Food - a fact of life · Transcript · · Updated
Milk: From the farm to you – Transcript
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- Milk arrives at the dairy in special tankers from local farms and is tested for quality before being pumped into storage silos.
- The milk travels through a separator to divide the milk from the cream, and a certain amount of cream is added back depending on the milk type.
- Pasteurization heats the milk through metal plates to kill harmful bacteria, and after cooling, it is packaged in containers using a filler machine.
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milk from the farm - you milk arrives at this dairy every day from local farms it's transported in special tankers like this one which can carry an enormous 28,000 litres of milk when it arrives at the dairy a sample of milk is taken from the tanker to check the quality before it is processed once
it's been tested the milk is pumped from the tanker into huge storage silos like this one the milk is kept cool throughout the whole process to keep it fresh it then travels through pipes into this machine called a separator where the milk is spun 4,000 times a minute this is done to separate the milk from the cream once the separation is complete a
certain amount of cream is added back in depending on what kind of milk is being made whole milk has almost all the cream added back in semi skimmed milk has some cream and skimmed milk has no cream added back in the milk is then homogenized this process mixes the cream thoroughly through the milk to make sure
it doesn't just sit on the top next the milk is pasteurized it is passed through metal plates that heat it to 72 degrees Celsius for 15 seconds pasteurization is a process that kills any harmful bacteria that might be found in the milk so the dairy know that it is safe to drink after pasteurization the milk is cooled
as this helps to keep it as fresh as possible and stops it going sour it is then ready to be taken to this machine which is called a filler where empty containers that have been labeled and decoded are waiting to be filled with milk this machine can fill up to 40,000 litres of milk every hour that's the same as 6 bottles per second the different kinds of milk are given
different colored lids so you can quickly see what sort it is finally the milk is put into the cold stone which is just like a huge fridge until it's ready to be loaded onto a special refrigerated lorry and delivered to your local storm