What is tunnel pasteurization?

Tunnel Pasteurization is a heat treatment of beer, soft drinks, etc. In this form, bottles which are already filled are loaded at one end of the pasteurizer, they will then be carried through water sprays. Continuous flow of water should bring the liquid to around 60 to 70 ˚C . This will kill of most, if not all, microbes. The product is then rapidly cooled with more water before it passes out the other end.