Laleh R. Kalankesh - Department of Environmental Health Engineering, School of Health and Health Sciences Research Center, Student ResearchCommittee, Mazandaran University of Medical Sciences, Sari, Iran
Susana Rodríguez-Couto - Ceit, Paseo Manuel de Lardizábal ۱۵, ۲۰۰۱۸, San Sebastian, Spain, Universidad de Navarra, Tecnun, Paseo Manuel de Lardizábal ۱۳,۲۰۰۱۸, San Sebastian, Spain IKERBASQUE, Basque Foundation for Science, Maria Diaz de Haro ۳, ۴۸۰۱۳, Bilbao, Spain
Yousef Dadban Shahamat - Environmental Health Research Center, Department of Environmental Health Engineering, Faculty of Health, Golestan University ofMedical Sciences, Gorgan, Iran
Hossein Ali Asgarnia - Department of Environmental Health Engineering, Babol University of Medical Sciences, Babol, Iran

Background: Constructed wetlands are systems designed based on the utilization of natural processes, including vegetation, soil, and their associated microbial assemblage to assist in treating different types of wastewater.Methods: Two local Appalachian plants (Louis latifolia and Phragmites australis) were planted into smallscale constructed wetlands to treat domestic wastewater in the North of Iran. The influent wastewater and the effluent from each wetland were sampled daily for 120 days. Experiments were conducted based on the mean ± standard deviation (SD) by analysis of variance (ANOVA). Results: It was found that nitrate, phosphate, fecal and total coliforms were reduced by 84.4%, 94.4%, 96.3%, 93.9% for P. australis and 73.3%, 64.0%, 94.4%, 92.1% for L. latifolia, respectively. Conclusion: According to the results, by using the HF-CW technology with L. latifolia and P. australis plants, the treated wastewater fully meets the wastewater discharge parameters of WHO standards.

Nitrate, Phosphate, Wetland, Wastewater treatment, Iran