Bio-preservation processing method of daylilies

Abstract

The invention discloses a bio-preservation processing method of daylilies, belonging to the technical field of food processing. The bio-preservation processing method of daylilies comprises the steps of S1, material selection: selecting fresh daylilies and unfolding on a food steamer; S2, enzyme deactivation and sterilization: arranging the food steamer in steam to steam for 2-3min and then cooling; S3, bacterium solution addition: adding the cooled daylilies into bacterium solution under a sealed anaerobic alkaline environment; S4, storage: putting the daylilies which are added into the bacterium solution into a pool for sealed storage; S5, cleaning: after the storage, taking out the daylilies for washing and then removing the water on the surface; S6, bagging: arranging the water removed daylilies, soaking in a food color fixative solution, draining the moisture and carrying out vacuum packaging; S7, sterilization: carrying out high-temperature vacuum sterilization on the packaged daylilies and then cooling. The bio-preservation processing method of daylilies is capable of postponing the undesirable change of the daylilies and has the characteristics that operation is simple, cost is low, and environment is friendly; the processed daylilies is long in storage period, less in nutritional ingredient loss and good in color and crispness.

Description

technical field [0001] The invention belongs to the technical field of food processing, and in particular relates to a biological fresh-keeping processing method of day lily. Background technique [0002] Day lily (Hemerocallis Fulvs), also known as day lily, is a perennial herb of Liliaceae, and its edible part is a flower bud. It is a characteristic vegetable in my country. Day lily is rich in nutrition, high in vitamins, protein, sugar and minerals, and has special health care and medicinal functions, so it is a precious vegetable. Since day lily is difficult to keep fresh, it has been dehydrated and dried before being stored and sold. In recent years, the method of directly cooking with fresh day lily has been favored by consumers, and the market demand for fresh day lily has increased greatly. The harvest period of day lily is mainly from mid-to-late May to mid-to-early October. After harvesting, it will start to brown and decay the next day at a temperature of 25-30°...

AI Technical Summary

Problems solved by technology

[0003] Traditional day lily processing methods often use steamer steaming or use transparent plastic film bags to put them in the sun for drying and steaming, but these processing methods have the following disadvantages: 1. The color of day lily fades after drying, which is often caused by improper temperature control. Black flowers or blue flowers; 2. Due to the color difference affecting the grade and unit price, farmers are forced to dye with sulfur, which brings harmful substances to the day lily; 3. Once it encounters rainy days during the rich production period, the day lily that comes out of the cage will be mildewed without sunlight go bad

4. The storage and freshness period is generally about 20 days, which is far from meeting the long-term market demand for fresh day lily

[0004] Aiming at the deficiencies of traditional methods, Chinese patent CN1141723 discloses a dehydration and fresh-keeping processing method of day lily. The method is to use the food additive sodium metabisulfite to soak or stack retting, and then dry and dehydrate. Although this method can ensure the color and taste of day lily It is fresh and does not lose nutrients, but it is easy to cause the residual content of sodium metabisulfite to exceed the standard, which is harmful to human health

[0005] Chinese patent CN1875726 discloses a fresh-keeping method for day lily by refrigerating, pre-cooling, ozone treatment, bagging, adding preservatives, and storing at 2-4°C for a storage period of up to 2 months, but the method is tedious and expensive. Also large, not suitable for farmers to use;

[0006] Chinese patent CN101919440 discloses a natural antistaling agent for day lily and its preparation method and application method. As a result, although this invention solves the technical problem that the picked day lily cannot be exposed to the sun and deteriorates in rainy days, but the formula contains many ingredients, and the preparation method of this preservative is also cumbersome. Therefore, the capital investment is increased, which is not conducive to production.

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