Survey of Natural Treatment of Domestic Wastewater by Marzon Abad Wetland in Babol, Iran

Increasing of world population growth causes increasing of water consumption and wastewater production. As well as wastewater discharging to surface and underground waters results to quality decreasing of these resources. One of the most suitable methods for removing contaminants from natural water is the use of wetland structures. The aim of this study was to assess the ability of domestic wastewater treatment by Marzon Abad wetland, Babol, Iran.

In this analytical study, 12 water samples were taken from influent and effluent locations in two seasons of high and low rainfall. The samples were studied for the type and the number of bacteria, physical and chemical parameters such as temperature, turbidity, NO3-1, NH3, PO4-3, PH, EC (Electrical Conductivity), COD (Chemical Oxygen Demand) and BOD (Biochemical Oxygen).

Mean value obtained from wetland influent included BOD5=17.4±5.3, COD=27.4±7.5 and turbidity=317±284, and mean value obtained from wetland effluent included BOD5=10.4±2.3, COD=16.3±4.45 and turbidity=8.7±8. Significant difference between average influents and effluents were observed in the above mentioned parameters (p = 0.027, 0.028 and 0.028, respectively).

The results of this study showed that Marzon Abad wetland has ability to purify domestic wastewater.