نوع مقاله : مقاله کامل پژوهشی
نویسندگان
1 گروه مهندسی عمران دانشگاه اصفهان
2 رئیس اداره بهرهبرداری و توسعه فاضلاب دلیجان، شرکت آب و فاضلاب استان مرکزی
3 رئیس گروه بهرهبرداری و توسعه شبکههای جمعآوری و خطوط انتقال فاضلاب، شرکت آب و فاضلاب استان مرکزی
4 معاون منابع انسانی و تحقیقات شرکت آب و فاضلاب استان مرکزی
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
The performance of waste stabilization ponds, including anaerobic and facultative ponds (FP), was evaluated in long term, full scale and real operating conditions of Delijan wastewater treatment plant. Here, the primary objective was to compare the impacts of FPs layout in series (S) and parallel (P). Moreover, the effectiveness of FP pre-aeration was also testified in pilot scale. For these purposes, the experimental results with supplementary analysis (2008-2021) of BOD, COD, TSS, TKN, and fecal coliform were compared in S and P scenarios in both cold and warm seasons through Minitab 19 software. The average BOD and COD removal efficiencies of this WWTP were 79% and 78%, respectively in which their differences in S and P scenarios (65%-70%) were not significant for FPs with 95% confidence interval. However, evaluations showed that FPs with S layout has more reliable performance, particularly in cold seasons. Here, BOD/COD ratio and TSS concentration of treated wastewater were 10% and 19% less than FP with P formation. In addition, TKN removal was 13% higher in FPs with S layout. In a nutshell, S formed FPs could remove biodegradable compounds more completely than P layout. Pre-aeration could also improve TKN removal about 10% and reduce BOD/COD ratio about 26%.
کلیدواژهها [English]