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Method for recycling pectin in orange can acid treatment water

A canned acid and water treatment technology, which is applied in the field of waste water reduction and comprehensive utilization of canned fruits and vegetables, can solve the problems of high equipment cost, large floor area, and complicated process, and achieve low equipment purchase costs, small floor space, and The effect of low cultivation cost

Active Publication Date: 2016-08-03
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The key process of pectin extraction is the separation of pectin from the extraction solution. The existing process uses spray drying or organic reagent precipitation or salting out and then separates, which has problems such as complex process, high equipment cost, and large floor space. The cost of equipment consumables for the pre-treatment process of membrane separation and concentration is also high, and the organic solvent used in the precipitation step increases the cost of reagents and the environment. The use of salting-out requires additional specific pre-treatment processes and Subsequent desalination process

Method used

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  • Method for recycling pectin in orange can acid treatment water
  • Method for recycling pectin in orange can acid treatment water
  • Method for recycling pectin in orange can acid treatment water

Examples

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Embodiment 1

[0029] In this embodiment, concentrated solutions with different pH are used for heating and flocculation to optimize the yield of pectin. The specific steps are as follows:

[0030] Take the acid-treated water from the canned citrus processing and decapsulation process, and first coarsely filter it with a 100-mesh filter cloth to remove large particles such as capsule fragments and orange cores. The filtrate uses NaOH solution to adjust the pH to 5-7 (the concentration of NaOH solution is not quantitative, and using a larger concentration can improve the efficiency of pH adjustment, and a large concentration of NaOH requires a large stirring rate). Then use a vacuum concentrator to concentrate under reduced pressure at 50°C, and detect the total solid content online, stop the concentration when the total solid mass fraction is 1.3-1.4%, pump the qualified concentrated solution into the acid-resistant heater, use The mixed acid solution of citric acid and hydrochloric acid is ...

Embodiment 2

[0034] In this embodiment, mixed acids with different citric acid contents are used as acidity regulators to optimize the yield of pectin. The steps are as follows:

[0035]Take the acid-treated water from the canned citrus processing and decapsulation process, and first coarsely filter it with a 100-mesh filter cloth to remove large particles such as capsule fragments and orange cores. The filtrate uses NaOH solution to adjust the pH to 5-7 (the concentration of NaOH solution is not quantitative, and using a larger concentration can improve the efficiency of pH adjustment, and a large concentration of NaOH requires a large stirring rate). Then use a vacuum concentrator to concentrate under reduced pressure at 50°C, and detect the total solid content online, stop concentrating when the total solid mass fraction is 1.2-1.3%, pump the qualified concentrated solution into the acid-resistant heater, use The mixed acid solution of citric acid and hydrochloric acid is adjusted to pH...

Embodiment 3

[0040] In this embodiment, different flocculation heating temperatures are used to flocculate the acidic concentrated solution to optimize the yield of pectin. The specific steps are as follows:

[0041] Take the acid-treated water from the canned citrus processing and decapsulation process, and first coarsely filter it with a 100-mesh filter cloth to remove large particles such as capsule fragments and orange cores. The filtrate uses NaOH solution to adjust the pH to 5-7 (the concentration of NaOH solution is not quantitative, and using a larger concentration can improve the efficiency of pH adjustment, and a large concentration of NaOH requires a large stirring rate). Then use a vacuum concentrator to concentrate under reduced pressure at 50°C, and detect the total solid content online, stop the concentration when the total solid mass fraction is 1.3-1.4%, pump the qualified concentrated solution into the acid-resistant heater, use The mixed acid solution of citric acid and ...

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Abstract

The invention discloses a method for recycling pectin in orange can acid treatment water .The method comprises the steps that the orange can acid treatment water is filtered, and then the pH is regulated to be neutral; then, the orange can acid treatment water is subjected to vacuum concentration until the mass fraction of total solids ranges from 1.1% to 1.6%, the pH is regulated to be 0.5-3 with a mixed solution of citric acid monohydrate and hydrochloric acid, uniform heating is carried out at 85-98 DEG C, and flocculent precipitate is generated; the precipitate is filtered and then washed 1-2 times with a high-concentration ethanol aqueous solution, drying and grinding are carried out, and pectin polysaccharide is obtained .According to the method, conventional simple equipment is used, manual operation is simple, the technological cost is low, industrial production can be easily achieved, the method can be effectively used for treating and recycling the orange can acid processing water and is environmentally friendly, and the additional value of orange processing is increased .

Description

technical field [0001] The invention belongs to the field of emission reduction and comprehensive utilization of canned fruit and vegetable production wastewater, and in particular relates to a method for extracting pectin substances in acid-treated water of canned citrus. technical background [0002] China is rich in citrus fruits, and its planting area and output occupy an important position in the world. According to "China Agricultural Statistics", from 2011 to 2013, China's citrus planting area and output continued to grow. In 2013, the citrus output was 33.2094 million tons. The planting area is 2422.2 thousand hectares. Among them, the wide-skinned citrus is a unique citrus variety native to China. It is one of the most important types of citrus fruit trees in my country. It is named for its easy peeling of the skin and flesh. It has high edible and economic value and is popular among consumers around the world. favorite. [0003] Processing citrus oranges into cann...

Claims

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Application Information

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IPC IPC(8): C08B37/06
CPCC08B37/0003C08B37/0045
Inventor 陈健乐叶兴乾程焕陈士国刘东红胡亚芹吴丹丁甜高海峰洪基光
Owner ZHEJIANG UNIV
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