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Curd is obtained by coagulating milk in a sequential process called curdling. It can be a final dairy product or the first stage in cheesemaking . [ 1 ] The coagulation can be caused by adding rennet , a culture , or any edible acidic substance such as lemon juice or vinegar , and then allowing it to coagulate.
Cheese curd prior to pressing Silky tofu (kinugoshi tofu). Milk and soy milk are curdled intentionally to make cheese and tofu by the addition of enzymes (typically rennet), acids (including lemon juice), or various salts (magnesium chloride, calcium chloride, or gypsum); the resulting curds are then pressed.
Curd is made by bacterial fermentation of milk. In this process, lactose in milk is converted into lactic acid by several probiotic microorganisms.The species involved in the fermentation depends on the temperature and humidity of the environment and may include Lactococcus lactis, Streptococcus diacetylactis, Streptococcus cremoris, Lactobacillus delbrueckii subsp. bulgaricus and ...
Chymosin, its key component, is a protease enzyme that curdles the casein in milk. In addition to chymosin, rennet contains other enzymes, such as pepsin and a lipase. Rennet has traditionally been used to separate milk into solid curds and liquid whey, used in the production of cheeses.
Milk is skimmed to remove the fat, then the milk is soured so that the casein is precipitated as milk curd. The curd is washed (removing the whey), and then the curd is pressed to squeeze out the water (it may even be dried to a powder). The casein is mixed with alkali (usually both sodium and calcium hydroxide) to make glue.
A glass of soured milk whey. Whey is the liquid remaining after milk has been curdled and strained. It is a byproduct of the manufacturing of cheese or casein and has several commercial uses. Sweet whey is a byproduct resulting from the manufacture of rennet types of hard cheese, like cheddar or Swiss cheese.
Stored in brine, it can easily be shipped, and it is known worldwide for its use on pizza. But not all stretch-curd cheeses are fresh; the Italian provolone, Ragusano, caciocavallo and many others are hard or semi-hard, and aged. Oaxaca cheese from Mexico is semi-hard, but not aged.
Cuajada is a dairy product traditionally made from sheep's milk, but now it is more often made industrially from cow's milk.It is popular in the northern regions of Spain (Asturias, Cantabria, Basque Country, Navarre, Aragon, Castile and Leon, and La Rioja).