Comparing the Efficiency of Stabilization Ponds and Subsurface Constructed Wetland in Domestic Sewage Treatment in City of Yazd

Document Type : Research Paper


1 . Ph D Student of Environmental Health, Shahid Sadoughi University of Medical Sciences, Yazd, Iran

2 Civil Engineer, Yazd Wastewater Treatment Plant, Water and Wastewater Company, Yazd, Iran

3 Former Graduate Student of Environment Engineering, Islamic Azad University, Meybod Branch and Operating Engineer of Meybod Wastewater Treament Plant, Yazd, Iran

4 MSc Graduate of Environmental Health, Shahid Sadoughi University of Medical Sciences, Yazd, Iran

5 MSc Student of Environmental Health Engineering, Azad Islamic University, Meybod Branch, and Head of Environmental Chemistry Laboratory, School of Public Health, Shahid Sadoughi University of Medical Sciences, Yazd, Iran

6 BSc of Environmental Health, Kashan University of Medical Sciences, Kashan, Iran


Wastewater is one of the most important contributors to water pollution on the one hand, while it has the potential to serve as an alternative source of water if subjected to proper treatment, on the other. The present study was designed to compare the removal efficiencies of stabilization ponds and subsurface constructed wetlands in the treatment of urban wastewater in Yazd. For this purpose, 72 samples were collected at the inlet and outlet of a constructed wetland as well as 72 from the inlet and outlet of stabilization ponds over a period of one year. The samples were subjected to identical tests and the results were compared. The removal efficiencies for BOD5, COD, TSS, NH4-N, NO3-N, and PO4 in the stabilization ponds were 79.7, 79.6, 44.4, 57, 0, and 42.5 percent, respectively. The same parameters for the constructed wetland system were 80.7, 81.5, 77.7, 9.9, 34, and 59.4, respectively. Moreover, BOD5, COD, TSS, and PO4 removal efficiencies were higher in autumn and summer. From these results, it may be concluded that constructed wetlands are more commercially viable than stabilization ponds both in terms of performance and cost-effectiveness.


Main Subjects

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