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Modeling a granule‐based anaerobic ammonium oxidizing (ANAMMOX) process

2009; Wiley; Volume: 103; Issue: 3 Linguagem: Inglês

10.1002/bit.22279

1097-0290

Bing‐Jie Ni, You‐Peng Chen, Shaoyang Liu, Fang Fang, Wen‐Ming Xie, Han‐Qing Yu,

Microbial Fuel Cells and Bioremediation

Abstract A mathematical model was developed to describe the anaerobic ammonium oxidation (ANAMMOX) process in a granular upflow anaerobic sludge blanket (UASB) reactor. ANAMMOX granules were cultivated in the UASB reactor by seeding aerobic granules. The granule‐based reactor had a great N‐loading resistant capacity. The model simulation results on the 1‐year reactor performance matched the experimental data well. The yield coefficient for the growth and the decay rate coefficient of the ANAMMOX granules were estimated to be 0.164 g COD g −1 N and 0.00016 h −1 , respectively. With this model, the effects of process parameters on the reactor performance were evaluated. Results showed that the optimum granule diameter for the maximum N‐removal should be between 1.0 and 1.3 mm and that the optimum N loading rate should be 0.8 kg N m −3 d −1 . In addition, the substrate micro‐profiles in the ANAMMOX granules were measured with a microelectrode to explore the diffusion dynamics within the granules, and the measured profiles matched the predicted results well. Biotechnol. Bioeng. 2009;103: 490–499. © 2009 Wiley Periodicals, Inc.