Authors : Kanty Driantami and Setyo S. Moersidik
Abstract: High concentration of NH3-N in wastewater discharges from sewage treatment plant can cause eutrophication of the surface water that has the negative impacts for aquatic ecosystems. Membrane-Aerated Biofilm Reactor (MABR) has been proposed as a wastewater technology to reduce NH3-N concentration in domestic wastewater. This study observed the performance of NH3-N removal in domestic wastewater using MABR. Domestic wastewater contains concentration of NH3-N from 73-104.8 mg/L (0.12-0.24 kg NH3-N/m3.d) and COD from 332-468 mg/L (0.56-1.05 kg COD/m3d). MABR was supplied by oxygen at the pressure of 20 kPa and study performed for 3 Hydraulic loading rate (HRT) variations which were 8, 10 and 12 h. After 33 days of running, the result showed COD/N ratio were about 3.9-5.72 with maximum efficiency of COD and NH3-N removal occurred when HRT 12 h, reached 88 and 89.58%, respectively. This indicated that NH3-N could remove by MABRat low COD/N ratio. Furthermore, autotrophs bacteria that responsible for oxidized NH3-N to NO2– and NO3– have slower growth rates compared with heterotrophs bacteria. Thus, longer HRT provided benefit for nitrification process and high NH3-N removal efficiency has been achieved.
Kanty Driantami and Setyo S. Moersidik, 2017. The Performance of Ammonia Nitrogen Removal by using Membrane-Aerated Biofilm Reactor as Domestic Wastewater Treatment. Journal of Engineering and Applied Sciences, 12: 4759-4764.