Warszawa, 1998.
- Kowalski, Z. (1998). The cleaner produtions as strategy of protection of natural environment, Mentor, Kraków (in Polish).
- Hoffmann, J. & Hoffmann, K. (2003). Sustainable development in the production of fertilizers, Przem. Chem., 82, 8-9 (in Polish).
- Hoffmann, J. N. & Radosiński, E. (2007). Environmental management concepts supported by information technology, Pol. J Chem. Tech., 4, 8-13. DOI: 10.2478/v10026-007-0080-1[Crossref]
- Jamroz, D. (2001). Animal nutrition and feeds, vol.1, Wyd. Nauk. PWN, Warszawa.
- Hoffmann, J., Hoffmann, K., Borowiec, M. & Huculak M. (2009). Environmental aspects of feed phosphates production, Pol. J Chem. Tech., 11,1, 16-19. DOI: 10.2478/v10026-009-0005-2[Crossref]
- Hoffmann, J. & Hoffmann, K. (2009). Study on the production of feed calcium phosphates with the use of concentratrated phosphoric acid, Przem. Chem., 88/5,450-453 (in Polish).
- Pera, K. (2005). Waste recovery - technologies and the possibility of methodological basis for a comprehensive economic evaluation of non-waste technology, IGSMiE PAN, Kraków (in Polish).
- Amended propos al for Directive of the European Parliament and Council on undesirable substances and products In Animals nutrition. (2001) Official Journal on the European Communities, 2001/C96E/35.
- Pazera, T. & Rzemieniuk, T. (1998). Brewing, Wyd. Szkol. i Pedagog., Warszawa.
- Kunze, W. (1999). Technology Brewing and Malting, Wyd. Piwochmiel/ VLB, Berlin (in Polish).
- Mączka, W., Anioł, M., Huszcza, E., Bartmańska A., Żołnierczyk A. & Wawrzeńczyk, Cz. (2009). Higher plants-mediated degradation of hop bitter acids, Przem. Chem., 88/ 5, 509-511 (in Polish).
- Best Available Techniques (BAT), (2005). Guidelines for the brewing industry, Ministry of Environmental Protection, Warszawa (in Polish).
- Skowroński, B. & Mordecka, Z. (2001). Polish installation for supercritical extraction of hops, Przem. Chem., 11, 521-523 (in Polish).
- Hermanowicz, W., Dożańska, W., Dojlido, J. & Kosiorowski, B. (1976). Physico- chemical researches on the water and sewage, Arkady, Warszawa (in Polish).
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