青岛啤酒酵母与高浓酵母筛选高浓酿造酵母融合亲株100L发酵分析

Beer yeast and high concentrated yeast to screen of fusion strains with Qingdao for high concentration brewing yeast and 100L fermentation analysis

摘要: 以青岛啤酒酵母T1、T2、T3和高浓酵母G4、G6为供试菌株,筛选生长良好的酵母,为筛选具有青岛啤酒风味的高浓酵母原生质体融合亲株做指导。比较了5株酵母菌100L发酵过程中酵母菌数量、双乙酰变化及待滤酒发酵度、酸度、α-氨基氮同化率等指标。结果表明:G4和G6酵母数量变化、双乙酰变化、发酵度和α-氨基氮同化率指标优于T1、T2和T3,青岛啤酒酵母中T1和T3除酵母凝聚性外其他指标都优于T2。因此,确定T1、T3和G4、G6为融合亲株。

Abstract: In order to screen high consistency yeast parent strains of protoplast fusion, Qingdao beer yeast T1, T2 and T3 and high consistency yeast G4, G6 were used as tested strains.By comparing with the indexes in fermentation of 100L, such as yeast quantity, diacetyl change, fermentation degree, acidity, α-N assimilation rate, the result showed that the tested indexes of G4 and G6 were better than the indexes of T1, T2 and T3.Except for cohesion, the other indexes of T1 and T3 were better than those of T2.So, T1, T3 and G4, G6 were fusion parent strains.