Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
683329 | Bioresource Technology | 2009 | 9 Pages |
The goal of this work was to demonstrate the feasibility of treating leachate with high ammonium concentrations using the SBR technology, as a preparative step for the treatment in an anammox reactor. The cycle was based on a step-feed strategy, alternating anoxic and aerobic conditions. Results of the study verified the viability of this process, treating an influent with concentration up to 5000 mg N–NH4+ L−1. An effluent with about 1500–2000 mg N–NH4+ L−1 and 2000–3000 mg N–NO2- L−1 was achieved, presenting a nitrite to ammonium molar ratio close to the 1.32 required by the anammox. Furthermore, taking advantage of the biodegradable organic matter, the operational strategy allowed denitrifying about 200 mg N–NO2- L−1. The extreme operational conditions during the long-term resulted on the selection of a sole AOB phylotype, identified by molecular techniques as Nitrosomonas sp. IWT514.