The SWAB technology is recommended for decentralized plants with varying capacities of 5 m3/day to 8-10 MLD. It is a special constructed wetland for the purpose of decentralized wastewater treatment and conservation of fresh water bodies. The system is based on the specific plants, such as Elephant grass (Pennisetumpurpurem), Cattails (Typha sp.), Reeds (Phragmitessp.), Cannaspp. and Yellow flag iris (Irispseudocorus), normally found in natural wetlands with filtration and treatment capability.