出版社：Thai Society of Higher Eduction Institutes on Environment
摘要：Nitrate-contamination in groundwater sources has been globally taken as a crucial issue due tothe effects of nitrate on human health, e.g., methaemoglobinaemia. Various processes have beenapplied for the treatment of contaminated groundwater with nitrate. Hydrogen-based autotrophicdenitrification (hydrogenotrophic denitrification) is an alternative process used for abatement ofthe nitrate-contamination. Although high efficiency on nitrate removal was achieved by formerresearch, it is unclear whether the growth of true denitrifiers is affected by inorganic carbon in whichthis is essential to comprehend the principal cause of nitrite accumulation. This study found thatinorganic carbon had no impact on the nitrate reduction rate whereas the nitrite reduction ratewas improved when a higher amount of inorganic carbon was supplied. Also, using bicarbonate asan inorganic carbon source had a positive effect on the growth and adaptation of true denitrifiersthat can reduce the nitrite accumulation in hydrogen-based denitrification system.
