The method used at Orval is known as topfermentation.
发酵变酸以发酵的方式变酸。
2
Created in 1933 at the Dubuisson Brewery, Bush Amber is the strongest and one of the oldest of all Belgian beers brewed by topfermentation.
由创建于1933年的迪比森酿酒厂酿造，可谓所有古老的比利时上层发酵啤酒中酒精最强烈的一款。
3
Spraying and inoculation device is installed on top part which enables inoculation and timely humidity adjusting of solid materials during fermentation process.