Effects of inorganic carbon limitation on anaerobic ammonium oxidation (anammox) activity

Yuya Kimura, Kazuichi Isaka, Futaba Kazama

doi:10.1016/j.biortech.2010.12.101

Effects of inorganic carbon limitation on anaerobic ammonium oxidation (anammox) activity

DOI Web Site Web Site PubMed 被引用文献4件

書誌事項

公開日: 2011-03

権利情報

https://www.elsevier.com/tdm/userlicense/1.0/

DOI

10.1016/j.biortech.2010.12.101

公開者: Elsevier BV

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説明

Anammox bacteria are chemoautotrophic bacteria that oxidize ammonium with nitrite as the electron acceptor and with CO(2) as the main carbon source. The effects of inorganic carbon (IC) limitation on anammox bacteria were investigated using continuous feeding tests. In this study, a gel carrier with entrapped anammox sludge was used. It was clearly shown that the anammox activity deteriorated with a decrease in the influent IC concentration. The relationship between the influent IC concentration and the anammox activity was analyzed using Michaelis-Menten kinetics, and the apparent K(m) was determined to be 1.2mg-C/L. The activity could be recovered by adding IC to the influent. The consumption ratio of IC to ammonium was not constant and mainly depended on the influent ratio of the IC to ammonium concentrations (inf.IC/inf.NH(4)-N). The results indicated that an inf.IC/inf.NH(4)-N ratio of 0.2 in the anammox reactor was ideal for the anammox process using gel cubes.