Adjustment of and Controls on the Fermentation Temperature of Beer in Tapered Shaped Tank
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The key points to adjustment of and controls on the fermentation temperature of beer in tapered shaped tank were as fol-lows: selection of proper control techniques; controls on the effects of the length of fermentation on temperature; controls on the ef-fects of temperature adjustment on beer flavor; controls on temperature changes during chief fermentation period and biacetyl reduction period; temperature controls and adjustment in temperature dropping periods, generally, temperature dropped from 5~7 ℃to 0~-1℃ with the dropping rate 0.1 ℃/h; and temperature adjustment during cooling phase and storage.(Tran. by YUE Yang)Cite
The contrast tests analysed the differences of temperature change in 24 hours and gas production in 6 days between semi-underground dimple-jacket fermentation tank and ordinary fermentation tank,the results showed that temperature in 24 hours in semi-underground dimple-jacket fermentation tank changed slowly,which was little affected by outside temperature change,the high temperature lasted for a long time in favor of the fermentation of microorqanism;total quantity of gas production was large and last for a long time.
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