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Influence of substrates on nitrogen removal performance and microbiology of anaerobic ammonium oxidation by operating two UASB reactors fed with different substrate levels by Chong-Jian Tang; Ping Zheng; Bao-Lan Hu; Jian-Wei Chen; Cai-Hua Wang is a Environmental Science article available to read on EtoBox.

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Both ammonium and nitrite act as substrates as well as potential inhibitors of anoxic ammoniumoxidizing (Anammox) bacteria. To satisfy demand of substrates for Anammox bacteria and to prevent substrate inhibition simultaneously; two strategies, namely high or low substrate concentration, were carefully compared in the operation of two Anammox upflow anaerobic sludge blanket (UASB) reactors fed with different substrate concentrations. The reactor working at relatively low influent substrate concentration (NO 2 --N, 240 mg-N L -1 ) was shown to avoid the inhibition caused by nitrite and free ammonia. Using the strategy of low substrate concentration, a record super high volumetric nitrogen removal rate of 45.24 kg-N m -3 day -1 was noted after the operation of 230 days. To our knowledge, such a high value has not been reported previously. The evidence from transmission electron microscopy (TEM) showed that the morphology and ultrastructure of the Anammox cells in both the reactor enrichments was different.

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Author

Chong-Jian Tang; Ping Zheng; Bao-Lan Hu; Jian-Wei Chen; Cai-Hua Wang

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0304-3894)

Published

2010

Language

EN

Field

Environmental Science (Physical Sciences)