The Start-up of the Anammox Process in the Membrane-assisted Bioreactor

ABSTRACT The experiments carried out proved possibility for implementation of deamonification process in membrane-assisted bioreactor. At the temperature above 30°C, dissolved oxygen concentration below 0.8 mg O2/L and at the very low contents of biodegradable organic compounds within 1 month of process operation stable nitrite and ammonia nitrogen concentrations were reached at the levels respectively of 130 mg NO2 N/L and around 60 mg NH4 N/L. At the same time nitrates were not produced in the significant amounts. This allowed to reach total nitrogen removal over 50%. Introduced deamonnification process resulted also in increased pH level in the reactor in comparison to pH noted at the nitrification process in the MBRN what agrees with theories about chemical pathways of Anammox process.