title: Long term operation of pilot-scale biological nutrient removal process in treating municipal wastewater.
abstract: The performance of a pilot-scale biological nutrient removal process has been evaluated for 336 days, receiving the real municipal wastewater with a flowrate of 6.8m(3)/d. The process incorporated an intermittent aeration reactor for enhancing the effluent quality, and a nitrification reactor packed with the porous polyurethane foam media for supporting the attached-growth of microorganism responsible for nitrification. The observation shows that the process enabled a relatively stable and high performance in both organics and nutrient removals. When the SRT was maintained at 12 days, COD, nitrogen, and phosphorus removals averaged as high as 89% at a loading rate of 0.42-3.95 kg COD/m(3)d (corresponding to average influent concentration of 304 mg COD/L), 76% at the loading rate of 0.03-0.27 kg N/m(3)d (with 37.1mg TN/L on average), and 95% at the loading rate of 0.01-0.07 kg TP/m(3)d (with 5.4 mg TP/L on average), respectively.
authors.affiliation: Department of Environmental Engineering, Seoul National University of Technology, Seoul, Republic of Korea.
authors.forename: Daekeun
authors.initials: D
authors.lastname: Kim
authors.forename: Keum-Yong
authors.initials: KY
authors.lastname: Kim
authors.forename: Hong-Duck
authors.initials: HD
authors.lastname: Ryu
authors.forename: Kyung-Kook
authors.initials: KK
authors.lastname: Min
authors.forename: Sang-Ill
authors.initials: SI
authors.lastname: Lee
mesh_terms: D018441:Biofilms; D019149:Bioreactors; D002947:Cities; D009584:Nitrogen / Q000737:chemistry / Q000302:isolation & purification* / Q000378:metabolism; D010758:Phosphorus / Q000737:chemistry / Q000302:isolation & purification*; D010865:Pilot Projects; D011140:Polyurethanes / Q000737:chemistry; D015203:Reproducibility of Results; D012722:Sewage / Q000737:chemistry; D013997:Time Factors; D014865:Waste Disposal, Fluid / Q000295:instrumentation / Q000379:methods*; D014871:Water Microbiology; D014872:Water Movements; D014874:Water Pollutants, Chemical / Q000032:analysis; D018508:Water Purification / Q000295:instrumentation / Q000379:methods*
chemical_list: D011140:Polyurethanes; D012722:Sewage; D014874:Water Pollutants, Chemical; D010758:Phosphorus; D009584:Nitrogen