Sustainable treatment of nitrate-containing wastewater by an autotrophic hydrogen-oxidizing bacterium.

Bacteria are key denitrifiers in the reduction of nitrate (NO -N), which is a contaminant in wastewater treatment plants (WWTPs). They can also produce carbon dioxide (CO) and nitrous oxide (NO). In this study, the autotrophic hydrogen-oxidizing bacterium sp TH20 was isolated for sustainable treatment of NO -N in wastewater.

Highly efficient ammonium removal through nitrogen assimilation by a hydrogen-oxidizing bacterium, Ideonella sp. TH17.

Ideonella sp. TH17, an autotrophic hydrogen-oxidizing bacterium (HOB), was successfully enriched and isolated from activated sludge in a domestic wastewater treatment plant (WWTP). Batch experiments were conducted to identify the cell growth and ammonium (NH-N) removal, and to verify the pathways of nitrogen utilization under different conditions.