Open AccessRemoval efficiency of nitrate, phosphate, fecal and total coliforms by horizontal subsurface flow-constructed wetland from domestic wastewater
Author(s) -
Laleh R. Kalankesh,
Susana RodríguezCouto,
Yousef Dadban Shahama,
Hossein Ali Asgarnia
Publication year - 2019
Publication title -
environmental health engineering and management
Language(s) - English
Resource type - Journals
eISSN - 2423-4311
pISSN - 2423-3765
DOI - 10.15171/ehem.2019.12
Subject(s) - phragmites , wastewater , wetland , fecal coliform , environmental science , effluent , constructed wetland , environmental engineering , sewage treatment , nitrate , subsurface flow , hydrology (agriculture) , water quality , ecology , biology , groundwater , engineering , geotechnical engineering
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. Keywords: Nitrate, Phosphate, Wetland, Wastewater treatment, Iran
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