Strawberry deep processing has become a hot track for fruit processing enterprises in recent years. Freeze-dried strawberry chips, whole freeze-dried strawberries and strawberry powder are exported in large quantities to Europe, Southeast Asia and North America, with stable market demand and high profit margins. However, ordinary universal freeze dryers cannot target strawberry's material characteristics, leading to many production troubles for manufacturers.
Fresh strawberries have thin peel and soft pulp. If the pre-freezing temperature is not properly controlled, pulp cell rupture will occur, resulting in serious shrinkage and darkening after drying. In addition, strawberry contains a large amount of fruit acid and sugar, improper heating will cause browning, lose bright appearance, and greatly reduce product market competitiveness.
Our R&D team developed exclusive freeze-drying process curves for strawberries after hundreds of material tests. The equipment is equipped with graded slow pre-freezing function, which freezes strawberries from shallow to deep, fully lock cell structure and avoid shrinkage and deformation. The low-temperature uniform sublimation mode avoids local overheating, effectively inhibits fruit acid oxidation, and finished strawberries maintain bright red color without browning.
The complete strawberry production line realizes full automatic pretreatment. The fruit sorting machine removes rotten, deformed and undersized strawberries; bubble cleaning machine removes surface soil and pesticide residues without scratching pulp; circulating hot water blanching equipment passivates oxidase to prevent discoloration during storage; automatic draining and spreading machine evenly arranges strawberries on stainless steel trays, uniform thickness ensures consistent drying effect.
The core freeze dryer is equipped with PLC intelligent control system, which stores multiple sets of strawberry process parameters (whole strawberry, sliced strawberry, strawberry puree). Operators can switch formulas with one click to produce different specifications of freeze-dried strawberry products. All material contact parts are 304 food-grade stainless steel, seamless welding without sanitary dead corners, easy to clean and disinfect, meeting international food hygiene requirements.
Supporting vacuum nitrogen filling packaging machine solves the problem that freeze-dried strawberries are easy to absorb moisture and soften. Isolating oxygen can prolong shelf life by more than 12 months, suitable for long-distance sea transportation for cross-border export. All equipment supports FOB Qingdao delivery, complete CE certification documents provided for customs clearance.
Many fruit processing clients have purchased our strawberry freeze drying lines. After putting into production, the reject rate of freeze-dried strawberries dropped below 3%, the fruit shape integrity rate exceeded 96%, and products successfully entered overseas supermarket chains, bringing stable long-term orders for manufacturers.
