废谷物发酵渣压榨机

废谷物发酵渣压榨

废谷物是指谷物发酵后，酒精溶液被抽出后所剩下的物质。因为它含有蛋白质，所以被用作牛饲料。对农民来说价值不大，所以如果农民愿意用卡车运输，小型酿酒厂很乐意免费赠送这些材料。

废谷物通常是湿的，含水量为80%至85%。在这种状态下，运输很重，运输时可能会滴水。而且，过几天就会变酸。

做法是用压榨机压榨谷物。通常螺旋压力机会将水分含量降低到61%到70%之间。此时，重量将减少三分之一到一半，“保质期”也将延长。

SPENT GRAINS

Spent grain is the name given to material left after the grain is fermented and the alcoholic solution is drawn off. It is used as a cattle feed because of its protein content. The value to the farmer is not great, so smaller breweries are pleased to give the material away for free if the farmer will truck it.

Spent grain is normally wet, with 80% to 85% moisture content. In this state it is heavy to haul, and it is likely to drip while being transported. Furthermore, it will go sour in a few days.

The practice is to run spent grain through a press. Typically a screw press will reduce the moisture content into the range of 61% to 70%. At this point the weight will have been reduced by a third to a half, and the “shelf life” will have been extended.