نوع مقاله : مقاله پژوهشی لاتین

نویسندگان

1 دانشگاه پیام نور

2 گروه علوم و مهندسی صنایع غذایی، دانشکده علوم دامی و صنایع غذایی، دانشگاه علوم کشاورزی و منابع طبیعی خوزستان، ملاثانی، ایران

چکیده

در این پژوهش روش سطح پاسخ برای بهینه‌یابی شرایط خشک کردن پسماند میوه به توسط امواج مایکروویو مورد استفاده قرار گرفت. اثر توان مایکروویو (300-100 وات) و زمان خشک کردن (15-5 دقیقه) به‌عنوان متغییرهای مستقل بر میزان رطوبت، تغییرات رنگ و پذیرش کلی پودر پسماند میوه به، به‌عنوان متغییر وابسته (پاسخ) مورد ارزیابی قرار گرفت. مدل‌های رگرسیونی به‌دست آمده برای تمام پاسخ‌ها در سطح 95% اطمینان معنی‌دار بود. شرایط بهینه به‌دست آمده برای کمینه میزان رطوبت و تغییرات رنگ و بیشینه پذیرش کلی عبارت بود از: توان 200 وات و زمان 8 دقیقه. ضریب نفوذ مؤثر پودر پسماند به در خشک‌کن مایکروویو بین (m/s) 9-10 × 87/4 – 83/1 به‌دست آمد. مقدار انرژی فعال‌سازی با استفاده از معادله آرنیوس برمبنای رابطه بین توان مایکروویو و ضریب نفوذ مؤثر محاسبه شد که 41/16 بود.

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