تولید مه مواد مغذی گیاه به روش فراصوت جهت به‌کارگیری در سامانه‌های هواکشت: امکان‌سنجی و بررسی برخی از عوامل مؤثر

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشجوی دکتری گروه مهندسی مکانیک بیوسیستم، دانشکده مهندسی و فناوری، پردیس کشاورزی و منابع طبیعی، دانشگاه تهران

2 استادیار گروه مهندسی مکانیک بیوسیستم ، دانشکده مهندسی و فناوری، پردیس کشاورزی و منابع طبیعی، دانشگاه تهران

3 دانشیار گروه مهندسی فناوری صنایع غذایی، پردیس ابوریحان، دانشگاه تهران

4 استاد گروه مهندسی مکانیک بیوسیستم ، دانشکده مهندسی و فناوری، پردیس کشاورزی و منابع طبیعی، دانشگاه

چکیده

روش‌های مرسوم تولید مه در سامانه‌های هوا کشت، معایب و محدودیت‌های چشمگیری دارند. بر این اساس، در راستای به‌کارگیری فناوری تولید مه به روش امواج فراصوت، امکان‌سنجی اولیه انجام گرفت. اثر چهار متغیر مستقل، یعنی ارتفاع مایع بالای پیزوالکتریک در سه سطح 20، 30 و 40 میلی­متر، ابعاد مخزن تولید مه در سه سطح، موقعیت قرارگیری پیزوالکتریک در کف مخزن در سه سطح، و غلظت کود در محلول در چهار سطح 0، 5/2، 5، و 5/7 گرم در لیتر، بر سه متغیر وابستۀ نرخ تولید مه، تغییرات رسانایی الکتریکی، و مجموع مواد جامد محلول بررسی شدند. اثر سه متغیر غلظت، موقعیت پیزوالکتریک، و ابعاد مخزن بر میزان نرخ تولید مه در سطح احتمال 1% و اثر ارتفاع محلول در سطح احتمال 5% معنی­دار بودند. نتایج نشان می‌دهند که سامانه فراصوتی در دامنه خاصی از غلظت محلول، موادمغذی محلول در آب را بهتر منتقل می­کند.

 Ultrasonic Production of Plant Nutrients Mist to Use in Aeroponic Systems: Feasibility and Investigation of Some Effective Parameters

کلیدواژه‌ها


عنوان مقاله [English]

Ultrasonic Production of Plant Nutrients Mist to Use in Aeroponic Systems: Feasibility and Investigation of Some Effective Parameters

نویسندگان [English]

  • Amir Hossein Mirzabe 1
  • Ali Hajiahmad 2
  • Ali Fadavi 3
  • Shahin Rafiee 4
1 PHD student, Department of Mechanics of Biosystem Engineering, Faculty of Engineering & Technology, College of Agriculture & Natural Resources, University of Tehran, Karaj, Iran
2 Assistant Professor, Department of Mechanics of Biosystem Engineering, Faculty of Engineering & Technology, College of Agriculture & Natural Resources, University of Tehran, Karaj, Iran
3 Associate Professor, Department of Food Technology Engineering, College of Aboureyhan, University of Tehran, Tehran, Iran
4 Professor, Department of Mechanics of Biosystem Engineering, Faculty of Engineering & Technology, College of Agriculture & Natural Resources, University of Tehran, Karaj, Iran
چکیده [English]

Common fog production methods in aeroponic systems have some the disadvantages and limitations. So, an initial study was carried out to assess the feasibility to use the fog production technology through ultrasound. The effect of four independent variables, namely, over piezoelectric fluid head at three levels of 20, 30 and 40 mm, three levels of reservoir dimensions, three levels of piezoelectric location at the bottom of the reservoir, and fertilizer concentration in solution at four levels of 0, 2.5, 5, and 7.5 g.L-1 on fog production rate, electrical conductivity changes, and total dissolved solids as dependent variables were investigated. The effects of three variables of concentration, piezoelectric position and reservoir dimensions on the rate of fog production were significant at 1% probability level. Also, the effect of fluid head was significant at probability level of 5%. The results indicated that the water-soluble nutrients could be transported better by ultrasound at a certain range of soluble concentrations.

کلیدواژه‌ها [English]

  • Piezoelectric
  • fog production rate
  • Electrical conductivity
  • Total dissolved solids
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