Inderscience Publishers

Performance studies on constructed wetland for treatment of crocodile pond wastewater

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Crocodile pond wastewater has high Biochemical Oxygen Demand (BOD5) (100 mg/L), phosphorus (6 mg/L) and nitrogen (30 mg/L). In the present study a Vertical Flow (VF) constructed wetland treatment system planted with Arundo donax was employed to achieve the wildlife discharge standards (BOD
5
<2 mg/L). Maximum Chemical Oxygen Demand (COD) removal of 68 ? 11% and 77 ? 6.2% was achieved at an organic loading rate of 80 and 120 g COD/m?/day, respectively, and the corresponding Total Kjeldahl Nitrogen (TKN) removal of around 82 ? 4.4 and 86 ? 9% was also achieved, respectively, for the same.

Keywords: crocodile pond wastewater, constructed wetlands, vertical subsurface flow, Macrophyte, Arundo donax, bulrush, organic removal, nutrient removal, wastewater treatment, chemical oxygen demand, COD

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