描述
连续发酵投产时,先将已培养成熟的液曲酒母打入1号和新1号发酵罐,在保持主发酵状态下,流加新糖化醪,并使发酵醪液外观糖保持在5~7BX;酒精含量4~6%(容量),酵母数为0.8亿/毫升左右。为了保证酵母菌的优势增殖和发酵,并起到抑制产酸细菌生长的作用,在流加新糖化醪的同时要流加硫酸,其用量为每立方米发酵醪流加0.2~0.3升,使发酵醪pH在3.6~3.8左右。两罐加满时间约需16小时。满罐后,就可将发酵醪流入2号和新2号罐。在保持主发酵状态下,向这四只发酵罐流加新鲜糖化醪。2号罐加满时间约需8小时,满罐后发酵醪流至3号和新3号罐。此时只往3号罐与前四只罐流加糖化醪,与2号罐同样方法加满3号发酵罐时间约需8小时。新3号罐不再流加新糖化醪。也就是说新糖化醪只往1、2、3号与新1号、新2号五只罐流加。待流加罐满罐后,自然流至以后各罐,直至末罐发酵结束,送去蒸馏。此时醪液流加量已趋正常,约为9立方米/时。
在上述工艺流程中,各糖化醪流加罐始终处于主发酵状态,在这一阶段中酵母处于增殖阶段,并同时伴随着发酵醪中的淀粉和糊精继续被糖化,而后几个发酵罐则起着后发酵作用。
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