بررسی اثر پارامترهای عملیاتی بر تصفیة فاضلاب توسط راکتور ناپیوستة متوالی

نوع مقاله: مقاله علمی

نویسندگان

1 مشهد، دانشگاه فردوسی، دانشکدة مهندسی

2 مشهد، دانشگاه فنی وحرفه ای، دانشکدة ثامن الحجج

چکیده

به دلیل رشد جمعیت و فعالیت های انسانی در بخش های کشاورزی و صنعت، آب سالم و بهداشتی دچار کمبود شده است. صنعت تولید نشاسته یکی از صنایع آلایندة منابع آبی است که با توجه به زیاد بودن بار آلودگی، مضرات زیست محیطی و استاندارد های خروجی پساب، تصفیه و بازیابی آنها اهمیت دارد. در این تحقیق، پس از ساخت راکتور ناپیوستة متوالی (اس بی آر)، اثر متغیرهای دما، عمق هوادهی، تفاوت در میزان سازگاری لجن به مادة آلی (نشاسته) و سرعت بارگذاری مادة آلی (او ال آر) بر بازده راکتور بررسی شد. آزمایش ها با نرم افزار دیزاین اکسپرت طراحی شدند و در راکتورهای 1 SBR و 2 SBR که به ترتیب با 500 و 1500 میلیگرم در لیتر مادة آلی تطابق یافته بودند، انجام گرفتند. میزان حذف اکسیژن مورد نیازشیمیایی (سی او دی) به عنوان پاسخ فرایند اندازه گیری شد. براساس نتایج، پاسخ آزمایش ها با مدل پیش بینی شده در تطابق بود. در دمای C 25 راندمان حذف بالا و به طور متوسط 85/6 درصد بود. متوسط راندمان حذف سی او دی در SBR 2، 12 درصد بیشتر از SBR 1 بود. بازده راکتورها در هوادهی عمقی نسبت به هوادهی میانی و سطحی بیشتر بود. در شرایط بهینه، راندمان حذف سی او دی به 96/36 درصد رسید. براساس نتایج، راکتور ناپیوستة متوالی گزینة مناسبی برای تصفیة فاضلاب حاوی نشاسته است.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Investigation of Operating Parameters on Wastewater Treatment Using Sequencing Batch Reactor

نویسندگان [English]

  • Seyed Mohammad Ali Masoudi 1
  • Javad Sargolzaei 1
  • Abolfazl Darrodi 2
1 School of Chemical Engineering, College of Engineering, Ferdowsi University of Mashhad, P.O. Box 91779-48944 , Mashhad, Iran
2 School of Chemistry, Samen-Alhojaj Faculty of Mashhad, Technical and Vocational University, P. O. Box 91864-59433, Mashhad, Iran
چکیده [English]

Due to the population growth and human activities in the agricultural and industrial fields, healthy and sanitary water has become scarce. Due to its high contamination load, environmental harms and water discharge standards, starch producing industry is regarded as one of the industries polluting water sources which its treatment and recovery remains important. In the present study, after fabrication of sequencing batch reactor (SBR), the effects of temperature, respiration depth, difference between sludge acclimation to organic matter (starch) and organic loading rate on reactor efficiency have been investigated. The experiments were designed using Design Expert Software and carried out in reactors named and which were acclimatized with 500 mg/l and 1500 mg/l organic substrates, respectively. Chemical oxygen demand (COD) removal percentage was measured as process response. According to the results, the experimental responses were in agreement with predicted models. In 25℃, the removal performance was high and it was 85.6% in average. In comparison with , the average COD removal efficiency was 12% higher in . The reactors performances in deep respiration were higher than middle and surface respiration. In optimal conditions, the COD removal efficiency was as high as 96.36%. Consequently, it is safe to note that sequencing batch reactor is an appropriate option for treating “starch-containing wastewater”.

کلیدواژه‌ها [English]

  • Sequencing batch reactor
  • Wastewater treatment
  • Analysis of Variance
  • Response Surface Methodology
  • starch
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