Removal of ammonia and phosphate parameters from greywater using Vetiveria zizanioides in subsurface-constructed wetland

Abstract

In urban area in Indonesia, such as Jakarta, it is very common that greywater generated from households run off into drainage system. The greywater that mixed together with rain water will flow onto river. Increasing population means increasing in households as well as greywater generated, that become serious problem when greywater becomes dominant in drainage system. To minimize the pollution from greywater in river stream, it was used the constructed wetland with subsurface system in riverbanks of Ciliwung river. The research was conducted using the vetiver (Vetiveria zizanioides) planted in the subsurface-constructed wetland to decrease the parameter of ammonia and phosphate from greywater. The aim of the research is to determine the removal efficiency of the parameters from greywater using the constructed wetland located in Srengseng Sawah sub district, South Jakarta City. With the residence time of 2 days, the parameter of ammonia could be removed 10% while for phosphate parameter was 30%. To reach the quality standards, it is suggested to add the pre-treatment of aeration for the wetland.