title: [Effect of different volume loading of aerobic/anaerobic zone on nitrogen and phosphorus removal by biofilm and granular sludge coupling process].
abstract: The effect of different aerobic/anaerobic zone volume loading on nitrogen and phosphorus removal by biological film and granular coupling process was investigated using a self-designed Biofilm/Granular sludge coupling reactor. Three operating modes were conducted in the experiment. In operating mode I ,the volume of aerobic zone was 9. 66 L, and the volume of anaerobic zone was 15. 34 L. In operating mode II , the volume of aerobic zone was 12. 56 L, and the volume of anaerobic zone was 12. 44 L. In operating mode III , the volume of aerobic zone was 15.42 L, and the volume of anaerobic zone was 9.58 L. Three operating modes expressed different volume loading of the reactor because of different aerobic/anaerobic zone. The results showed that the performance of ammonia nitrogen and phosphorus removal was a bit poor in operating mode I , the effluent nitrate nitrogen was higher in operating mode III compared with other modes, which brought the total nitrogen removal efficiency lower. The operating mode II was optimal for nitrogen and phosphorus removal. In operating mode II , the ammonia nitrogen removal efficiency was about 80. 63% , the volume loading rate of nitrogen removal was about 150. 27 g(m3 d)-1, and the COD removal efficiency was higher than 83.24%; the amounts of phosphorus release and uptake under anaerobic conditions were 7. 23 mg L-1 and 11. 93 mg L-1.
authors: Hang
authors: H
authors: Yin
authors: Chang
authors: C
authors: Liu
authors: Hui
authors: H
authors: Gao
authors: Da-Wen
authors: DW
authors: Gao
mesh_terms: D018441:Biofilms; D019149:Bioreactors / Q000382:microbiology*; D009584:Nitrogen / Q000737:chemistry*; D010758:Phosphorus / Q000737:chemistry*; D012722:Sewage / Q000737:chemistry*; D014865:Waste Disposal, Fluid / Q000379:methods*
chemical_list: D012722:Sewage; D010758:Phosphorus; D009584:Nitrogen