Raw material selection: Select spinach leaves as raw materials, remove old leaves and roots.
Production process: Wash the spinach, put it into a drying sieve and dry it. The temperature is controlled at 80°C. The baking time is generally about 4 hours. After drying, the moisture content is required to be below 6.5%.
Frozen spinach
Raw material choice: use fresh, yellow leaves, no white spots, no convulsions, no pests, round leaf varieties of spinach.
Pretreatment: Because the spinach water evaporates quickly and perishes, it must be treated in time after harvesting, cut off the roots, repair the roots, and pick out the strains.
Blanching: Wash the spinach with clean water, bundle it into small pieces, and drain it into bamboo baskets. Then blanch. Heat the roots for 1 minute and then heat the leaves for 1 minute. Be careful not to over-steam.
Cooling: Boiled spinach should be immediately dropped into cold water and cooled to a temperature of 10°C. The cooling rate has a great influence on spinach.
Freezing: The cold-dried spinach drains water, neatly spreads in a grid of 18 cm in length and 13 cm in width and is frozen in a freezer at about minus 35°C until the central temperature is below 18°C.
Ice packs: Frozen iced spinach. Remove the frozen spinach, put it in 3-5°C cold water for 3-5 seconds and remove immediately. The lyophilized spinach is wrapped in a polyethylene bag and frozen at minus 18°C.
Multi Span Plastic Film Greenhouse
Arch greenhouse is a kind of economical greenhouse, which is welcomed by the users with graceful curve form and low cost. It has beautiful appearance, fluent visual, reasonable structure and good performance for keep temperature. It is economical greenhouse because of its relatively low manufacturing cost. It can be applied in most areas of China. Double membrane greenhouse is used more in north of China, while single film greenhouse is used more in southern region. It can get maximum sunlight when visible light is within the scope of 0.4 to 0.7 microns and form a thick envelope, which can effectively prevent heat loss and prevent the invasion of cold air. Adopting a double membrane can greatly improve heat preservation performance of the greenhouse and save operating cost. The top cover material is polyethylene lifelong anti-fog and anti-dipping film po-covering. The outer of it has the function of UV protection and the inner has the function of preventing from the sets of dew. According to the needs of customers, the sides of the greenhouse can be covered with polyethylene lifelong anti-fog and anti-dripping po-covering or polycarbonate hollow plate.
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JIANGSU SKYPLAN GREENHOUSE TECHNOLOGY CO.,LTD , https://www.greenhousehydroponic.com