Preparing Milk for Processing

Got Milk What is Milk?

It is the normal secretion of the mammary glands of all mammals

Its primary purpose is to nourish the young of the species

The Cow Principal source of milk for human consumption

in the United States

A great deal of variety among the milk of different animals exists which affects processing

The Cow The most important

factor that determines the composition of milk is the breed of cow.

Preparation of Milk for Processing Dairies are inspected by veterinarians, they

are regulated by States and Cities.

Essential to protect public health concerns

Preparation of Milk for Processing Cold temperatures and environmental

conditions of cattle are important to milk quality.

Stainless steel is recommended for use in equipment because it does not react with milk to cause off-flavor

Preparation of Milk for Processing The milking operation stimulates muscles in

the udder of the cow causing let-down of milk into teat canals.

The machines work like vacuums and suck the milk into receiving vessels that lead to a holding tank

Holding Tanks Refrigerated to cool the milk to less then 8

degrees C in order to control bacterial multiplication

Milk should not stay in the holding tanks for more than 2 days before transporting.

Tank Trucks Milk is shipped in sanitized

milk cans by trucks from smaller dairies or by tank truck transportation from larger dairies.

Drivers inspect the milk to see if it is cold and has a good aroma.

They also take a sample for further processing

Inspection Standards Samples are analyzed for fat and solid

contents and microbiological data.

Tests are conducted to determine bacterial count, determination of sediment, and evaluation of milk flavor.

Grade A Pasteurized Milk Ordinance

1978 – Recommendations of the U.S. Public Health Services/ Food and Drug Administration is used as a guide to the setting of standards of milk quality

Milk Flavor Can acquire off-flavor Cows eating unusual feed and or by

absorption of odors and chemicals. Poor milk handling equipment Copper causes oxidized flavors that are

metallic, oily and fishy.

Health Consideration of Dairy Products

Milk and other dairy products are a significant amount of nutrients for humans.

Milk is a good source of protein, calcium, and riboflavin.

3 C’s of Milk Always Keep Milk…..

Clean!

Cold!

Covered!

Health Consideration of Dairy Products

Cow’s milk unlike human milk must be modified to meet nutrient requirements of infants.

Milk is low in iron which babies need in order to prevent anemia.

Milk can help to prevent osteoporosis, acne problems, poor eyesight, and fragile teeth.

Trends in Consumption Since 1975 the available milk supply has

increased. Campaign slogans….. Got Milk? Milk does a Body Good! Three A Day (Milk, Yogurt, Cheese)

Review What is the most

important factor that determines the composition of milk?

Why do we want to keep milk in stainless steel containers?

How long should milk stay in holding tanks?

What can milk help prevent?