厌氧氨氧化菌
亚硝酸盐
硝酸盐
环境化学
化学
细菌
废水
污水处理
铵
氮气
制浆造纸工业
反硝化
环境科学
环境工程
生物
反硝化细菌
有机化学
工程类
遗传学
作者
C.M. Castro-Barros,Mingsheng Jia,Mark C.M. van Loosdrecht,Eveline I.P. Volcke,Mari K.H. Winkler
标识
DOI:10.1016/j.biortech.2017.02.063
摘要
Anammox bacteria can perform dissimilatory nitrate reduction to ammonium (DNRA) with nitrite as intermediate coupled to the oxidation of volatile fatty acids (VFA). Batch tests with enriched anammox and a co-culture of anammox and heterotrophic bacteria showed the capacity of Candidatus ‘Brocadia fulgida’ to perform the DNRA coupled to the anammox reaction (DNRA-anammox) at a high rate although the culture was not previously adapted to VFA. From thermodynamic calculations it could be stated that low COD/N influent ratios favour the DNRA-anammox transformation over heterotrophic conversions since more free energy is gained. A process scheme is proposed for an innovative nitrogen removal system in which the nitrate produced by nitrite oxidizing bacteria and/or anammox bacteria is converted during DNRA-anammox pathway, resulting in a sustainable nitrogen removal from municipal wastewater while circumventing the troublesome out-selection of nitrite oxidizing bacteria encountered in mainstream applications.
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