نوع مقاله : مقاله پژوهشی

نویسندگان

1 گروه علوم و مهندسی صنایع غذایی، دانشگاه فردوسی مشهد

2 استاد گروه علوم و صنایع غذایی دانشکده کشاورزی دانشگاه فردوسی مشهد

3 عضوهیات علمی گروه علوم و مهندسی صنایع غذایی دانشگاه فردوسی مشهد،

چکیده

در این پژوهش، صمغ دانه مرو بر اساس روش خشک (مبتنی بر اصطکاک) استخراج شد و شرایط استخراج با استفاده از روش سطح پاسخ و در قالب طرح باکس بهنکن بهینه‌یابی گردید. روش استخراج خشک با هدف دستیابی به روشی اقتصادی، سریع، دوست‌دار محیط زیست (تکنولوژی سبز)، پیوسته، با کاربری آسان و خودکار به کار گرفته شد. متغیرهای مستقل این پژوهش شامل: سرعت روتور (750، 825 و 900 دور بر دقیقه)، زاویه سایش (0، 10، 20 درجه) و فاصله سایش (1.5، 2 و 2.5 میلی‌متر) بودند. تأثیر متغیرهای مستقل بر بازده استخراج، مقدار پروتئین و ویسکوزیته ظاهری (نرخ برش 46 بر ثانیه) بررسی شدند. نتایج بررسی‌ها نشان داد که مدل‌های چند جمله‌ای درجه دوم تغییرات داده‌ها و تأثیر آنها را بر پاسخ‌ها به‌خوبی توصیف می‌کند. بهینه شرایط استخراج با معیار بیشترین بازده، ویسکوزیته ظاهری و کم‌ترین مقدار پروتئین در سرعت روتور 900 دور بر دقیقه، زاویه سایش 6.9 درجه و فاصله 2.2 میلی‌متر حاصل شد که در این شرایط بازده استخراج، مقدار پروتئین و ویسکوزیته ظاهری به ترتیب برابر با 10.61 درصد، 7.02 درصد و 112 میلی ­پاسکال ثانیه دست آمد.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Modelling and Optimization of Dry Extraction Conditions of Sage Seed Gum

چکیده [English]

In this research, sage seed gum was extracted using the dry method (friction-based) and the extraction conditions was optimized by the response surface method and using the box-Behnken design. Dry extraction method was used to achieve an economical, inexpensive, fast, eco-friendly (green technology), continuous, easy usage and automated method. The independent variables in this research were rotor speed (750, 825, 900 rpm), angle of friction (0, 10, 20 degree) and friction distance (1.5, 2, 2.5 mm). The effects of these variables on extraction yield, protein content and apparent viscosity (at a shear rate 46 1/s) were investigated. The results showed that quadratic polynomial models adequately explained the data variation and represented the actual relationship between independent variables and responses. The optimum conditions with maximum extraction yield and apparent viscosity and minimum protein content were achieved when the rotor speed, angle of friction and friction distance were 900 rpm, 6.9 degree, 2.2 mm, respectively. At the optimized conditions, the extraction yield, protein content and apparent viscosity were obtained 10.61%, 7.02%, and 112 mPa.s, respectively

کلیدواژه‌ها [English]

  • Apparent viscosity
  • Green technology
  • Friction
  • Seed mucilage
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