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錐形罐發酵液出現酵母味怎麽辦？

作者：山東天泰人氣：发布日期： 2022-04-01

信息摘要：

酵母味是一種令人不舒服的氣味,酵母自溶時尤其明顯。帶有酵母味的啤酒往往具有pH偏高、色度偏深和泡沫性能較差的特點。

錐形罐發酵液出現酵母味怎麽辦？

       酵母味是一種令人不舒服的氣味,酵母自溶時尤其明顯。帶有酵母味的啤酒往往具有pH偏高、色度偏深和泡沫性能較差的特點。
      導致錐形罐發酵液出現酵母味的主要原因有以下幾點：
      ①酵母添加量過大,或使用代數過多、酵母衰老,容易發生自溶。
      ②溫度控制不合理,在雙乙酰還原末期,如下段溫度與中、上段溫度差過大,會引起酒液強烈對流,導致酵母沈降困難,並産生自溶現象。
      ③沈澱酵母未得到及時排放,老弱酵母在罐內停留時間過長,加之錐底因積聚過多酵母而影響冷卻效果,致使罐底酵母長時間處于高溫條件下,從而引起酵母自溶並分散到酒液中,給發酵液帶來酵母味和後苦味。
      ④儲酒溫度過高和儲酒時間過長,導致酵母自溶並釋放出脂肪酸。這些物質會使發酵液具有不舒適的異香味,並對泡沫産生不利影響,其中乙酸乙酯和十二酸乙酯含量高時可共同作用形成酵母味。
      ⑤卫生问题如管道或死角生长霉菌,也会导致發酵液有酵母味。
精酿啤酒設備,啤酒廠設備,開辦啤酒廠,發酵，錐形罐

精酿啤酒設備,啤酒廠設備,開辦啤酒廠,發酵，錐形罐

      针对以上原因,可采取以下预防措施：
      ①酵母添加量不宜超過1%,使用代數不應超過8代。並定期檢查酵母,使其保持良好的生理狀態。
      ②在雙乙酰還原末期和儲酒期,要平穩地控制錐形罐上、中、下各段溫度,使下段尤其是錐底溫度略低于中、上段溫度,以利于酵母凝聚沈降和酒液澄清,避免酵母自溶。
      ③錐形罐的后發酵期间应及时排放酵母,防止酵母过多聚集而产生自溶。
      ④注意检测酒液中癸酸酯的含量。当酵母发生自溶时癸酸酯的含量明显升高,因此它是酵母味的指示物质,可结合分析它的含量来判断酒液是否有酵母味。

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