Paucity of freshwater is becoming an increasing problem in Nigeria, hence, the need to use other source of water for irrigation purposes. This study was conducted to investigate the effect of treated greywater on some growth parameters of pepper in Akure, Nigeria. Raw greywater was collected from Jadesola female hostel, Federal University of Technology, Akure (FUTA) and pre-treated via a 500 Liters sedimentation tank containing different layers of gravel and fine sand and was released into a Vertical Flow Sub-surface Constructed Wetland (CW) with common reed planted on it for actual treatment. The raw and treated greywater were analyzed for irrigation water requirement. Raw Greywater (RGW), Treated Greywater (TGW) and Fresh Water (FW) were used for irrigation in a Randomized Complete Block Design (RCBD) of three treatments and three replicates. This research was conducted in years 2016, 2017 and 2018 dry seasons respectively. It was discovered that both physiological and biochemical properties of treated greywater used as irrigation water have considerable effect on growth parameters of pepper at 5% probability value Findings from this research is useful for farmers that engage in irrigation practice during dry seasons, most importantly, that water scarcity is on the increase due to climate change.

Keywords: Greywater, Irrigation, Constructed wetland, Growth parameters, Physiological properties