Comparative study of the use of pure oxygen and air in the nitrification of a MBR system used for wastewater treatment

► Behavior of the biological system in different MLSS, HRT and temperature. ► Kinetic coefficients have been changed with different MLSS and HRT in MBR system. ► Kinetic coefficients have been changed when oxygen or air were used. ► The nitrogen removal was improved when oxygen was used instead of air.