The quintessence of this work was to describe internal possibilities for recycling of waste beers in order to minimize beer losses in the brewery. Quantitatively, yeast beers, pre and post runs from filtration, beers from underfilled or mislabelled bottles from filler and return beers are the most significant types of waste beers within a brewery. To evaluate recovery systems for yeast beers, various indicators for yeast cells and for yeast beers were developed. Yeast suspensions have to be processed quickly to guarantee high quality yeast beers. Prior to blending to pitching wort, yeat beers have to be flash pasteurized to inactivate undesirable enzyme activities. Waste beers from other sources should be blended in the whirlpool or directly in the pipe between whirlpool and wort cooler. When using de-aerated water, pre and post runs of the filter can be blended into the ongoing filtration processs.
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The quintessence of this work was to describe internal possibilities for recycling of waste beers in order to minimize beer losses in the brewery. Quantitatively, yeast beers, pre and post runs from filtration, beers from underfilled or mislabelled bottles from filler and return beers are the most significant types of waste beers within a brewery. To evaluate recovery systems for yeast beers, various indicators for yeast cells and for yeast beers were developed. Yeast suspensions have to be proc...
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