This study investigated, using a lithium salt tracer, how macrophyte species and hydraulic loading rate (HLR) of wastewater influenced hydraulics in constructed wetlands (CWs). Four pilot-scale CWs received 45 mm day−1 of pre-treated sugar factory effluent and another four received 110 mm day−1. Half the CWs were planted with Cyperus papyrus and half with Echinochloa pyramidalis. Results showed a significant negative connection between tracer mass recovery and wetland water leakages. Also, a significant negative relationship between active wetland water volume and macrophyte density was detected. Further, a significant effect of HLR on mass removal rates of NH4+-N was observed. However, no significant effect of either HLR or macrophyte species on wetland hydraulic parameters was found.
Hydraulic performance of small free water surface constructed wetlands treating sugar factory effluent in western Kenya
Hristina Bodin, Jesper Persson; Hydraulic performance of small free water surface constructed wetlands treating sugar factory effluent in western Kenya. Hydrology Research 1 August 2012; 43 (4): 476–488. doi: https://doi.org/10.2166/nh.2012.133
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