Evaluation of pilot-scale modified A2O processes for the removal of nitrogen compounds from sewage.
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.
Lim
Eun-Tae
ET
Taerim Industry Co., Ltd., Jeonnam 520-340, South Korea.
Jeong
Gwi-Taek
GT
Bhang
Sung-Hun
SH
Park
Seok-Hwan
SH
Park
Don-Hee
DH
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*
D007287:Inorganic Chemicals; D017672:Nitrogen Compounds; D012722:Sewage; D009584:Nitrogen; D010100:Oxygen