Our whey powders are obtained from cheese manufacturing which are skimmed and concentrated before being spray dried.
Whey powder can be used as a substitute for skimmed milk powder; it is used extensively in the bakery and biscuit business and as a staple for animal feed.
To produce whey powder we take the whey (6% total solids 94% water) and initially evaporate off the water so that the solids are 60% i.e. a 10x concentration.
We then ‘seed’ the whey concentrate with powder produced from a previous batch. This allows the lactose to change from a sticky version to a non-sticky version. This process takes 6-10 hours and is known as ‘crystallisation’
The concentrate is then fed into a big tower full of hot air and sprayed into fine droplets, the water evaporates very quickly and the whey solids dry into a powder.
Finally the powder is passed over a fluid bed to ‘condition’ it to the exact moisture required.