Seafood drying equipment is a specialized system that removes moisture (to 10%-25%) from seafood (fish, shrimp, scallops, seaweed) via controlled thermal or vacuum processes, inhibiting microbial growth and enzymatic activity while preserving nutritional value (protein, omega-3 fatty acids) and sensory properties. It addresses the limitations of traditional sun drying (weather-dependent, contamination risks) with four core technologies, each tailored to seafood type. Hot air dryers are the most common: they circulate dehumidified air at 40℃-80℃ (40℃-50℃ for delicate seaweed, 60℃-80℃ for robust fish) with adjustable air velocity (1-3 m/s) to ensure uniform drying. They include tray or belt designs, with exhaust systems to remove moist air, preventing case hardening (surface drying that traps moisture). Vacuum dryers operate at 30℃-50℃ under 10-50 kPa vacuum, lowering water’s boiling point to preserve tender textures (ideal for scallops, squid). They reduce drying time by 30%-50% vs. hot air systems and retain 90% of flavor compounds (e.g., shrimp’s umami). Freeze dryers (lyophilizers) are premium options: seafood is pre-frozen to -40℃ to -60℃, then ice is sublimated under 10-30 Pa vacuum. This preserves 95% of nutrients, original shape, and rehydration capacity (regains 90% volume when soaked), making it suitable for high-value products (freeze-dried shrimp snacks, emergency rations). Solar dryers use solar collectors to heat air (35℃-55℃), a cost-effective, eco-friendly choice for small-scale processors in sunny regions (e.g., Southeast Asia), though they require backup heating for cloudy days. All models use 304/316L stainless steel contact parts (resistant to salt) and feature detachable trays/filters for sanitization (compliant with HACCP). Moisture sensors and PLC controls prevent over-drying (brittleness) or under-drying (spoilage). For processors, this equipment reduces waste (converts excess fresh seafood into shelf-stable products), extends shelf life (6-18 months), and caters to global demand: dried fish is a staple in African/Asian markets, while freeze-dried seafood appeals to health-conscious consumers in North America/Europe seeking protein-rich snacks without additives.
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