Hydrogenotrophic denitrification in a packed bed reactor: Effects of hydrogen-to-water flow rate ratio
- Hydrogenotrophic denitrification in a packed bed reactor: Effects of hydrogen-to-water flow rate ratio
- J.W. Lee; K.H. Lee; K.Y. Park; 맹승규
- Hydrogenotrophic denitrification; Packed bed reactor (PBR); Hydrogen flow rate; Hydraulic retention time (HRT)
- Issue Date
- Bioresource technology : biomass, bioenergy, biowastes, conversion technologies, biotransformations, production technologies
- VOL 101, NO 11, 3940-3946
- Hydrogen dissolution and hydrogenotrophic denitrification performance were investigated in a lab-scale
packed bed reactor (PBR) by varying the hydrogen flow rate and hydraulic retention time (HRT). The denitrification
performance was enhanced by increasing the hydrogen flow rate and HRT as a result of high
dissolved hydrogen concentration (0.39 mg/L) and utilization efficiencies (79%). In this study, the hydrogen-
to-water flow rate ratio (Qg/Qw) was found to be a new operating factor representing the two parameters
of hydrogen flow rate and HRT. Hydrogen dissolution and denitrification efficiency were nonlinearly
and linearly correlated with the Qg/Qw, respectively. Based on its excellent linear correlation with denitrification
efficiency, Qg/Qw should be greater than 2.3 to meet the WHO’s guideline of nitrate nitrogen for
drinking water. This study demonstrates that Qg/Qw is a simple and robust factor to optimize hydrogensparged
bioreactors for hydrogenotrophic denitrification.
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