What is Milk chilling and bulk milk coolers?
Milk chilling is the rapid cooling of raw milk after milking or collection to slow bacterial growth, done in farm bulk milk coolers, village chilling centers and plate chillers at plant intake.
Where raw milk is chilled
On large farms the bulk milk cooler is a refrigerated, insulated tank fed straight from the milking system. In India and other markets built on smallholder supply, milk goes to bulk milk coolers at village collection points or to chilling centers before a tanker takes it to the processing plant. Each stage adds a refrigeration load that may run on grid power, a diesel generator or both.
What sets chilling cost
The cooling duty depends on how much milk arrives, how warm it is and how quickly it must reach storage temperature. Capacity is rated in tons of refrigeration or kilowatts, and efficiency is the cooling delivered per unit of electricity. Pre-cooling milk through a plate cooler with well water or chilled water reduces the compressor's share of the work. Time and temperature limits for raw milk come from the food regulator in each market and should be read from the current rule.
How Aqueduct watches a cooler fleet
Each cooler gets an electricity meter and a milk temperature probe, which together give energy per liter chilled and minutes to reach set point for every collection. aQ PredictIQ watches compressor run time and condenser behavior for drift across the fleet. The device Health tab shows which remote site has a sensor with a weak connection or low battery, so a field visit is planned instead of discovered.