ارزیابی کارکرد تصفیه‌خانه‌های فاضلاب در پنج شهر استان آذربایجان غربی

نوع مقاله: مقاله پژوهشی

نویسندگان

1 کارشناس ارشد، دانشگاه علوم پزشکی ارومیه

2 استاد گروه مهندسی بهداشت محیط، دانشکده بهداشت، دانشگاه علوم پزشکی ایران، تهران

3 استاد گروه مهندسی بهداشت محیط، دانشکده بهداشت، دانشگاه علوم پزشکی تهران

چکیده

در این پژوهش، کارایی تصفیه‌خانه‌های فاضلاب ارومیه، خوی، میاندوآب، سلماس و بوکان در سال‌های 1387 تا 1390، بر پایه رویکرد قابلیت اطمینان ارزیابی شد. این رویکرد، بازدهی کلی تصفیه‌خانه و فرایندهای آن را پیش‌بینی می‌نماید و غربالگری فناوری‌های تصفیه را امکان‌پذیر می‌سازد. اطلاعات BOD5 ، COD و TSS از طریق سوابق ثبت‌ شده در شرکت آب و فاضلاب آذربایجان غربی، بررسی محلی و مصاحبه بااپراتورها جمع‌آوری شد. تحلیل آماری با استفاده از نرم‌افزار SPSS انجام شد.برای تعیین قابلیت اطمینان مشاهده‌ای، قابلیت اطمینان ارزیابی شده، ضریب اطمینان‌پذیری و درصدهای مورد انتظار مطابقت با استانداردهای تخلیه، از روش معتبر مدل‌سازی نیکو و همکاران استفاده شد. نتایج به‌دست آمده نشان داد که خصوصیات پساب خروجی تصفیه‌خانه‌ها از نظر پارامترهای بررسی شده، عمدتاً از توزیع لگاریتمی نرمال تبعیت می‌کنند. در تمام تصفیه‌خانه‌ها‌ی مورد بررسی، قابلیت اطمینان مشاهده‌ای و قابلیت اطمینان ارزیابی شده و درصدهای مورد انتظار مطابقت با استانداردهای تخلیه، رابطه معنی‌داری با هم داشتند. فرایندهای SBR و بیولاک نسبت به لاگون‌ها‌ی هوادهی دارای بیشترین مقدار قابلیت اطمینان مشاهده‌ای (90 تا 100 درصد)،قابلیت اطمینان ارزیابی (93 تا 100 درصد)، درصد مورد انتظار برآورد استاندارد (95 تا 97/99) و کمترین مقدار COR (41/0 تا 64/0) بودند. بنابراین ضرایب به‌دست آمده در این بررسی را می‌توان برای طرح‌ها‌ی توسعه و احداث سیستم‌ها‌ی مشابه به‌کار برد.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Reliability Performance Assessment of Wastewater Treatment Plants in Assessment of the Reliability Performance of WWTPs in West Azarbaijan

نویسندگان [English]

  • Sayyad Bodaghi 1
  • mitra gholami 2
  • Mehdi Farzadkia 2
  • Ramin Nabizadeh 3
1 MSc in Environmental Engineering, Urumia University of Medical Sciences, Urumia
2 Prof., Dept. of Environmental Health Eng., School of Public Health, Iran University of Medical Sciences, Tehran
3 Prof., Dept. of Environmental Health Eng., School of Public Health, Tehran University of Medical Sciences, Tehran
چکیده [English]

Performance of wastewater treatment plants (WWTPs) in Urmia, Khoy, Miandoab, Salmas, and Bookan were evaluated during the years 2008 to 2011 based on the reliability approach. The approach predicts the overall performance of WWTPs and their processes and, thereby, makes the screening of treatment technologies possible. The required BOD5, COD, and TSS data were collected using the records available at West Azerbayejan Water and Wastewater Company, local surveys, and interviews with operators. Statistical analysis was performed by SPSS. The valid Niku modeling was employed to calculate the Rmeasured , Revaluated, COR, and expected percentages of compliance with discharge standards and a significant relationship was found among these parameters. The results also showed the log normal distribution of effluent characteristics. Furthermore,SBR and biolac processes exhibited higher values of Rmeasured (90-100%), Revaluated (93-100%), and expected percentages of compliance with the discharge standards (95-99.97%) in all the WWTPs studied but lower values of COR (0.41-0.64) than those in aerated lagoons. The coefficients obtained in this study can, therefore, be used for the development and construction designs of similar systems.

کلیدواژه‌ها [English]

  • Wastewater Treatment Plant
  • Reliability Performance
  • Aerated lagoons
  • Biolac
  • SBR
  • Coefficient of Reliability
  • West Azarbayejan
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