Un projet de refroidisseur de lait pour l'Afrique subsaharienne a reçu une subvention de 1 million de dollars (en anglais)

Un ingénieur de l'Université de Géorgie a reçu 1 million de dollars pour continuer à travailler sur un refroidisseur de lait afin d'aider les producteurs laitiers, en particulier ceux de l'Afrique subsaharienne, qui n'ont pas accès à la réfrigération.
A University of Georgia engineer received USD 1 million (735,000 €) from USAID, in partnership with the Swedish Government, Duke Energy Corporation, the German Government and the Overseas Private Investment Corporation to continue working on a milk cooler designed to help dairy farmers, particularly those in sub-Saharan Africa, who lack access to refrigeration.

Keeping milk safe and healthy to drink is a challenge in areas without electricity. The milk cooler, developed by William Kisaalita, professor of biological and mechanical engineering in the UGA College of Engineering, uses the principle of evaporative cooling to quickly bring the temperature of milk to a safe holding temperature.

Kisaalita developed a refrigeration unit using the principle of evaporative cooling powered by biogas. The biogas is produced through the collection of cow manure-an abundant resource on dairy farms. The milk cooler design includes a container of milk that is surrounded by water. A vacuum pump depressurizes the container and zeolite, an adsorption silicate, captures the evaporating water causing the temperature inside the cooler to drop. The milk is chilled and kept fresh overnight allowing farmers to sell their milk the next day. Current dairy farmers may lose as much as 50% of their daily milk due to inadequate cooling technology.