92
Table 2. Averages (SD in brackets) of the water quality parameters in the effluent of the
HSSF. Calculations based on 25 to 28 measurements depending on the parameter
Parameter
Cyperus ligularis
Temperature,
o
C
27.7 (±2.1)
Oxygen Dissolve, mg/L
1.8 (±0.9)
E
H
, mV
247.6 (±70.8)
pH,
7.0 (±0.1)
Electric conductivity, uS/cm
557.8 (± 171.8)
The system planted with
C. ligularis
reached 92% removal. This high efficiency
demonstrates that organic matter removal can occur with this macrophyte. These results are
consistent with those reported by Vega
et al
. (2013) respect
C. articulatus
in similar
experimental.
The NH
4
+
–N removal rates were higher, in planted systems with
C. ligularis
(60%) as
compared to solar photoreactor treatment.
These results are still being studied in this research such as the coupled system proposed.
Conclusions
This short-term study revealed that to reach high removal COD and disinfection
efficiencies, 300 ppm (High Range) would be a good dose of peroxide to use.
A coupled system UV-H
2
O
2
solar with pilot scale constructed wetlands for domestic
wastewater treatment could be a good system for COD, Ammonium and Coliforms
removal.
Acknowledgements
Centro de Estudios del Agua of the Universidad del Atlántico who facilitated facilities to
advance research laboratories.
References
APHA-AWWA-WPCF. 2005. Standard Methods for the Examination of Water and
Wastewater, 19th ed. American Public Health Association. Washington, DC.
Arroyave. Tratamiento de Aguas Residuales por medio de un sistema acoplado de
fotocatálisis – humedales. Universidad EAFIT. 2008.
Charris, J. C., A. Caselles-Osorio. 2014. Efficiency removal of contaminants domestic
wastewater with horizontal sub surface flow constructed wetlands planted with
Cyperus
liguralis
(Cyperaceae)
Colonum Echinochloa
(Poaceae)
