This is a video published by Tetra Pak, that describes research they undertook to establish whether the standard fruit juice pasteurisation conditions could be reduced to save energy while still guaranteeing shelflife and avoiding product “damage”.
They found that, for orange juice, the second pasteurisation could be reduced from 95C for 15 seconds to 80C. This reduces cost of energy for orange juice filling at 22 000 l/h over 500 shifts a year by 19% and carbon footprint by 20%.
They also found that the across plate temperature difference could be increased from 5 to 20C. This would have significant impact on the heat transfer surface required and hence the capital cost of the pasteuriser.