مدل‌سازی سینتیکی راکتور بستر متحرک ناپیوسته متوالی بیوفیلمی با جریان پیوسته در تصفیه فاضلاب مصنوعی

نوع مقاله: مقاله پژوهشی

نویسندگان

1 استادیار گروه مهندسی بهداشت محیط، دانشکده بهداشت، دانشگاه آزاد اسلامی واحد علوم پزشکی تهران

2 دانشیار گروه مهندسی محیط زیست، دانشکده محیط زیست و انرژی، دانشگاه آزاد اسلامی واحد تهران غرب

3 کارشناس ارشد مهندسی محیط زیست، دانشگاه آزاد اسلامی واحد تهران غرب

چکیده

هدف از این پژوهش مدل‌سازی سینتیکی راکتور بستر متحرک ناپیوسته متوالی بیوفیلمی با جریان پیوسته و ارائه بهترین مدل پیش‌بینی برای این فرایند بود. به این منظور راکتور MSCR شامل یک پایلوت هوازی- انوکسیک با حجم 50 لیتر و یک پایلوت بی‌هوازی با حجم 20 لیتر ساخته و راه‌اندازی شد. راکتور مورد بحث در نرخ‌های بارگذاری و زمان ماند هیدرولیکی مختلف با استفاده از فاضلاب مصنوعی در غلظت‌های ورودی 300 تا 1000 میلی‌گرم در لیتر COD مورد بررسی قرار گرفت. براساس نتایج به‌دست آمده و بهترین شرایط راهبری سیستم، بالاترین میزان حذف COD در بارگذاری آلی، 500 میلی‌گرم بر لیتر و به میزان 6/98 درصد به‌دست آمد. برای مدل‌سازی فرایند از سه مدل حذف آلاینده‌ مرتبه اول، مدل گراو و مدل استور-کینکنون استفاده شد. با توجه به تحلیل سینتیکی حذف، مدل استور-کینکنون به‌عنوان مناسب‌ترین مدل برای مدل‌سازی فرایند بیوفیلمی با بستر متحرک انتخاب شد. با توجه به ویژگی‌های بسیار مناسب این مدل در رابطه با پیش‌بینی میزان حذف ماده آلی در بارهای آلی مختلف، استفاده از این مدل در جهت طراحی و بهره‌برداری مناسب از سیستم MSCR پیشنهاد می‌شود.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Kinetic Modeling of Synthetic Wastewater Treatment by the Moving-bed Sequential Continuous-inflow Reactor (MSCR)

نویسندگان [English]

  • Mohammadreza Khani 1
  • Seyed Mostafa Khezri 2
  • Vida Gholamiparvar Masooleh 3
1 Ass. Prof. of Environmental Health Engineering, Faculty of Public Health, Islamic Azad University, Tehran Medical Sciences Branch, Tehran
2 Assoc. Prof. of Environmental Health Engineering, Faculty of Environment and Energy, Islamic Azad University, West Tehran Branch, Tehran
3 Former Graduate Student of Environmental Engineering, Islamic Azad University, West Tehran Branch, Tehran
چکیده [English]

It was the objective of the present study to conduct a kinetic modeling of a Moving-bed Sequential Continuous-inflow Reactor (MSCR) and to develop its best prediction model. For this purpose, a MSCR consisting of an aerobic-anoxic pilot 50 l in volume and an anaerobic pilot of 20 l were prepared. The MSCR was fed a variety of organic loads and operated at different hydraulic retention times (HRT) using synthetic wastewater at input COD concentrations of 300 to 1000 mg/L with HRTs of 2 to 5 h. Based on the results and the best system operation conditions, the highest COD removal (98.6%) was obtained at COD=500 mg/L. The three well-known first order, second order, and Stover-Kincannon models were utilized for the kinetic modeling of the reactor. Based on the kinetic analysis of organic removal, the Stover-Kincannon model was chosen for the kinetic modeling of the moving bed biofilm. Given its advantageous properties in the statisfactory prediction of organic removal at different organic loads, this model is recommended for the design and operation of MSCR systems.

کلیدواژه‌ها [English]

  • Synthetic Wastewater
  • Reaction Kinetic
  • MSCR
  • Biofilm
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