Evaluate the Efficiencies of Reduction Techniques on Biological Oxygen Demand and Total Suspended Solid of Domestic Waste by Comparative Performance Index Method

Population growth and limitations of domestic wastewater treatment plant cause pollution of surface water, especially river water. Application of constructed wetlands, biofilter, wastewater garden, and activated sludge to treat domestic wastewater was conducted to know the effectiveness in reducing of Biological Oxygen Demand (BOD) and Total Suspended Solid (TSS). Comparative Performance Index (CPI) method had been used to find out the best technology that could be implemented for reduction efficiency of BOD and TSS from domestic wastewater. The results showed that constructed wetlands are the most effective technologies and applicable to the reduction of BOD and TSS, followed by wastewater garden, the biofilter and activated sludge. The effectiveness of constructed wetlands performance was evaluated which indicated good mean reduction efficiency: BOD (50 – 76%) and TSS (53 – 78%).