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Process for peeling skins of yams with low-alkali and low peeling agent circulating water composite method

A peeling agent and circulating water technology, applied in the peeling of vegetables or fruits, food science, application, etc., can solve the problems of lye and peeling agent loss, pollute waste water, increase production costs, etc., to maintain effective concentration, The effect of reducing production costs and saving production costs

Inactive Publication Date: 2011-11-16
FUJIAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This process can remove the yam epidermis more thoroughly, and the effect is good, but because caustic soda with a concentration of 0.5% is used, it is highly corrosive and causes great damage to equipment. At the same time, high-pressure water jetting is used in the peeling process. , resulting in large water consumption, serious loss of lye and peeling agent, which increases production costs and produces a large amount of polluted wastewater

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 1. Pretreatment

[0023] 200 kg of qualified Chinese yam will be simply washed in the washing pool to remove impurities such as soil;

[0024] 2. Peeling

[0025] Put the pretreated Chinese yam into 2000 kg of peeling aqueous solution containing NaOH and peeling agent. The temperature of the peeling aqueous solution is 85°C. At the same time, turn on the circulating water pump to circulate the peeling aqueous solution at a high speed. Huaishan.

[0026] Contain 4 kilograms of NaOH and 2 kilograms of peeling agents in 2000 kilograms of peeling aqueous solutions.

[0027] 3. Neutralization and rinsing

[0028] Use 0.2% sodium sulfite solution and 0.2% citric acid solution to neutralize and protect the color, and finally rinse with water. After rinsing, it can be seen that the epidermis of Huaishan has completely fallen off, and the flesh is smooth without epidermal attachments, and the shape is complete.

Embodiment 2

[0030] 1. Pretreatment

[0031] 100 kg of selected qualified yams are simply washed in the washing pool to remove impurities such as soil;

[0032] 2. Peeling

[0033] Put the pretreated yam into 1000 kg of peeling aqueous solution containing NaOH and peeling agent. The temperature of the peeling aqueous solution is 85°C. At the same time, turn on the circulating water pump to circulate the peeling aqueous solution at a high speed. Huaishan.

[0034] Contain 1 kg of NaOH and 2 kg of peeling agent in 1000 kg of peeling aqueous solution.

[0035] 3. Neutralization and rinsing

[0036] Use 0.2% sodium sulfite solution and 0.2% citric acid solution to neutralize and protect the color, and finally rinse with water. After rinsing, it can be seen that the epidermis of Huaishan has completely fallen off, and the flesh is smooth without epidermal attachments, and the shape is complete.

Embodiment 3

[0038] 1. Pretreatment

[0039] 50 kg of qualified Chinese yam will be simply washed in the washing pool to remove impurities such as soil;

[0040] 2. Peeling

[0041] Put the pretreated yam into 1000 kg of peeling aqueous solution containing NaOH and peeling agent. The temperature of the peeling aqueous solution is 85°C. At the same time, turn on the circulating water pump to circulate the peeling aqueous solution at a high speed. Huaishan.

[0042] Contain 2 kg of NaOH and 1 kg of peeling agent in 1000 kg of peeling aqueous solution.

[0043] 3. Neutralization and rinsing

[0044] Use 0.2% sodium sulfite solution and 0.2% citric acid solution to neutralize and protect the color, and finally rinse with water. After rinsing, it can be seen that the epidermis of Huaishan has completely fallen off, and the flesh is smooth without epidermal attachments, and the shape is complete.

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Abstract

The invention relates to a process for peeling the skins of yams with a low-alkali and low peeling agent circulating water composite method, which comprises the following steps of: first preprocessing, then peeling with a peeling solution and finally neutralizing and bleaching with a neutral acid and is characterized in that 1) during preprocessing, yam raw materials are selected and simply washed in a washing tank to remove mud and other impurities; and 2) the preprocessed yams are thrown in the peeling solution containing NaOH and a peeling agent, the peeling solution is of a temperature of 85DEG C, a circulating water pump is simultaneously started to promote the peeling solution to flow at a high speed in a circulating manner, and peeled yams are fished out after being soaked and peeled for 10 minutes. Compared with the prior art, the invention has the advantages that due to the use of the NaOH and the peeling agent in a low concentration, the usage is greatly reduced, and the production cost is saved; due to the adoption of a high speed circulating flow technology, the effective acting concentration of the peeling solution is kept, and water is saved; and as the contents of the NaOH and the peeling agent in discharged waste water are low, the waste water is easy to process, and the requirement for clean production is met.

Description

technical field [0001] The invention designs a method for removing the epidermis during the processing of Chinese yam, and belongs to the technical field of agricultural product processing. technical background [0002] Huaishan ( Dioscoea opposita ) of the genus Dioscorea ( Dioscorea ), the southern part of my country is called Huaishan, and the northern part is called yam. Modern research proves that Chinese yam is rich in protein (including 18 kinds of amino acids), starch, sugar (mannose, glucose, galactose), mucilage, vitamins (riboflavin, vitamin C, etc.), inorganic elements and other elements , such as calcium, magnesium, copper, manganese, chromium, molybdenum, zinc, iron, strontium, vanadium, barium, and also contain active substances such as saponin, choline and glycoprotein. It is a plant with both medicine and food promulgated by the Ministry of Health. It has high nutritional value, medicinal value and economic value. [0003] As one of the three ancient w...

Claims

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Application Information

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IPC IPC(8): A23N7/01
Inventor 陈由强张文森黄儒珠叶冰莹陈炳炎
Owner FUJIAN NORMAL UNIV
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