Application of Ultrasound in Food Drying

Yıl 2015, Cilt: 21 Sayı: 9, 408 - 413, 04.01.2016

Senem Tüfekçi , Sami Gökhan Özkal

Öz

Drying has a privileged position in all food preservation methods by reducing of existing water content in food not allowing spoilage, providing a precise and cheap preservation opportunity. Sound waves with frequencies above human hearing are called as ultrasound. Ultrasound which is applied prior to drying as pretreatment or simultaneously is effective on drying performance of products. It is known that diffusion of water increased and total process time shortened in processes that ultrasonic energy is combined with different drying methods and products treated with ultrasound are rehydrated easier. Also ultrasound found to be an alternative method for producing low-sugar dried products. In this study, the basic effect mechanisms of ultrasonic energy and its application fields, effect on drying kinetics and products quality in processes which ultrasound combined with different drying methods such as osmotic drying, hot air drying and freeze drying are examined in the light of studies in literature.

Anahtar Kelimeler

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Gıdaların Kurutulmasında Ultrases Kullanımı

Öz

Gıda muhafaza yöntemleri arasında gıdadaki mevcut su oranını bozulmaya imkân vermeyecek şekilde azaltması, kesin ve ucuz bir muhafaza olanağı sunması açısından kurutmanın yeri ayrıcalıklıdır. İnsan kulağının işitebileceğinin üzerinde frekansa sahip ses dalgaları ultrases olarak adlandırılır. Kurutma öncesi önişlem olarak veya kurutma ile eş zamanlı bir şekilde uygulanan ultrases, ürünün kuruma performansı üzerine etkili olmaktadır. Ultrases enerjisinin farklı kurutma teknikleriyle kombine olduğu proseslerde suyun difüzyonunun arttığı ve işlem süresinin kısaldığı, ultrases ile muamele edilmiş kurutulmuş ürünlerin kolay rehidre olduğu bilinmektedir. Ayrıca ultrasesin şeker oranı düşük kurutulmuş ürün üretiminde kullanılabilecek alternatif bir yöntem olduğu görülmüştür. Bu çalışmada, ultrases enerjisinin temel etki mekanizmaları, uygulama alanları, ozmotik, sıcak hava ve dondurarak kurutma gibi farklı kurutma metotlarıyla kombine olduğu proseslerde kurutma kinetiği ile ürün kalite özellikleri üzerine etkileri literatürde yapılmış çalışmalar ışığında incelenmiştir.

Anahtar Kelimeler

Ultrases, Kurutma, Ön işlem

Kaynakça

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