95% of juice sold in America is pasteurized
The temperature must be raised to around 150 degrees for pasteurization. I believe they could use a heat exchanger to exchange heat from the processed juice to get the pulp to a 90 degree temperature.
Telling us the "cost is low", though is not specific enough. Like IHDR stated earlier, we would like to know the numbers,...what is the cost per unit hydrogen produced....but I guess that is what they are determining.