How long does it take to ferment steamed bread with yeast at room temperature of 20 degrees?

In order to maintain the maximum activity of yeast, temperature control is the most important, that is, the room temperature and dough temperature should be controlled between 24℃ and 30℃ as far as possible during production. Generally speaking, the fermentation time is controlled at15 ~ 25min.

Edible yeast refers to dry yeast powder or granular products that do not have the ability of fermentation and reproduction and are eaten by people. It can be obtained by recycling yeast mud from brewery or by special cultivation and drying according to the requirements of human nutrition. The United States, Japan and some European countries add about 5% edible yeast powder to common foods such as bread, cakes, biscuits and scones to improve the nutritional value of food.

Extended data:

Yeast is a commonly used eukaryotic receptor cell in gene cloning experiments, and it is as convenient to culture yeast as Escherichia coli. There are many kinds of yeast cloning vectors. Yeast also has plasmids. This 2pm long plasmid is called 2um plasmid, which is about 6 300bp. ?

The amount of yeast added during stirring should be determined according to the following conditions:

It is cold in spring, autumn and winter, so yeast can be dissolved in warm water at about 35℃ first, which not only ensures the uniform dispersion of yeast in dough, but also receives good fermentation effect. But the water temperature should not exceed 40℃, otherwise the yeast activity will be destroyed or killed.

In midsummer, when the room temperature exceeds 30℃ or above, the mixer has no temperature control system. In order to control the high temperature of dough mixing, ice cubes are often added during mixing. At this time, yeast should be added in the final stage of dough mixing, which can be dried on the dough and stirred evenly.

References:

Yeast powder _ Baidu Encyclopedia