One-stage deammonification start-up control using ion-selective electrodes (ISE) sensor

Abstract

Dynamic development of side-stream ammonia-rich streams treatment technologies creates need of new methods of control techniques. So far, most of available technologies are based on relatively simple sensors, such as pH probes. This article presents the results of an ion selective electrode used for controlling a one-stage deammonification process in the start-up period. Sensor applicability under alternating aerobic/anaerobic conditions and large fluctuations of measured substances concentrations was investigated. ISE probe was also used to verify Anammox bacteria response on elevated dissolved oxygen exposition at the beginning of the anaerobic phases preceded by aerobic phases.