FEIS installed modified upflow anaerobic sludge bed (UASB), through which organic pollutants are reduced to methane and CO₂ by anaerobic microorganisms. UASB lowers the concentration of organic chemicals in wastewater, and helps increase recycled wastewater. In addition, UASB requires less energy, produces less sludge and captures methane for reuse. FEIS is in the process of using UASB to improve the performance of anaerobic treatment and replace the aerobic septic system. The project is scheduled to complete in 2020.