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Brazilian Journal of Chemical Engineering

versão impressa ISSN 0104-6632


HAN, Yaqiong; ZHANG, Weijiang  e  XU, Jiao. A performance study of simultaneous microbial removal of no and SO2 in a biotrickling-filter under anaerobic condition. Braz. J. Chem. Eng. [online]. 2011, vol.28, n.2, pp.189-196. ISSN 0104-6632.

The behaviors of simultaneous removal of NO and SO2 using the coculture of anaerobic denitrifying bacteria and sulfate reducing bacteria was investigated in a bench-scale biotrickling-filter. When the combined NO/SO2 removal biotrickling-filter was operated at an empty bed residence time of 76 s with 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. A steady-state NO-removal efficiency of around 90% was obtained after 130 days of continuous operation. 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 to starvation than the single denitrifying bacteria in the NO removal biotrickling-filter.

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