The production process of lily-based products involves a series of carefully controlled steps to ensure quality, safety, and consistency. The process begins with selection, where fresh lilies are carefully chosen and stripped of any impurities such as stems, rotten parts, or foreign materials. After stripping, the lilies are thoroughly washed in a cleaning pool to remove dirt and sediment. Once cleaned, they are drained, weighed, and then crushed using a pulper to break down the plant material into a fine slurry.
Due to the high susceptibility of lily pulp to oxidation and browning during processing, an effective pretreatment is essential. To prevent discoloration, 0.2% vitamin C (Vc) and 0.1% citric acid are added to the slurry during this stage. Following pretreatment, the slurry undergoes refining, where it is re-milled to improve the texture and maximize the extraction of lily sap, increasing overall yield. At this point, water is typically added in a ratio of 1:2, and the soluble content in the resulting liquid is usually around 1%.
Next, the refined slurry is passed through a coarse filtration process using a 60-mesh nylon filter cloth. The filtrate is then allowed to settle in a sedimentation tank for approximately 12 hours, enabling the liquid to clarify naturally. After settling, the clear supernatant is collected and mixed with ingredients—specifically 6% sugar and 0.1% carboxymethyl cellulose (CMC)—to enhance flavor, texture, and stability.
Once the mixture is prepared, it goes through a fine filtration step using an 180-mesh filter to remove any remaining particulates. The filtered liquid is then subjected to high-pressure homogenization at around 18 mPa to ensure a smooth and uniform product. Simultaneously, a degassing process is performed under vacuum conditions of at least 600 mmHg to eliminate air bubbles and improve product stability.
After homogenization and degassing, the liquid is transferred to a filling machine for packaging. The filling and sealing process is carried out in a vacuum-sealed tank, ensuring that the vacuum level reaches at least 380 mmHg for proper sealing. Once filled, the cans are sterilized using a horizontal autoclave, operating at a steam pressure of 0.15 mPa and a temperature of 121°C for 10 minutes. After sterilization, the cans are cooled with cold water to about 70°C.
Following sterilization, the cans are inspected for leaks, bulging, or other defects. Any issues are identified and addressed before proceeding to labeling and storage. The cans are then labeled with the production date, batch number, and other necessary information. Finally, the finished products are stored in an insulated warehouse for five days to ensure stability and quality before being distributed. This comprehensive process ensures that the final product meets all safety, quality, and sensory standards.
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