(1) Selection of raw materials
Choose fresh, ripe tomatoes with bright red color and no pests and diseases as raw materials.
(2) Cleaning
Remove sediment, residual pesticides and microorganisms attached to fruits.
(3) Choose
Remove rotten, diseased or poorly colored tomatoes.
(4) thermal crushing
Tomato crushing methods include hot crushing and cold crushing. Thermal crushing means that tomatoes are heated to 85℃ immediately after crushing. Due to the method of thermal pulverization, pectin esterase and polygalacturonase in tomato pulp can be passivated in time, and pectin substances remain in large quantities. Finally, the obtained tomato product has high consistency.
(5) Beating
The purpose of beating is to remove the skins and seeds of tomatoes. Two or three agitators are used for beating. The screen aperture of the first stirring screen is 0.8 ~ 1.0 cm, and that of the second stirring screen is generally 0.4 ~ 0.6 cm. The speed of agitator is generally 800 ~ 1200 rpm. The amount of skin residue obtained after beating should generally be controlled at 4% ~ 5%.
(6) vacuum concentration
Concentration methods include vacuum concentration and atmospheric concentration. Due to the high temperature of atmospheric concentration, the color and flavor of tomato pulp will decrease when heated, and the product quality will be poor. The vacuum concentration temperature is about 50℃ and the vacuum degree is above 670 mm Hg.
(7) Drying of tomato concentrate?
There are many drying methods of tomato concentrate, mainly including freeze drying, puffing drying, roller drying, foam layer drying and spray drying.
Introduction: Tomato powder is a kind of compound seasoning powder with tomato flavor. It is made of Xinjiang high-quality mature tomatoes into the original sauce, which is made into natural tomato powder after spray drying, and then carefully compounded.