top fermentation

1. The method used at Orval is known as top fermentation.
   欧瓦啤酒发酵的这种方法称为上面发酵。
2. Studies on the Top Fermentation of Wheat Beer
   100m~3发酵罐上面发酵小麦啤酒生产工艺技术研究
3. Wheat beer was produced from wheat malt ( accounting for 40% of the raw material) by top fermentation yeast.
   小麦啤酒是以小麦麦芽为主要原料（占原料总量的40%以上），采用上面酵母发酵酿制而成。

noun

1. a violent kind of alcoholic fermentation at a temperature high enough to carry the yeast cells to the top of the fermenting liquid
   1. top fermentation uses a yeast that ferments at higher temperatures than that used for bottom fermentation