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Water 2016, 8(2), 51; doi:10.3390/w8020051

Efficiency of a Horizontal Sub-Surface Flow Constructed Wetland Treatment System in an Arid Area

1
Department of Bioenvironmental Systems Engineering, National Taiwan University, Taipei 10617, Taiwan
2
Ecological Engineering Research Center, National Taiwan University, Taipei 10617, Taiwan
3
National Center for Agricultural Research and Extension, Al-Baqa’a 19381, Jordan
These authors contributed equally to this work.
*
Author to whom correspondence should be addressed.
Academic Editors: Alan Howard and Defu Xu
Received: 30 November 2015 / Revised: 25 January 2016 / Accepted: 1 February 2016 / Published: 5 February 2016
(This article belongs to the Special Issue Constructed Wetlands Systems and Management)
View Full-Text   |   Download PDF [807 KB, uploaded 5 February 2016]   |  

Abstract

The main objective of this study was to evaluate the performance and treatment efficiency of the Horizontal Sub-Surface Flow Constructed Wetland treatment system (HSF-CW) in an arid climate. Seventeen sub-surface, horizontal-flow HSF-CW units have been operated for approximately three years to improve the quality of partially-treated municipal wastewater. The studied design parameters included two sizes of volcanic tuff media (i.e., fine or coarse), two different bed dimensions (i.e., long and short), and three plantation types (i.e., reed, kenaf, or no vegetation as a control). The effluent Biological Oxygen Demand (BOD5), Chemical Oxygen Demand (COD), Total Suspended Solid (TSS), and phosphorus from all of the treatments were significantly lower as compared to the influent and demonstrated a removal efficiency of 55%, 51%, 67%, and 55%, respectively. There were significant increases in Electrical Conductivity (EC), sulfate, and calcium in the effluent of most HSF-CWs due to evaporative concentration and mineral dissolution from the media. The study suggests that unplanted beds with either fine or coarse media are the most suitable combinations among all of the studied designs based on their treatment efficiency and less water loss in arid conditions. View Full-Text
Keywords: water reuse; constructed wetland; wastewater treatment; removal efficiency; Jordan water reuse; constructed wetland; wastewater treatment; removal efficiency; Jordan
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Albalawneh, A.; Chang, T.-K.; Chou, C.-S.; Naoum, S. Efficiency of a Horizontal Sub-Surface Flow Constructed Wetland Treatment System in an Arid Area. Water 2016, 8, 51.

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