title: [Influence of controlling factors on partial nitrification performance in membrane bioreactor].
abstract: A membrane bioreactor (MBR) was developed successfully to carry out partial nitrification process. Temperature, and dissolved oxygen (DO) were investigated as the factors which may affect the results. It has been proved that the optimal operational parameters were at 35 degrees C, ammonia loading 0.45 kg x (m3 x d)(-1) and < 0.5 mg/L, respectively, with the effluent NO3(-) -N concentration below 20 mg x L(-1) and rho(NO2(-) -N)/rho(NH4(+) -N) ratio being close to 1.0. It is not observed severe membrane fouling during all the experiment. Fluorescence in situ hybridization analysis indicated that aerobic ammonium oxidizers were the dominant population, and nitrite-oxidizing bacteria were inhibited. The microbiological community analysis further provided the necessary biological information for the realization of partial nitrification.
authors.affiliation: Key Laboratory of Industrial Ecology and Environmental Engineering of Ministry of Education, School of Environmental and Biological Science and Technology, Dalian University of Technology, Dalian 116024, China. nitritation@yahoo.cn
authors.forename: Yuan
authors.initials: Y
authors.lastname: Xue
authors.forename: Feng-Lin
authors.initials: FL
authors.lastname: Yang
authors.forename: Si-Tong
authors.initials: ST
authors.lastname: Liu
authors.forename: Zhi-Min
authors.initials: ZM
authors.lastname: Fu
authors.forename: Shao-Wei
authors.initials: SW
authors.lastname: Hu
mesh_terms: D000332:Aerobiosis; D019149:Bioreactors / Q000382:microbiology*; D008567:Membranes, Artificial; D009573:Nitrites / Q000302:isolation & purification / Q000378:metabolism*; D009584:Nitrogen / Q000378:metabolism; D010100:Oxygen / Q000378:metabolism; D000644:Quaternary Ammonium Compounds / Q000378:metabolism*; D012722:Sewage / Q000382:microbiology; D013696:Temperature; D014865:Waste Disposal, Fluid / Q000379:methods*
chemical_list: D008567:Membranes, Artificial; D009573:Nitrites; D000644:Quaternary Ammonium Compounds; D012722:Sewage; D009584:Nitrogen; D010100:Oxygen