Herbs, natural flavourings, sugar, brewer's yeast and spring water were then added, and the liquid was transferred into wooden vats where it was left to ferment.
A number of other neutralising agents are available (pulverised fuel ash-based grouts, cattle manure, whey, brewer's yeast) many which solve a waste disposal problem from another industry.
Many types of yeasts are used for making many foods: baker's yeast in bread production; brewer's yeast in beer fermentation; yeast in wine fermentation, and for xylitol production.