title: [Effect of the influent COD and C/N ratio on phosphorus removal of UCT system].
abstract: UCT is deeply influenced by COD and C/N ratios. To check this infection, the UCT system was designed to run at variety of influent COD and C/N ratios. The results show that: when the influent C/N ratio is lower than 15, the high influent concentration of COD increases the proliferation of heterotrophic bacteria and decreases the phenomenon release rate. When the influent C/N ratio is higher than 20, the low influent concentration of TN decreases the proliferation of heterotrophic bacteria, the phenomenon release rate rise with the increase of COD. When the influent concentration of COD is lower than 350 mg/L, the phenomenon of denitrifying phosphorus-uptake is very remarkable. The phenomenon release is remarkable when the influent concentration of COD is higher than 350 mg/L. When the influent concentration of COD is lower than 350 mg/L, the promotion of C/N ratio which in the range of 10-20 is obvious, and the promotion decreases along with the increase of C/N ratio. The removal efficiency of total phosphorus achieve higher than 80% steadily when the influent concentration of COD in the range of 250-450 mg/L even in different influent C/N ratio.
authors.affiliation: Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, China. windy0327@126.com
authors.forename: Yuan
authors.initials: Y
authors.lastname: Zhang
authors.forename: Gu-yuan
authors.initials: GY
authors.lastname: Luo
authors.forename: Xiao-yi
authors.initials: XY
authors.lastname: Xu
authors.forename: Jia
authors.initials: J
authors.lastname: Cao
authors.forename: Wei-qun
authors.initials: WQ
authors.lastname: Shu
mesh_terms: D057919:Biological Oxygen Demand Analysis; D019149:Bioreactors / Q000382:microbiology; D002244:Carbon / Q000737:chemistry*; D009584:Nitrogen / Q000737:chemistry*; D010084:Oxidation-Reduction; D010100:Oxygen / Q000737:chemistry; D010758:Phosphorus / Q000302:isolation & purification*; D014865:Waste Disposal, Fluid / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000302:isolation & purification
chemical_list: D014874:Water Pollutants, Chemical; D010758:Phosphorus; D002244:Carbon; D009584:Nitrogen; D010100:Oxygen