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Hybrid constructed wetlands system with intermittent feeding applied for urban wastewater treatment in South Brazil

Zuse Rousso, Benny, Pelissari, C, Santos, MOD and Sezerino, PH 2019, Hybrid constructed wetlands system with intermittent feeding applied for urban wastewater treatment in South Brazil, Journal of Water, Sanitation and Hygiene for Development, vol. 9, no. 3, pp. 559-570, doi: 10.2166/washdev.2019.010.

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Title Hybrid constructed wetlands system with intermittent feeding applied for urban wastewater treatment in South Brazil
Author(s) Zuse Rousso, Benny
Pelissari, C
Santos, MOD
Sezerino, PH
Journal name Journal of Water, Sanitation and Hygiene for Development
Volume number 9
Issue number 3
Start page 559
End page 570
Total pages 12
Publisher IWA Publishing
Place of publication London, Eng.
Publication date 2019-09-01
ISSN 2043-9083
2408-9362
Keyword(s) hydraulic regime
startup
temporal performance
Thypha domingensis
vertical and horizontal flow constructed wetlands
Summary Abstract Hybrid constructed wetlands composed by vertical flow constructed wetland (VFCW) followed by horizontal subsurface flow constructed wetland (HFCW) are a wastewater treatment technology employed worldwide. However, there are few studies of their application in Brazil. Treatment performance is not achieved directly after the start of operation and may change according to external conditions over time. This paper evaluated a VFCW–HFCW hybrid system applied to treat urban wastewater in southern Brazil during the first 70 operational weeks. The system was operated with cycles of rest and feed periods. The results point to the first 10 weeks of operation as a transitioning period, especially for VFCW, after which chemical oxygen demand (COD) (from 77% to 90%) and total suspended solids (TSS) (from 90% to 100%) removal performances stabilized and reached their peak rates. Factors such as rainfall precipitation, macrophytes' adaptation, and time of operation affected pollutants' removal. Regardless of the fluctuations throughout the period, the hybrid system presented resilience by generating excellent average removal rates. It showed a mean removal efficiency of 99% for TSS, 98% for COD, 69% for total nitrogen (TN), 91% for NH4+-N, and 96% for P-PO43−. Moreover, the effluent was always suitable to be discharged into the environment according to Brazilian national and state regulations.
Language eng
DOI 10.2166/washdev.2019.010
Field of Research 0502 Environmental Science and Management
0907 Environmental Engineering
1205 Urban and Regional Planning
HERDC Research category C1.1 Refereed article in a scholarly journal
Free to Read? Yes
Persistent URL http://hdl.handle.net/10536/DRO/DU:30156939

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Every reasonable effort has been made to ensure that permission has been obtained for items included in DRO. If you believe that your rights have been infringed by this repository, please contact drosupport@deakin.edu.au.