Denitrification with biogas consisting of approximately 60% methane was tested over one year in three types of lab-scale reactors. Denitrification of sanitary landfill leachate with biogas as a sole carbon source was found to be possible. Denitrification rates from 60 mg NO3–N/l. d with an activated sludge reactor, 150 mg NO3–N/l. d with a trickling filter and 550 mg NO3–N/l.d with a fluidized bed reactor were obtained. The oxygen concentration played a significant role in process optimization. Not only high concentrations of oxygen in the liquid medium but also low oxygen concentrations in the aeration gas inhibited denitrification.
Denitrification with Biogas as External Carbon Source
M. Werner, R. Kayser; Denitrification with Biogas as External Carbon Source. Water Sci Technol 1 February 1991; 23 (4-6): 701–708. doi: https://doi.org/10.2166/wst.1991.0520
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