Thauera sp. in Hydrogen-Based Denitrification: Effects of Plentiful Bicarbonate Supplementation on Powerful Nitrite Reducer

Nitrite accumulation in hydrogen-based denitrification (HD) has been reported as a difficulty for achieving complete denitrification. Thauera sp. found the dominant bacterial species HD previously when using plentiful amount of HCO3−. This present study was successful isolating Pseudomonas sp., Dietzia Pannonibacter Halomonas Bacillus and These isolated strains were selected investigating nitrogen removal performance under HCO3− condition. Only capable removing NO2− where specific rate (36.02 ± 5.66 mgN gVSS−1 day−1) 9 times quicker than that (3.94 0.80 day−1). The strain then tested at different amounts. As result, had no ability to function both NO3− removals deficit provided evidence on role necessity bicarbonate process enhance its efficiency simultaneously reduce operational cost especially hydrogen.