Purebred microorganisms were employed to upgrade the fermentation process of Zhejiang rosy vinegar. The fermentation cycle was greatly shorten from 5 months to 72 d. The transformation rate of raw materials was increa...Purebred microorganisms were employed to upgrade the fermentation process of Zhejiang rosy vinegar. The fermentation cycle was greatly shorten from 5 months to 72 d. The transformation rate of raw materials was increased from 1:4.5 in the traditional fermentation to 1:5 or more in the upgraded fermentation. The content of organic acids in the traditional vinegar (TRV), the upgraded vinegar (UPV) and the submerged fermentation vinegar (SFV) were also investigated by HPLC. No significant difference was found regarding the proportion of phenylethanol to the total volatile components in UPV (7.47% ± 0.00324%) and TRV (7.23% ± 0.00329%), but it was significantly higher than that in SFV (2.26% ± 0.00143%). This study provides deep insight into upgrading the fermentation process of Zhejiang rosy vinegar by purebred microorganisms.展开更多
采用回流搅拌发酵罐、气动搅拌发酵罐和机械搅拌发酵罐,对浙江玫瑰醋冲缸放水之后进行机械化酿造;并对发酵结束后的浙江玫瑰醋得率、有机酸和挥发性成分进行测定,比较不同发酵罐和搅拌频率对浙江玫瑰醋品质的影响。结果表明:用气动搅拌...采用回流搅拌发酵罐、气动搅拌发酵罐和机械搅拌发酵罐,对浙江玫瑰醋冲缸放水之后进行机械化酿造;并对发酵结束后的浙江玫瑰醋得率、有机酸和挥发性成分进行测定,比较不同发酵罐和搅拌频率对浙江玫瑰醋品质的影响。结果表明:用气动搅拌发酵罐和机械搅拌发酵罐,搅拌频率为5 d 1次的酿造方式,可以将浙江玫瑰醋得率从传统的7.84 kg(1 kg大米生产醋质量)分别提高到8.25 kg和8.13 kg;回流搅拌发酵罐生产的玫瑰醋乳酸含量较高,机械搅拌发酵罐可以提高玫瑰醋中非挥发有机酸酸含量,对有机酸含量进行主成分分析和聚类分析发现,不同发酵罐对浙江玫瑰醋有机酸组成有较大影响,搅拌频率对有机酸影响不大;搅拌频率的增加可以增加玫瑰醋中氨基酸含量;用回流搅拌发酵罐生产的浙江玫瑰醋挥发性成分显著低于其他玫瑰醋,对挥发性成分含量进行主成分分析和聚类分析发现,发酵罐对玫瑰醋中挥发性成分影响较大,搅拌频率影响较小。采用气动搅拌发酵罐并且搅拌频率为5 d 1次方式生产的玫瑰醋与传统玫瑰醋品质最接近。展开更多
文摘Purebred microorganisms were employed to upgrade the fermentation process of Zhejiang rosy vinegar. The fermentation cycle was greatly shorten from 5 months to 72 d. The transformation rate of raw materials was increased from 1:4.5 in the traditional fermentation to 1:5 or more in the upgraded fermentation. The content of organic acids in the traditional vinegar (TRV), the upgraded vinegar (UPV) and the submerged fermentation vinegar (SFV) were also investigated by HPLC. No significant difference was found regarding the proportion of phenylethanol to the total volatile components in UPV (7.47% ± 0.00324%) and TRV (7.23% ± 0.00329%), but it was significantly higher than that in SFV (2.26% ± 0.00143%). This study provides deep insight into upgrading the fermentation process of Zhejiang rosy vinegar by purebred microorganisms.
文摘采用回流搅拌发酵罐、气动搅拌发酵罐和机械搅拌发酵罐,对浙江玫瑰醋冲缸放水之后进行机械化酿造;并对发酵结束后的浙江玫瑰醋得率、有机酸和挥发性成分进行测定,比较不同发酵罐和搅拌频率对浙江玫瑰醋品质的影响。结果表明:用气动搅拌发酵罐和机械搅拌发酵罐,搅拌频率为5 d 1次的酿造方式,可以将浙江玫瑰醋得率从传统的7.84 kg(1 kg大米生产醋质量)分别提高到8.25 kg和8.13 kg;回流搅拌发酵罐生产的玫瑰醋乳酸含量较高,机械搅拌发酵罐可以提高玫瑰醋中非挥发有机酸酸含量,对有机酸含量进行主成分分析和聚类分析发现,不同发酵罐对浙江玫瑰醋有机酸组成有较大影响,搅拌频率对有机酸影响不大;搅拌频率的增加可以增加玫瑰醋中氨基酸含量;用回流搅拌发酵罐生产的浙江玫瑰醋挥发性成分显著低于其他玫瑰醋,对挥发性成分含量进行主成分分析和聚类分析发现,发酵罐对玫瑰醋中挥发性成分影响较大,搅拌频率影响较小。采用气动搅拌发酵罐并且搅拌频率为5 d 1次方式生产的玫瑰醋与传统玫瑰醋品质最接近。
