Monitoring and controlling of deammonification process in pilot-scale IFAS system.

Abstract: In recent years, Anammox process has been investigated extensively. Today is successfully used for treatment of supernatant from dewatering of digested sludge having a high concentration of ammonia nitrogen. Currently, studies are carried out for the application of this system for the main waste water stream, which has a low concentration of ammonium nitrogen. The aim of the study was to find the optimal conditions for the activity of Anammox bacteria at low concentrations of ammonia nitrogen, a constant temperature of 25ºC and changing values of biomass in IFAS system. More than that, an assessment of the ongoing process through chemical analysis, physical parameters observation and verification data collected by the online system. Data from the online system have been revised in order to determine the useful and reliable of relevant devices. Each week once/twice analyses of the chemical parameters through laboratory analysis were performed by using Dr. Hach Lange cuvettes. Physical parameters were measured by portable devices to verify the data collected by the online system. All these activities had been made in each, of the four different, periods of the reactor operation. It is difficult to find optimal conditions for the Anammox bacteria that are susceptible to any change inside the reactor. For the evaluation of the process, after changing the parameters inside the reactor, it is necessary to keep time to adapt to new conditions by bacteria.