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Article

Seasonal Enhancement of Nitrogen Removal on Domestic Wastewater Treatment Performance by Partially Saturated and Saturated Hybrid Constructed Wetland

1
Engineering and Environmental Biotechnology Group, Environmental Science Faculty & Center EULA-Chile, Universidad de Concepción, Concepción 4070386, Chile
2
Facultad de Ingeniería y Ciencias, Universidad Adolfo Ibáñez, Avda. Padre Hurtado 750, Viña del Mar 2562340, Chile
*
Author to whom correspondence should be addressed.
Academic Editors: Dibyendu Sarkar, Rupali Datta, Prafulla Kumar Sahoo, Mohammad Mahmudur Rahman and Christos S. Akratos
Water 2022, 14(7), 1089; https://doi.org/10.3390/w14071089
Received: 27 January 2022 / Revised: 9 March 2022 / Accepted: 20 March 2022 / Published: 30 March 2022
(This article belongs to the Topic Sustainable Environmental Technologies)
The aim of this study is to evaluate seasonal enhancement of nitrogen removal on domestic wastewater treatment performance by partially saturated and saturated HBCWs. To achieve this, two HBCWs consisting of a vertical subsurface flow constructed wetland, followed by a horizontal subsurface flow constructed wetland (VSSF-HSSF) were evaluated. Two saturation levels were used: (a) partially saturated HB1:VSSF1 (0.6 m)-HSSF1 (0.15 m), (b) saturated HB2: VSSF2 (0.8 m)-HSSF2 (0.25 m). Each unit was planted with Schoenoplectus californicus and was operated for 297 days. The removal efficiencies in HB1 and HB2 were above 70%, 86%, 77% and 55% for chemical oxygen demand (COD), total suspended solids (TSS), nitrogen as ammonium (NH4+-N), and total nitrogen (TN), respectively. For VSSF, a higher level of saturation (from 0.6 to 0.8 m) meant a decrease of 17% in the TN removal efficiencies, and for HSSF, an increase from 0.15 to 0.25 m of saturation meant a decrease of 11 and 10% in the NH4+-N and TN removal efficiencies, respectively. Thus, the increase of saturation level in HBCWs reduces the transformation and/or removal of components of the wastewaters to be treated, particularly nitrogen. Through this research, the possibility of optimizing the transformation of nitrogen with partially saturated hybrids can be examined. View Full-Text
Keywords: hybrid constructed wetland; saturation level; organic matter; ammonia hybrid constructed wetland; saturation level; organic matter; ammonia
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MDPI and ACS Style

Contreras, J.; López, D.; Gómez, G.; Vidal, G. Seasonal Enhancement of Nitrogen Removal on Domestic Wastewater Treatment Performance by Partially Saturated and Saturated Hybrid Constructed Wetland. Water 2022, 14, 1089. https://doi.org/10.3390/w14071089

AMA Style

Contreras J, López D, Gómez G, Vidal G. Seasonal Enhancement of Nitrogen Removal on Domestic Wastewater Treatment Performance by Partially Saturated and Saturated Hybrid Constructed Wetland. Water. 2022; 14(7):1089. https://doi.org/10.3390/w14071089

Chicago/Turabian Style

Contreras, José, Daniela López, Gloria Gómez, and Gladys Vidal. 2022. "Seasonal Enhancement of Nitrogen Removal on Domestic Wastewater Treatment Performance by Partially Saturated and Saturated Hybrid Constructed Wetland" Water 14, no. 7: 1089. https://doi.org/10.3390/w14071089

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