Barbary wolfberry fruit hot-air drying method using cold ion pretreatment

A hot air drying and pretreatment technology, applied in food drying, application, food preservation, etc., can solve the problems of physical and chemical quality degradation such as color degradation of agricultural products, high cost of vacuum freeze-drying, unfavorable large-scale production, etc., to achieve color and other physical and chemical The effect of good quality, shortened drying time, and increased processing cost

Pending Publication Date: 2019-08-30
CHINA AGRI UNIV
View PDF2 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, the pretreatment technology that has been used includes gas jet impingement blanching pretreatment technology, which can increase the drying rate of wolfberry, but the blanching temperature is too high, and heat treatment may lead to the degradation of physical and chemical quality of agricultural products such as color degradation, so the development of non-toxic Heat pretreatment is very necessary
Freeze pretreatment technology is applied in vacuum freeze-drying. The dried wolfberry fruit obtained by this technology has good color and high retention of biologically active substances, but the whole process takes too long, usually more than 24 hours, and consumes a lot of energy. Vacuum freeze-drying High cost, not conducive to mass production

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Barbary wolfberry fruit hot-air drying method using cold ion pretreatment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Select fresh goji berries with no mold, no obvious damage, and the same size, wash with tap water, drain, and remove surface moisture with absorbent paper. Air is used as the source of cold plasma emission, and the parameters of the cold ion device are set as follows: the distance between the nozzle of the device and the wolfberry sample is 6cm, the flow rate of the cold plasma is 3L / min, the pulse frequency is 20kHz, and the power is 750w. Lycium barbarum samples were treated with cold ions for 15 seconds, and spread in a single layer in a drying tray. The mass of wolfberry in each tray was 149-152 g, and then directly dried with constant temperature and humid hot air. The temperature of the drying room was 65°C. Adjust the humidity to 40% for hot air drying. After 30 minutes, adjust the humidity in the drying room to 20% for hot air drying at a wind speed of 3m / s. When the moisture content reaches 13%, as the drying end point, it takes 12 hours.

Embodiment 2

[0041] Select fresh goji berries with no mold, no obvious damage, and the same size, wash with tap water, drain, and remove surface moisture with absorbent paper. Air is used as the source of cold plasma emission, and the parameters of the cold ion device are set as follows: the distance between the nozzle of the device and the wolfberry sample is 6cm, the flow rate of the cold plasma is 3L / min, the pulse frequency is 20kHz, and the power is 750w. Lycium barbarum samples were treated with cold ion for 30 seconds, and spread in a single layer in a drying tray. The mass of wolfberry in each tray was 149-152 g, and then directly dried with constant temperature and humid hot air. The temperature of the drying room was 65°C. Adjust the humidity to 40% for hot air drying. After 30 minutes, adjust the humidity in the drying room to 20% for hot air drying at a wind speed of 3m / s. When the moisture content reaches 13%, it is used as the end point of drying, and it takes 7 hours.

Embodiment 3

[0043]Select fresh goji berries with no mold, no obvious damage, and the same size, wash with tap water, drain, and remove surface moisture with absorbent paper. Air is used as the source of cold plasma emission, and the parameters of the cold ion device are set as follows: the distance between the nozzle of the device and the wolfberry sample is 6cm, the flow rate of the cold plasma is 3L / min, the pulse frequency is 20kHz, and the power is 750w. Lycium barbarum samples were treated with cold ions for 45 seconds, and spread in a single layer on drying trays. The mass of wolfberries in each tray was 149-152 g, and then directly dried with constant temperature and humid hot air. The temperature of the drying room was 65°C. Adjust the humidity to 40% for hot air drying. After 30 minutes, adjust the humidity in the drying room to 20% for hot air drying at a wind speed of 3m / s. When the moisture content reaches 13%, it is used as the end point of drying, and it takes 7 hours.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a barbary wolfberry fruit hot-air drying method using cold ion pretreatment. The hot-air drying method comprises the steps as follows: 1) performing cold ion pretreatment on barbary wolfberry fruits; and 2) performing hot-air drying on the barbary wolfberry fruits treated by the step 1) to realize drying treatment of the barbary wolfberry fruits, wherein cold ion treatmentis performed for 15 s-60 s, the conditions of cold ion pretreatment are as follows: air serves as a cold ion generation source, the distance between a nozzle of a cold ion device and a barbary wolfberry fruit sample is 4-8 cm, the cold ion body flow is 2-4 L / min, the pulsation frequency is 15-30 kHz, and power is 600-900 w. The invention provides the cold ion pretreatment for drying the barbary wolfberry fruits, surfaces of the barbary wolfberry fruits after cold ion treatment can be etched and have micropores, barrier of wax coats on the surfaces of the barbary wolfberry fruits is broken through, and compared with non-pretreated barbary wolfberry fruit samples, the barbary wolfberry fruit sample greatly shortens the drying time and reduces energy consumption. Besides, the rehydration ratio, color and other physical and chemical qualities of the barabry wolfberry fruits are better kept.

Description

technical field [0001] The invention relates to a method for hot-air drying wolfberry by using cold ion pretreatment, and belongs to the technical field of agricultural product processing. Background technique [0002] Lycium barbarum is a kind of herb of Solanaceae, which is widely distributed in the world. At present, my country is the main producer and exporter of wolfberry. It has high economic value. As a functional food and traditional Chinese herbal medicine, it has been widely used for more than 2500 years. Goji berries have high nutritional value and contain many health-promoting bioactive substances, including flavonoids, polyphenols, vitamins, and goji berry polysaccharides. [0003] The moisture content of fresh wolfberry fruit is relatively high, which is susceptible to microbial infection and has a short storage period. At present, the main form of wolfberry sold in the market is dried fruit of wolfberry. Drying is a key unit operation in the production of wol...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): A23B7/148A23B7/02
CPCA23B7/148A23B7/0205A23V2002/00A23V2300/10A23V2250/101
Inventor 肖红伟周钰浩郑志安仲崇山
Owner CHINA AGRI UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap