title: [Pilot-scale study on treatment of municipal sewage by moving-bed biofilm reactor with the hydrophobically modified polyurethane cubes as biofilm carriers].
abstract: The carrier is the key influencers in moving bed biofilm reactor( MBBR), in this paper, a pilot scale apparatus was set up for treating municipal wastewater using modified cubic polyurethane carriers. For MBBR, the capacity of 3-3.5 t x d(-1), hydraulic residence time of 7-8 h, under the condition of continuous feed water (COD:140-280 mg x L(-1), NH4+ -N:30-50 mg x L(-1), TN: 45-65 mg x L(-1), TP:2.5-4.0 mg x L(-1)), the speed of biofilm formation and removal effects of COD, nitrogen and phosphorus were studied. After 140 days, the results showed that the formation of biofilm on the carrier was very quickly under 24-28 degrees C, and obtained stable treatment effect about 6 days. The COD, NH4+ -N, TN, TP average removal rates were 70%, 97%, 70%, 39%, respectively. As the temperature gradually decreased to about 12 degrees C, a high NH4+ -N removal rate (97%) could still be maintained, which indicating that the modified carrier can be achieved a high nitrification rate at low temperature.
authors.affiliation: College of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou 730050, China. xiaofenling28@126.com
authors.forename: Yu-Xiao
authors.initials: YX
authors.lastname: Wang
authors.forename: Xiu-Qin
authors.initials: XQ
authors.lastname: Kong
authors.forename: Quan
authors.initials: Q
authors.lastname: Feng
authors.forename: Hai-Tao
authors.initials: HT
authors.lastname: Lu
authors.forename: De-Yuan
authors.initials: DY
authors.lastname: Wang
authors.forename: Li-Ming
authors.initials: LM
authors.lastname: Tang
authors.forename: Xin-Hui
authors.initials: XH
authors.lastname: Xing
mesh_terms: D064751:Ammonium Compounds / Q000302:isolation & purification* / Q000378:metabolism; D018441:Biofilms; D057919:Biological Oxygen Demand Analysis; D019149:Bioreactors / Q000382:microbiology; D002947:Cities; D009584:Nitrogen / Q000302:isolation & purification* / Q000378:metabolism; D010100:Oxygen / Q000737:chemistry / Q000302:isolation & purification; D010865:Pilot Projects; D011140:Polyurethanes / Q000737:chemistry*; D012722:Sewage / Q000737:chemistry; D014865:Waste Disposal, Fluid / Q000379:methods*; D062065:Wastewater / Q000737:chemistry
chemical_list: D064751:Ammonium Compounds; D009584:Nitrogen; D010100:Oxygen; D011140:Polyurethanes; D012722:Sewage; D062065:Wastewater