title: Evaluation of pilot-scale modified A2O processes for the removal of nitrogen compounds from sewage.
abstract: In this study, pilot-scale experiments for the removal of nitrogen from sewage obtained from a county Y sewer system were performed using modified A(2)O processes. Using this approach, the total amount of nitrogen discharged during denitrification of the influent was average 38.6 mg/L and a level of average 10.8 mg/L was maintained throughout the denitrification process, which resulted in an average removal efficiency that was greater than 72%. The nitrogen components in the effluent water consisted of 22% ammonia nitrogen, 6% nitrite nitrogen and 72% nitrate nitrogen, reaching a nitrification efficiency of 94%. In conclusion, since these advanced treatment methods, which involve modified A(2)O processes, were successfully employed to remove nitrogen from sewage discharge, they hold promise for wide spread use by treatment plants.
authors: Taerim Industry Co., Ltd., Jeonnam 520-340, South Korea.
authors: Eun-Tae
authors: ET
authors: Lim
authors: Gwi-Taek
authors: GT
authors: Jeong
authors: Sung-Hun
authors: SH
authors: Bhang
authors: Seok-Hwan
authors: SH
authors: Park
authors: Don-Hee
authors: DH
authors: Park
mesh_terms: D001673:Biodegradation, Environmental; D018914:Cells, Immobilized / Q000378:metabolism; D006863:Hydrogen-Ion Concentration; D007287:Inorganic Chemicals / Q000032:analysis; D009584:Nitrogen / Q000302:isolation & purification; D017672:Nitrogen Compounds / Q000302:isolation & purification*; D010100:Oxygen / Q000302:isolation & purification; D010865:Pilot Projects; D012722:Sewage / Q000737:chemistry* / Q000382:microbiology; D018508:Water Purification / Q000379:methods*
chemical_list: D007287:Inorganic Chemicals; D017672:Nitrogen Compounds; D012722:Sewage; D009584:Nitrogen; D010100:Oxygen