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Method for extracting pigment and polyphenol from water chestnut peels

An extraction method, the technology of water chestnut skin, which is applied in the field of food processing, can solve the problems of insufficient development and utilization of resources, and achieve the effects of easy decomposition and utilization, mild enzymatic hydrolysis conditions, and saving extraction solvents

Active Publication Date: 2014-02-19
NANCHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the peels produced by water chestnut processing are generally thrown away directly or used as animal feed, and this resource has not been fully developed and utilized.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) Grinding: Grinding 1000 kg of dried water chestnut skin with a grinder, and passing through a 20-mesh sieve.

[0024] (2) Humidity adjustment: Add 70 kg of water to the water chestnut skin powder, and adjust the moisture content of the material to 15%.

[0025] (3) Extrusion: The material after humidity adjustment is processed by a twin-screw extruder, and the extrusion temperature is 120°C.

[0026] (4) Humidity adjustment: Add 550 kg of cold boiled water to the extruded material until the water content of the material is 40%.

[0027] (5) Fermentation: Trichoderma longibrachiata ( Trichoderma longibrachiatum , CGMCC 3.03017), Rhizopus oryzae ( Rhizopus oryzae , CGMCC 3.00867) and Saccharomyces cerevisiae ( Saccharomyces cerevisiae , CGMCC 2.129) were inserted into the material, the inoculation amount was 0.1% of the weight of the material, and fermented at 28°C for 6 days.

[0028] (6) Extraction: Add 550 kg of ethanol to the material, stir evenly at room te...

Embodiment 2

[0031] (1) Grinding: Grinding 100 kg of dried water chestnut skin with a grinder, and passing through a 20-mesh sieve.

[0032] (2) Humidity adjustment: Add 7.5 kg of water to the water chestnut skin powder, and adjust the moisture content of the material to 15%.

[0033] (3) Extrusion: The material after humidity adjustment is processed by a twin-screw extruder, and the extrusion temperature is 120°C.

[0034] (4) Humidity adjustment: Add 60 kg of cold boiled water to the extruded material until the water content of the material is 42%.

[0035] (5) Fermentation: Trichoderma longibrachiata ( Trichoderma longibrachiatum , CGMCC 3.03017), Rhizopus oryzae ( Rhizopus oryzae , CGMCC 3.00867) and Saccharomyces cerevisiae ( Saccharomyces cerevisiae , CGMCC 2.129) were inserted into the material, the inoculum amount was 0.1% of the weight of the material, and fermented at room temperature (20-28°C) for 8 days.

[0036] (6) Extraction: Add 60 kg of ethanol to the material, stir ...

Embodiment 3

[0039] (1) Grinding: Grinding 100 kg of dried water chestnut skin with a grinder, and passing through a 20-mesh sieve.

[0040] (2) Humidity adjustment: Add 7.5 kg of water to the water chestnut skin powder, and adjust the moisture content of the material to 15%.

[0041] (3) Extrusion: The material after humidity adjustment is processed by a twin-screw extruder, and the extrusion temperature is 120°C.

[0042] (4) Humidity adjustment: Add 60 kg of cold boiled water to the extruded material until the water content of the material is 42%.

[0043] (5) Fermentation: Trichoderma longibrachiata ( Trichoderma longibrachiatum , CGMCC 3.03017) and Rhizopus oryzae ( Rhizopus oryzae , CGMCC 3.00867) were inserted into the material, the inoculum amount was 0.1% of the material weight, fermented at 28°C for 3 days, and the material was turned once a day. On the 4th day, Saccharomyces cerevisiae ( Saccharomyces cerevisiae , CGMCC 2.129), and continued fermentation at 28°C for 3 days...

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Abstract

A method for extracting pigment and polyphenol from water chestnut peels comprises the following steps: crushing dried water chestnut peels by a pulverizer, sieving by a sieve with 20 meshes; adding proper amount of water into the water chestnut peel powder to adjust water content of the powder to 15%; processing the wetted powder by a twin-screw extruder with an extrusion temperature of 120 DEG C; adding proper amount of cold boiled water into the extruded material to make the water content of the material be 30-50%; inoculating a mixed animalcule bacteria accounting for 0.1% by weight of the material, fermenting at 20-40 DEG C for 2-10 days; adding alcohol accounting for one third by weight of the material, fully stirring at room temperature, filtering out alcohol extract under pressure, repeating for 3 times, and merging three time alcohol extracts; distilling the alcohol filtrate under pressure to recover alcohol and obtain water chestnut peel pigment and polyphenol.

Description

technical field [0001] The invention belongs to the technical field of food processing. Background technique [0002] During the deep processing of water chestnuts, the peel needs to be removed, and its weight reaches about 20% of that of fresh water chestnuts. With the development of water chestnut deep processing industry, the number of water chestnut peels will further increase. At present, the peels produced by water chestnut processing are generally thrown away directly or used as animal feed, and this resource has not been fully developed and utilized. Water chestnut skin is rich in natural pigments and polyphenols, as well as starch and sugar. The polyphenols in water chestnut skin have the functions of anti-oxidation, prevention and treatment of hyperlipidemia, and improvement of immunity. Therefore, a large amount of discarded water chestnut skins are a kind of precious resources urgently to be developed and utilized. The main component of water chestnut skin is...

Claims

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Application Information

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IPC IPC(8): C09B61/00A61K36/89
Inventor 刘晓华李海星
Owner NANCHANG UNIV
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