From milk to cheese: coagulum, cheese and whey

Useful to know

Cheese collects dairy ingredients in a structure that differs substantially from the source fluid. The Tetra Pak Handbook describes the formation of a casein network through coagulation that can be induced in different ways. These include lowering the pH and action of rennet enzymes. [1] This is a good basis for understanding diversity. Not all cheeses go through the same exact recipe, though they share common technological concepts and similar processing tasks.

After forming a coagulum, it can be cut into parts to help release whey. In the described technologies, particle size and subsequent operations are involved in moisture management. [1] Slitting is thus not just shaping for convenience. It has a role in changing the structure. It is useful for the reader to see each operation through its task, instead of the process being perceived as a series of unrelated traditional movements with no technological significance.

Whey is the liquid residue of cheese and other dairy products. It contains soluble ingredients such as lactose, proteins and minerals and is not just pure water. [2] This distinction explains why its separation changes the composition of the remaining mass. It also shows why whey can be a raw material for other processes. In milk technology, different streams can have their own purpose, instead of one being seen solely as an unnecessary remnant of the other.

Tetra Pak distinguishes whey obtained in rennet coagulation and more acidic flows from other technologies. The manual considers subsequent filtering and separation of individual fractions. [2] Therefore, the common name does not mean a completely uniform liquid from each production line. The source product and the way it is received matter. This is also a useful analogy for the cheese itself: similarity in appearance is not sufficient information about all the processes that created the final structure.

Let's imagine a comparison of fresh soft cheese and a hard ripe product. For culinary use, it is necessary to observe moisture, friability and the way of mixing or cutting. The common origin of milk does not prove the same behavior in a recipe. This is an example of choice by function, not ranking. If the recipe expects a certain structure, the replacement should be a conscious change and the result judged according to it, instead of expecting each cheese to perform the same task.

The basic vocabulary can be arranged as milk, netting, whey separation and subsequent operations according to the type of cheese. This scheme does not replace a production instruction, but helps to understand the names in a more detailed narrative. Sirenery combines composition, microorganisms, enzymes and physical processing. When these roles are distinguished, the rich variety of cheeses becomes more explicable, and the consumer can more accurately relate the selected product to its texture and purpose in the kitchen.