Effect of Landfill Leachate Salinity on the Performance of Hybrid Vertical Flow Treatment Wetlands under Equatorial Climate.
Publication Date: 10/03/2025
Author(s): Fendoung Dejiang Guy Hector, Sieliechi Joseph, Ngassoum Martin Benoît.
Volume/Issue: Volume 5 , Issue 1 (2025)
Abstract:
In this study, vertical flow treatment wetlands performances on landfill leachate operated under equatorial climate have been assayed during 2 years. Two pilots planted with Echinochoa Pyramidalys Lam have been operated. Effluent electrical conductivities (EC) measured at each of the four different seasons with the values of 2.5±0.5; 6±1; 7±2 and 9±1 mS/cm for long rain, short rain, short dry and long dry respectively; were used to determined COD and TN treatment performances. According to the experimental results, EC, pH, COD and TN decrease at different treatment stage. The evaluation of treatment system Removal Rate (RR) showed highest value of 66±6% for RRCOD and 79±6% for RRTN both obtained during long rain season. The highest RMCOD (171±9 gm-2d-1) and RMTN (4±1gm-2d-1) was obtained during short rain season. This work will help to design a full scale TW for LL under equatorial climate in Africa.
Keywords:
Hybrid vertical treatment wetland, equatorial climate, landfill leachate, salinity , Echinochloa pyramidalis.
