摘要
己酸菌液发黑变臭的原因为培养过程中污染产硫细菌;培养容器中Fe2+和S2-反应生成FeS,而S2-遇到外加的Cu2+后Cu产生黑色沉淀。改进措施:①种子罐的灭菌改用甲醛溶液加高锰酸钾熏蒸法。②采用不锈钢小卡氏罐培养种子。③种子培养采用烧瓶培养法,并且定期采用热处理纯化菌种,有效地杜绝了染菌的现象。(陶然)
The causes of blackening of caproic acid bacteria solution were analyzed as follows: contamination with thiogenic bacteria during the culture of the solution; action of Fe2+ ion and S2-ion to form FeS, and action of S2-ion and added Cu2+ ion to produce black precipitate. The relative solutions included: ①sterilization of seeding tank by formalin coupled with potassium permanganate fumigation; ②application of stainless small tank for seed culture;③seed culture by flask culture method. Besides, periodical heat treatment applied to purify bacteria species and to eliminate contamination effectively. (Tran. by YUE Yang)
出处
《酿酒科技》
北大核心
2005年第3期55-56,共2页
Liquor-Making Science & Technology
关键词
烈性酒
己酸菌液
发黑原因
改进措施
liquor
caproic acid bacteria solution
blackening causes
solutions
