Method for processing dewatered tomatoes

A processing method, tomato technology, applied in the direction of preservation of fruits/vegetables by dehydration, preservation of fruits/vegetables by heating, preservation of fruits/vegetables by freezing/refrigeration, etc., which can solve the problem of low peeling efficiency, failure to peel and peeling of deformed areas High difficulty and other problems, to achieve the effect of high peeling efficiency and less waste of raw materials

Active Publication Date: 2013-12-25
8 Cites 8 Cited by

AI-Extracted Technical Summary

Problems solved by technology

[0004] At present, the traditional peeling machine adopts the rolling friction peeling of the drum separator. Because the shape and size of the raw materials are different, the waste rate of raw materials in this peeling method is ...
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The invention relates to a method for processing dewatered tomatoes, and belongs to the technical field of food processing. The method comprises the steps: sorting, cleaning, blanching, machine-cutting, spin-drying, stoving, cooling, sorting by a machine, manually sorting, and packaging. Compared with the prior art, the method has the advantages of high peeling efficiency and small raw material waste because the tomatoes are cleaned and peeled by adopting ultrasonic waves.

Application Domain

Fruits/vegetable preservation by heatingFruits/vegetable preservation by freezing/cooling +2

Technology Topic

BiologyMegasonic cleaning +2


  • Experimental program(1)

Example Embodiment

[0025] Example
[0026] A processing method of dehydrated tomatoes includes the following steps:
[0027] (1) Select tomato raw materials and eliminate defective products in tomatoes: rotten, green and immature tomatoes, straw, metal, hair and other foreign objects;
[0028] (2) Ultrasonic cleaning and peeling: Put the selected tomatoes in saturated salt water containing gravel with a diameter of 1.5 to 2.0 mm, and apply ultrasonic waves to the saturated salt water using a piezoelectric ultrasonic generator. The frequency and sound intensity of the ultrasonic waves are They are 25KHZ~50KHZ and 1.5~3W/cm 2 , The duration is 60 to 150 seconds, then take out the tomatoes and rinse with water;
[0029] (3) Blanching and cooling: blanch the washed and peeled tomatoes with hot water at a temperature of 95~100℃ for 5 minutes, then remove them and place them in cold water to cool;
[0030] (4) Machine cutting: Use a cutting machine to cut the blanched tomatoes into cubes;
[0031] (5) Spin-drying: Send the diced tomatoes to the centrifuge to spin-dry;
[0032] (6) One-time drying: Put the diced tomatoes after centrifugation into an oven for drying, the treatment temperature is 75±5℃, and the treatment time is 2~4h;
[0033] (7) Secondary drying: Put the diced tomatoes in the batch with a moisture content of more than 7% in the previous step into an oven for drying. The treatment temperature is 70±5℃, and the treatment time is 2~4h to ensure that the water content is less than 7 %;
[0034] (8) Cooling: Use a blower to cool the dried tomato diced to reduce the temperature to below 40°C;
[0035] (9) The first machine selection: According to the particle size requirements of the product, select the corresponding specifications of the screen to screen the dried tomato diced, and then perform magnetic separation to remove light impurities, metal, powder and strips;
[0036] (10) Manual sorting: mainly remove foreign bodies, insects and flies, yellow leaves, old roots and long strips that have not been removed by the previous sieve;
[0037] (11) The second machine selection: using screening, winnowing, magnetic separation, and metal detection, it mainly removes hair, mud, gravel, and metal that cannot be removed by manual selection.
[0038] (12) Weighing and packaging.
[0039] In this embodiment, in step (10), manual selection is performed in a clean room with a room temperature control of 20±2°C and a relative humidity control of ≤50%; after each selection is completed, use an ultraviolet lamp and an ozone generator to Disinfect the sorting room.
[0040] After step (12), a spot check is also carried out: the material moisture, microorganisms and the requirements specified by the customer are inspected; the stock after the spot check is stored: the material storage temperature is ≤12℃, the relative humidity is ≤70%, and the finished product warehouse needs to be clean and dry , Hygiene, do not receive direct sunlight, and mark.
[0041] In step (2), first a small batch test run, according to the test run conditions, adjusted to confirm the specific parameter settings of the batch, and then mass production, and monitor the production situation at any time, and adjust the parameters.
[0042] This is the lighter glutenite (density 1.2~1.4g/cm 3 ), after breaking into particles 1.5mm~2.0mm, replace every 6~12 hours of operation.


Diameter1.5 ~ 2.0mm

Description & Claims & Application Information

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