The head beer and ending beer in beer brewing was used as main raw materials coupled with waste barm digest and rice starter liquid and right amount of edible alcohol to produce nutritional white vinegar by liquid fermentation.The technical points cov-ered the following aspects:the proliferation and culture and acclimatization of acetic acid bacteria;the preparation of waste barm di-gest;the preparation of fermentation liquid;the fermentation of acetic acid;and decoloration and aftertreatment.The applicat...

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