FOOD. Science. Technology. Quality

Food. SCIENCE. Technology. Quality

Food. Science. TECHNOLOGY. Quality

Food. Science. Technology. QUALITY




Preliminary study on quality of some wheat lines selected as raw material for malting


An increasing demand for niche beers in Poland has created the need for wheat malts and, thus, there are sought indigenous raw materials are for the manufacture of beers. The objective of the research study was to determine the suitability of grain of some common wheat lines selected for malting, to establish the most important quality parameters of that grains and to point out the selection criteria for cultivation. A lab scale technological process of wheat malt was applied, the one similar to the process used in producing a Pilsen malt. Likewise, the methodologies utilized when evaluating grain, malts, and wort of barley were used to assess the brewing value of grain, malt, and wort of wheat. The study performed included grain of 12 cultured lines of spring and winter wheat, grain of 2 commercially available wheat malts, and grain of standard EBC barley malt. Wheat malts were characterized by a very poor friability equalling 22.5 %. That characteristic adversely affected other quality parameters of malt and wort. The content of protein significantly impacted several characteristics to decide on the suitability of the grain for malting. The effect of protein content on the proteolytic activity and diastatic power was positive; however, it was negative on the content of starch in grain, malt extractability, and wort viscosity. The content of total protein in wheat, similar to barley, can be set as an initial criterion of selecting cultivars for malting. It was found that the grain of winter wheat was a better material for malting than the grain of spring wheat, mainly because it had less protein. The results obtained highlight that it is necessary to continue the research studies in order to develop an appropriate wheat malting technology oriented on the optimization of steeping, germination, and kilning processes and well suited to the characteristics of a raw material.


spring wheat, winter wheat, grain, malt, wort, brewing value