Lepidium meyenii walp temperature-varied drying method

A technology of variable temperature drying and maca, which is applied in the direction of drying solid materials, heating to dry solid materials, drying, etc., can solve the problems of large differences in appearance and internal quality, and avoid manpower consumption, reduce degradation, and reduce wrinkle degree Effect

Active Publication Date: 2015-12-09
KUNMING UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Thirdly, natural sun-dried maca is affected by air temperature and humidity in different places, and its appearance and internal quality vary greatly.

Method used

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  • Lepidium meyenii walp temperature-varied drying method
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  • Lepidium meyenii walp temperature-varied drying method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Wash the fresh yellow maca, place it at room temperature and drain it naturally until there is no moisture on the surface; then place the Chinese medicinal materials in a hot air drying oven to dry; the process parameters are as follows: stabilize the temperature for 40 hours at an initial temperature of 30°C Afterwards, uniformly heat up to 55°C at a heating rate of 5°C / 24h, then uniformly heat up to 70°C at a rate of 10°C / 12h, keep warm until dry, and the time to reach a moisture content of ≤13% is 130h. After drying, the surface of maca is smooth without wrinkles, the overall deformation is small, and its apparent color is bright (see figure 1 , 2 , 3).

Embodiment 2

[0025] Wash the fresh purple maca, place it at room temperature and drain it naturally until there is no moisture on the surface; then dry it in a Chinese herbal medicine dryer; the process parameters are, after the initial temperature is 25°C , according to the heating rate of 3 ℃ / 24h uniform heating to 55 ℃, and then 7.5 ℃ / 12h speed uniform heating to 65 ℃, heat preservation until dry, the time to reach moisture content ≤ 13% is 118h. Maca is bright in color after drying, the surface is smooth without wrinkles, and the overall deformation is small (see Figure 4 , 5 ).

Embodiment 3

[0027] Wash the fresh black maca, place it at room temperature and drain it naturally until there is no moisture on the surface; then dry it in a Chinese herbal medicine dryer; , according to the heating rate of 2.5 ℃ / 24h uniform heating to 55 ℃, and then 5 ℃ / 12h speed uniform heating to 68 ℃, heat preservation until dry, the time to reach the moisture content ≤ 13% is 123h. After drying, the appearance of maca is better, the surface is smooth and wrinkle-free, and the overall deformation is small (see Figure 6 , 7 ).

[0028] The nutrient content of yellow, purple and black maca under variable temperature drying process is shown in Table 1;

[0029] Table 1 The contents of various nutrients in maca of each color under variable temperature drying process (%)

[0030] .

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Abstract

The invention discloses a lepidium meyenii walp temperature-varied drying method and belongs to the technical field of preliminary processing of agricultural products. The method mainly comprises the following steps of cleaning and washing fresh lepidium meyenii walp, draining off water residues on the lepidium meyenii walp, and conducting temperature-varied drying on the lepidium meyenii walp at the room temperature. Compared with a traditional airing method, according to the method, hot-air drying equipment is used, the process that the temperature is raised gradually from the low temperature to the high temperature at a variable-speed mode is adopted, lepidium meyenii walp moisture is prevented from being lost rapidly, shape change is reduced, the color and lustre are maintained, under the condition that nutritional ingredients are not lost, the lepidium meyenii walp drying time is shortened by over 20 days, the drying efficiency is remarkably improved, and meanwhile defects that by means of a traditional solarization method, manpower is consumed, the occupied area is large, and pollution is prone to occurring are avoided.

Description

technical field [0001] The invention discloses a variable temperature drying method for maca, which belongs to the technical field of primary processing of agricultural products. Background technique [0002] Maca ( Lepidium meyenii ) belongs to the genus Brassicaceae ( Lepidium ), also known as beetroot or Peruvian ginseng, is a plant that is both medicinal and edible. It has the effects of enhancing physical strength, enhancing human immunity, anti-fatigue, and improving fertility. In 2011, maca powder was officially approved as a new resource food by the former Ministry of Health. More than 60% of China's maca planting bases are concentrated in Lijiang, and the annual planting area and output of maca in this area reach 175hm respectively 2 and 780t, accounting for 90% and 93% of the country's total. In 2014, the output value of Lijiang's maca was close to 4 billion, and it has become an important source of income for local farmers. [0003] At present, maca generall...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F26B3/00
Inventor 崔秀明杨野代春燕刘迪秋王承潇杨晓艳曲媛
Owner KUNMING UNIV OF SCI & TECH
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