Puesta en marcha de reactores ANAMMOX a partir de lodos de depuradoras

There exists a growing need to apply sustainable waste treatment processes, coupled with increased requirements regarding the quality of the effluent. To this end, trials have been conducted employing the ANAMMOX (ANaerobic AMMonia OXidation) process in which the ammonia and the nitrate combine to produce nitrogen gas in the absence of oxygen. The ANAMMOX biomass was developed and enriched in the laboratory by a sequential batch reactor (SBR) fed with a mixture of urban sewage plant sludge. A high nitrogen elimination rate (82%) was achieved within two months treating loads of up to 1.4 g N/(L_d), corresponding to feed nitrogen concentrations of 0.5 g N-NO₂-/L y 0.4 g N-NH₄⁺/L.