How to Improve Wastewater Treatment in Smart City

Improving sanitation in future smart cities required to use a constructing wastewater treatment systems based on a sustainable approach which can minimize environmental problems and facilitates utilization of the resources in wastewater. Constructed Wetlands are considered as one of the natural systems which proved their efficiency to treat wastewater in many areas of the world. Compared to other wastewater treatment technologies, treatment wetlands have low operation and maintenance requirements. The aim of this study is to evaluate the performance of Subsurface-vertical flow constructed wetland system (VFCW) to treat wastewater in Moroccan conditions. To do this, a pilot scale was designed and built to treat domestic wastewater and his performance was investigated. This filter was planted by Chrosopogon zizanioides L. Several water quality parameters including BOD₅, COD, TSS, NH₄⁺, NO₃⁻ and PO₄³⁻ were monitored. This filter showed good performance (≥80%) to remove organic pollution (BOD₅, COD, TSS). Removal rates of ammonium and orthophosphates were about 50% and 70%, respectively. The effluent quality was evaluated in accordance with the standard of the rejection limit value adopted by Morocco.