ارزیابی قابلیت ماشین بویایی در تفکیک کیفیت خرمای خشک شده با روش‌های الکتروهیدرودینامیک، هوای گرم و ترکیبی

نوع مقاله: مقاله پژوهشی

نویسندگان

1 دانش آموخته دکتری، گروه مهندسی ماشینهای کشاورزی، دانشکده مهندسی و فناوری کشاورزی، پردیس کشاورزی و منابع طبیعی، دانشگاه تهران، کرج، ایران

2 استاد، دانشکده مهندسی و فناوری کشاورزی، ، پردیس کشاورزی و منابع طبیعی، دانشگاه تهران، کرج، ایران

3 دانشیار، گروه مهندسی ماشینهای کشاورزی، دانشکده مهندسی و فناوری کشاورزی، پردیس کشاورزی و منابع طبیعی، دانشگاه تهران، کرج، ایران

4 دانشیار، گروه مهندسی مکانیک بیوسیستم، دانشکده کشاورزی، دانشگاه شهرکرد، شهرکرد، ایران

5 استاد، گروه مهندسی ماشینهای کشاورزی، دانشکده مهندسی و فناوری کشاورزی، پردیس کشاورزی و منابع طبیعی، دانشگاه تهران، کرج، ایران

6 دانشجوی دکتری، دانشکده مهندسی و فناوری کشاورزی، ، پردیس کشاورزی و منابع طبیعی، دانشگاه تهران ، کرج، ایران

چکیده

استفاده از روش­ها و دماهای مختلف در فرآیند خشک کردن، کیفیت محصول را دستخوش تغییرات کرده و عطر و بوی آن را نیز تحت تأثیر قرار می­دهد. روش خشک کردن به شیوه الکتروهیدرودینامیک یک روش غیر‌حرارتی است که با امکان افزایش نرخ تبخیر در دما و فشار محیط، باعث حفظ بهتر کیفیت محصول خشک شده می شود. هدف این پژوهش امکان‌سنجی طبقه‌بندی و ارزیابی کیفیت خرمای خشک شده در سه سطح مختلف از سرعت هوا به روش‌های الکتروهیدرودینامیک (در دماهای 25، 35 و 60 درجه سلسیوس) و روش‌ هوای گرم (در دمای °C60) بر اساس بو و رایحه محصول خشک شده به وسیله یک سامانه چند حسگری ماشین بویایی است. نتایج نشان داد که کیفیت خرمای خشک شده بر اساس رایحه به سه گروه مختلف (گروه یک: الکتروهیدرودینامیک در دمای °C25، گروه دو: الکتروهیدرودینامیک در دمای °C35 و گروه سوم: هوای گرم و ترکیبی در دمای °C60) طبقه بندی می‌شود. پاسخ حسگرهای نیمه هادی اکسید فلزی در روش الکتروهیدرودینامیک در دمای 25 درجه سلسیوس بالاتر از بقیه بود که حاکی از حفظ بهتر رایحه محصول در این روش است. در پایان موثرترین حسگرها در تفکیک بوی خرما مشخص شدند.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Evaluation of a Machine Olfaction to Classify the Quality of Dried Date Fruit by Electrohydrodynamic, Hot Air, and the Hybrid Drying Techniques

نویسندگان [English]

  • Mahdi Keramat-Jahromi 1
  • Seyed Saeid Mohtasebi 2
  • Hossein Mousazadeh 3
  • Mahdi Ghasemi-Varnamkhasti 4
  • shahin rafiee 5
  • Ehsan Savand-Roumi 6
1 Ph.D. Graduated, Department of Agricultural Machinery Engineering, Faculty of Agricultural Engineering and Technology, University College of Agriculture and Natural Resources, University of Tehran, Karaj, Iran
2 Professor, Department of Agricultural Machinery Engineering, Faculty of Agricultural Engineering and Technology, University College of Agriculture and Natural Resources, University of Tehran, Karaj, Iran
3 Associate Professor, Department of Agricultural Machinery Engineering, Faculty of Agricultural Engineering and Technology, University College of Agriculture and Natural Resources, University of Tehran, Karaj, Iran
4 Associate Professor, Mechanical Engineering of Biosystem Department, Faculty of Agriculture, University of Shahrekord, Shahrekord, Iran
5 Professor, Faculty of Agricultural Engineering and Technology, University of Tehran, Karaj, Iran
6 Ph.D. Student, Department of Agricultural Machinery Engineering, Faculty of Agricultural Engineering and Technology, University College of Agriculture and Natural Resources, University of Tehran, Karaj, Iran
چکیده [English]

The dried products quality is influenced by the drying methods and different temperatures, especially on their smell and aroma. The electrohydrodynamic (EHD) method as a non-thermal drying method has an increasing effect on the rate of evaporation of product moisture content in ambient temperature and pressure, and preserve quality in dried food products. The objective of this study was to classify the quality of dried dates at three different air velocity by different drying conditions of electrohydrodynamic (EHD in 25 and 35 °C), hot air (HA at 60 °C) and hybrid drying (EHD-HA at 60 °C) techniques based on odor using a multi-sensory olfactory machine. The results showed that dried date fruit quality base on its odor was classified to three classes (1: EHD at 25°C, 2: EHD at 35°C and 3: HA and EHD-HA at 60 °C). The response of metal oxide semiconductor sensors in EHD method at 25 °C was higher than the others which show the aroma of dried date fruit in class 1 is conserved more better than the other classes. Finally, the effective sensors were determined to recognize the odor of date fruit.

کلیدواژه‌ها [English]

  • Date fruit
  • Olfactory machine
  • Drying
  • Electrohydrodynamic
  • Hot air

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