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Updated: Dec 20, 2025

A Novel Bioreactor for High Density Cultivation of Diverse Microbial Communities
Published on: December 25, 2015
Process performance and anammox community diversity in a deammonification reactor under progressive nitrogen loading
Angélica Chini1, Camila Ester Hollas1, Alice Chiapetti Bolsan2
1Western Paraná State University, 85819-110 Cascavel, PR, Brazil.
Abstract:
The performance of a deammonification reactor fed with increasing nitrogen loading rates (NLR) was evaluated. The digestate from a continuous stirred tank reactor (CSTR) treating sludge from a swine production unit was diluted to provide different ammonia concentrations. The biomass samples from the end of each experimental phase were analyzed for microorganism community evaluation. The results proved that deammonification system supported a NLR up to 3.27 ± 0.13 g N L-1 d-1 with nitrogen removal efficiency of 83%. The specific ammonia consumption rate (µNH3-N) did not decrease up to this NLR proving the stability of reactor performance. Anammox bacteria genus shifted along the experiment and at the end the predominant anammox bacteria found in the reactor was candidatus Brocadia. Finally, it was proved that a deammonification reactor for nitrogen removal from CSTR digestate could be easily controlled only by monitoring pH and dissolved oxygen.
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