Milk powder is milk in dried form. It is thus dried for a number of reasons including better storage, longer life or easy transit and shipment.

Most if not all ranges and types of milk powder does not contain fat. This would require that the fat content in the milk used in this process be removed. Removal of the fat is done using a cream separator. The cream from this separation process is also dried by another process or used in the processing of butter or other products. Cream separators play a major role to ensure that the quality of milk powder is not compromised and that the process flows smoothly.

Constant and speedy production is ensured due to the time and losses saved if the milk would be let to sit and skimmed by used of gravity as was done traditionally. Losses were due the milk going bad when left to sit. This was particularly so because the milk used in the process is mostly un homogenized milk.

Milk powder plants are used in the processing of milk into powder. These plants mainly consist of cream separators, multiple effect evaporators –that can have or lack a pasteurizer-and a spray drier. A Cream separator removes the fat content from milk from the milk to form skim milk that is then used for processing of milk powder. A multiple effect evaporator is used for concentrating dilute liquid milk from a cream separator having initial concentration range of up to 8-10%.This dilute milk is concentrated up to a level of 46-48% and then traded in a spray drier.

A multi effect evaporator as the name suggests is used for two main functions in.The machine has a calendria; which in essence is a shell with tubes bundled together. Steam is here used to evaporate the water present in the liquid milk from a cream separator into the desired concentration. The concentrated milk alongside with vapor is passed on onto a vapor liquid separator.Vapour is separated and allowed to the next calendria for the same effect on the milk.

When the milk has reached the optimum concentration it is collected at the final evaporator, and condensation of the vapor takes place here. The result is a moisture free form of milk that can be used for a variety of purposes commercially, medicinally or domestically. Milk powder is also used by the military and hikers as a portable source of nutrition. It is used widely by aid organizations as the United Nations to provide nutrition in camps.