Kinetic analysis of simultaneous denitrification and biomineralization of novel Acinetobacter sp. CN86

• Strain CN86 could perform simultaneous denitrification and biomineralization.
• Exponential decay equation was used for the matching of kinetic processes on denitrification and biomineralization.
• Strain CN86 had a strong ability in the simultaneous removal of nitrate and hardness in the groundwater experiments.

A novel aerobic denitrification and biomineralization strain CN86 was isolated from the Qu Jiang artificial lake. Based on phylogenetic characteristics, the isolated strain was identified as Acinetobacter species. Strain CN86 was confirmed to have the ability to perform simultaneous denitrification and biomineralization. Exponential decay equation was used for the matching of kinetic processes on denitrification and biomineralization. A highest nitrate removal rate was achieved at the pH 7.0, organic concentration of 1.5 g/L and temperature of 30 °C. An optimal hardness removal rate was obtained at the pH 9.0, organic concentration of 2.0 g/L and temperature of 30 °C. Strain CN86 is a suitable candidate for the simultaneous removal of nitrate and hardness in groundwater treatment.