بهینه‌سازی فرایند تصفیه بیولوژیکی فاضلاب شهرک صنعتی در راکتور زیستی ناپیوسته منقطع با هوادهی متناوب

نوع مقاله: مقاله پژوهشی

نویسندگان

1 کارشناسی ارشد شیمی کاربردی، دانشکده شیمی، دانشگاه رازی، کرمانشاه

2 استادیار گروه شیمی کاربردی، دانشکده شیمی دانشگاه رازی- کرمانشاه

چکیده

در این مقاله، حذف همزمان کربن و مواد مغذی (نیتروژن و فسفر) از فاضلاب شهرک صنعتی فرامان در یک راکتور زیستی ناپیوسته منقطع با کنترل زمان هوادهی بررسی شد. آزمایش‌ها بر اساس طراحی ترکیب مرکزی (CCD) سازمان‌دهی و سپس با استفاده از روش پاسخ سطحی ((RSM، تحلیل شدند. زمان واکنش و زمان هوادهی به‌منظور تحلیل، مدل‌سازی و بهینه‌سازی فرایند انتخاب شدند و نه پارامتر وابسته به‌عنوان پاسخ‌های فرایندی اندازه‌گیری و محاسبه شدند. دامنه تغییرات زمان واکنش و زمان هوادهی به ترتیب 12 تا 36 ساعت و 40 تا 60 دقیقه بر ساعت انتخاب شد. زمان واکنش به‌عنوان مهم‌ترین متغیر شناخته شد که اثر کاهشی بر راندمان حذف کل اکسیژن شیمیایی مورد نیاز (TCOD)، سهم اکسیژن شیمیایی مورد نیاز با تجزیه‌پذیری بیولوژیکی آهسته sbCOD))، کل نیتروژن (TN) و کل فسفر (TP) نشان داد. شرایط بهینه عملکرد راکتور زیستی در زمان واکنش 12 تا 16 ساعت و زمان هوادهی 40 تا 60 دقیقه بر ساعت به‌دست آمد.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Optimization of Biological Treatment of an Industrial Wastewater in an Intermittent Aeration Sequencing Batch Reactor

نویسندگان [English]

  • Azar Asadi 1
  • Ali Akbar Zinatizadeh 2
2 Assist. Prof. of Chemistry, Faculty of Sciences, Razi University, Kermanshah
چکیده [English]

In this paper, the simultaneous removal of carbon and nutrients (nitrogen and phosphorus) from Faraman’s industrial wastewater (FIW) in a time-based sequencing batch reactor (SBR) was investigated. The experiments were conducted based on a central composite design (CCD) and analyzed using the response surface methodology (RSM). Reaction and aeration times were selected for the purposes of analyzing, modeling, and optimizing the process. Nine dependent parameters were monitored as process responses. The region of exploration for the process was taken as the area enclosed by the boundaries of reaction time (12-36 h) and aeration time (40-60 min/h). Reaction time was found to be the most effective variable and showed a decreasing impact on the total chemical oxygen demand (TCOD), slowly-biodegradable chemical oxygen demand (sbCOD), total nitrogen (TN), and total phosphorus (TP) removal efficiencies. The optimum operating conditions were determined in the range of 12 to 16 h for the reaction time and 40 to 60 min/h for the aeration time.

کلیدواژه‌ها [English]

  • Faraman’s Industrial Estate Wastewater
  • SBR
  • Simultaneous Carbon and Nutrients Removal
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