Dehydrate Tomato in a Dehydrator/Tomato Drying Process

Jul 15, 2021

Introduction to tomato：

The flesh of tomato is thick and juicy, the seed is yellow, and the flowering and fruiting period is summer and autumn. Tomato likes light and short sunshine. Tomato grows well in the rich loam soil with deep soil layer, good drainage and rich organic matter.

Tomato processing steps：

1. Material selection
The fruits with thick flesh, less juice, full red color, but not ripe were selected, and the fruits with insufficient maturity, diseases and insect pests, and substandard damage were eliminated.
2. Peeling
Put the washed tomato fruit in boiling water for about 1 minute, cool immediately, and peel off the tomato.
3. Squeezing juice
Dig and sew the peduncle at the fruit stalk, and squeeze out the juice gently.
4. Hardening
The fruit was soaked in 0.30% CaCl2 solution for 2 hours.
5. Cleaning
Wash and harden the embryo with water, remove the embryo and drain the water.
6. Sugar stains
The tomato embryo was soaked in 30% sugar solution for 24 hours, and the sugar solution was added with 0.30% citric acid.
7. Sugar boiling
Pour the candied tomato and the soaking solution into the sandwich pot, slowly raise the temperature until boiling. After about half an hour, immerse the tomato juice and the boiling sugar solution in the porcelain jar for 12-24 hours. So repeatedly soak 2-3 times, each time to increase the sugar concentration. When the concentration of sugar solution reaches 65%, stop the fire, pour it into the porcelain jar for 8-10 hours, then take out the tomato fruit and drain the sugar solution.

Tomato drying process：

Put the drained tomato fruit into the material tray, insert the material tray into the material truck, and dry each tray at an interval of 10 cm at 60 ℃ - 65 ℃. The drying time is set at 15-20 hours. The moisture content is about 18% and the soluble solid content is 70%.

Matters needing attention：
The color of the finished product should be dark red, transparent, no sand, no sugar flow, appropriate sweet and sour, with tomato fruit flavor, sugar content of more than 65%, water content of about 18%.

Recommendation of tomato dryer/drying machine

Commercial 100-3000kg/h large amount of dehydration wide application and easy operation

Heat pump drying machine use the principle of inverse Carnot cycle. It absorbs low-temperature heat energy in the air, which becomes high-temperature heat energy after efficient heat collection and integration by the heat pump system, and is transported to the drying room for cyclic heating and drying of materials.It refers to exhausting the hot and humid air in the drying room directly to the outside of the drying room through dehumidification device, and then replenishing natural fresh air.

Hot air circle drying machine belongs to high temperature heat pump unit. Its working principle is: the working fluid of the heat pump is compressed by the compressor, becomes high temperature and high pressure gas, enters the condenser, condenses and liquefies the heat, and is used for air heating in the drying room. The moisture in the material is vaporized and evaporated by the form of hot air, and the evaporated water vapor is discharged by the moisture discharge system, thereby achieving the purpose of drying the drying material.