Characteristics of cells proliferation and mass transfer of immobilized nitrifiers in a nitrification process
Characteristics of cells proliferation and substrate transfer of immobilized nitrifiers during cultivation was investigated. The respiratory rate, nitrification rate and biomass in the pellets showed a similar tendency of slow increase when cultivation was over. The activity of unit biomass decreased for the difficult oxygen transfer into the compact microcolonies. De also went degressive gradually along with time because the diffusivities in the microcolonies near the pellets surface are lower than that in the support phase. SEM and TEM pictures reveal that the microorganisms grow like a biofilm on the pellets surface, while expand as colonies inside the pellets. μi obtained via cells balance in the reactor decreased gradually, would reach a steady state that μi approximates 0.
immobilized cells proliferation mass transfer diffusivity nitrification
Li Zhirong Zhang Zhenjia Zhang Zhi
School of Environmental Science & Engineering Shanghai Jiaotong University Shanghai, China
国际会议
上海
英文
3371-3374
2008-05-16（万方平台首次上网日期，不代表论文的发表时间）