Document Type : Original Article
Authors
1
Department of Environmental Health Engineering, Student Research Committee, Kurdistan University of Medical Sciences, Sanandaj, Iran
2
Water Resources Engineering Department, Faculty of Agriculture, Isfahan University of Technology, Isfahan, Iran
3
Soil Engineering Department, Department of Natural Resources, Kurdistan University of Technology, Sanandaj, Iran
4
Watershed Engineering Department, Department of Natural Resources, Isfahan University of Technology, Isfahan, Iran
5
Bachelor of Engineering in Civil Engineering, Kurdistan University of Engineering, Sanandaj, Iran
6
Assistant prof, Department of Natural Resources and Environment, Central Tehran Branch, Islamic Azad University, Tehran, Iran
Abstract
Background: More than 85% of urban wastewater is water, so after the construction of a wastewater treatment plant, it is necessary to evaluate the continuous performance of wastewater treatment systems to achieve optimal environmental standards. The purpose of this study was to evaluate the performance of the activated sludge process of the Sanandaj wastewater treatment plant in the treatment of pollutants.
Methods: This descriptive cross-sectional study was performed on an activated sludge treatment plant in Sanandaj for 12 months. In this study, a total of 48 samples of inlet and outlet wastewater removed, and the experiments performed monthly. The efficacy of the treatment plant evaluated by measuring the quality parameters of wastewater, including chemical oxygen demand (BOD5), chemical oxygen demand (COD), and total suspended solids (TSS) based on the standard method book.
Results: The results showed that the mean concentrations of BOD5, COD, and TSS in the input wastewater were 135.6, 220.23, and 155.82 respectively, and these parameters in the effluent were respectively 11.9, 18.9 and 12.9 mg/Lit obtained. The mean total coliforms in the effluent and effluent were 6500 and 625,100ml / MPN, and fecal coliform in the effluent and effluent were 2425 and 262.55 100ml / MPN, respectively.
Conclusion: Since the average efficiency of the Sanandaj wastewater treatment plant on average wastewater pollutant removal efficiencies is about 88.91% on average, so the activated sludge system used in this treatment plant is efficient and the effluent is in compliance with current standards for the parameters studied
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