hrmf ar0puot.H0mlaa5tt8)ipFo.tHi0ong.(ta 82shn.eaa0de)t, pH has a direct and indirect (via FNA and free ammonia) effect on the activities of AOB and NOB. During the batch test, the average FNA concentrations in Batch Reactors A (pH = 6.0), B (pH = 7.0), C...