Author/Authors :
Zhang، W نويسنده School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China , , Xu، J نويسنده School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China , , Han، Y نويسنده School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China ,
Abstract :
Behaviors of simultaneous removal of NO and SO2
using the coculture of anaerobic denitrifying
bacteria and sulfate reducing bacteria were investigated in a bench-scale biotrickling-filter. Approximate 20
days were required to use the landfill leachate as the microbial seed to develop the biofilm on the surface of
packing material. When the combined NO/SO2
removal biotrickling-filter was operated at an empty bed
residence time (EBRT) of 76 s and the NO and SO2
feed concentrations of 2 and 2 g/m3
respectively, the SO2
removal efficiency was always above 95%, while NO removal exhibited an evident periodicity of 5-6 days for
the initial 60 days after the attachment phase and then a steady-state NO-removal efficiency of around 90%
was obtained after 130 days of continuous operation. Contrast experimental results indicated that the coculture
in the combined NO/SO2
removal biotrickling-filter showed a higher resistance to shock NO-loadings and a
better tolerance of starvation than the single denitrifying bacteria in the NO removal biotrickling-filter.
