Quality Assessment of Wastewater Treatment Plant Effluent and Irrigation Aptitude

The aim of the present study was to assess the irrigation aptitude of treated effluent from a wastewater treatment plant in Korhogo, a city located in the north of Côte d’Ivoire. Physicochemical characteristics of the treated effluent collected over seven weeks were determined and agronomic quality parameters were calculated (SAR, %Na, KR…). Projection of the chemical elements on Piper diagram showed that the hydrofacies of the treated effluent was of chloride – sulfate, calcium – magnesium type. Agronomic water quality parameters indicated that the treated effluent ranged from good to acceptable, inducing a low risk for soil salinization and alkalinization. One water class was identified: class C3S1, characteristic of water generally suitable for irrigation of crops moderately tolerant to salts, on well-drained or well-permeable soils.