Potential Reuse of Greywater using constructed wetland:Design and Implementation of Vertical Constructed wetland System: A Case Study

Abstract

In this study, greywater characteristics and treatment possibilities were reviewed using vertical constructed wetlands (VCW) to come up with a schematic of a greywater recycling system designed specifically for non-potable uses. Vertical flow constructed wetland units were designed according to the calculation of Kicked equation, which has been widely used in the research literature. Three types of plants, Canna (Canna indica), Ferns (Matteuccia struthiopteris) and Cattail (Typha latifolia) were used. Retention tank constructed for retaining solid particles in greywater as primary treatment. The experiment was conducted in a Completely Randomized Design (CRD) with three replicates conducted during two months period by using a hydraulic retention time of the system of 24 hours. The quality of the influent and effluent was monitored in two weeks intervals by analyzing water quality parameters namely PO4-3, NO3-, and SO4 3. It can be concluded that the pilot scale VCW’s are feasible for greywater treatment at the domestic level with Cattail as the wetland plant since Cattail dense fibrous root system cause to remove more pollutants from the influent compared to that with this other two types of plants.