Step 1: Flushing in order to eliminate residues
Step 2: Alkaline cleaning operation: alkaline detergents dissolve fat and proteins, and cleaning where harder deposits have occurred
Step 3: Intermediate water rinse
Step4: Acidic cleaning operation: for neutralizing the caustic remaining on the surfaces of the plant. The acidic detergents remove mineral deposits in the equipment (especially warm areas like in the pasteurizer)
Step 5: Final water rinse: Cold/hot water purges out the residual acid solution CIP is a closed system where recirculating cleaning solution is applied (often with nozzles) that cleans, rinses and sanitizes the equipment.
The CIP system is usually automatically controlled and the cleaning sequences are given the optimum timing for efficient cleaning of all parts of the plants.