Sour milk consists of curds and whey. The curds are the solid part that forms when milk coagulates, while the whey is the liquid portion that remains after the curds are separated. This process typically occurs due to the action of bacteria that produce lactic acid, leading to the fermentation of milk.
To make cheese from sour milk, you can heat the sour milk until it separates into curds and whey. Then, strain the curds and press them to remove excess liquid. Finally, shape the curds into a cheese mold and let it age for a few weeks to develop flavor.
Probably by someone leaving milk out to sour, causing it to split into curds and whey. Curds are the most basic form of cheese.
I'm not sure exactly what you're asking, but I'll give a brief example as to how curds are made, and hopefully it will cover your question. Curds are made by curdling milk with an acid like vinegar, lemon juice, or rennet. Raw milk can be curdled by adding lactic acid bacteria, which is then used to make sour milk cheeses. By increasing the acid in milk, it causes the milk proteins to bind to each other, resulting in the curds. When making curds, the liquid that rises to the top, that is drained off is known as whey.
Check the best before date on it. If milk is kept after the best before date, chances are it's not as good. Also smell it to see if it smells sour or not. If it doesn't smell sour it's still good to drink. The next test is only if the milk itself looks kind of suspicious. Pour a little out on a teaspoon to see if it's consistent and doesn't have curds (or lumps) in it. If there's curds, throw it out.
Assuming you don't keep it in a refridgerator - It will eventually go sour, and separate into the curds (solids) and whey (liquid) components.
curds and whey is a dairy product made by curdling milk. Curds are solid; whey is liquid.
The term for the lumps that form when an acid is added to milk is curds.
the sour milk stank
the solid mass are the proteins in the milk reacting with the acidic vinegar. Sour cream is made in the same way by adding lemon juice (acid) to heavy cream. The acid will react with the protein in the cream and thicken it.
Curds are a dairy productobtained by coagulating milk in a process called curdling. Whey is the liquid remaining after milk has been curdled and strained. The whole mess is similar to cottage cheese.
This product is called sour milk. It causes milk for form a coagulate. It is not a precipitate as it doesn't separate into a solid and a liquid. Cheese making would use that method.
Milk curds are formed during cheese making when enzymes or acid are added to milk, causing the proteins in the milk to coagulate and separate from the liquid whey. This process creates solid curds that can be further processed into cheese.