Abstract

With the ability to use organic compounds, to rapidly proliferate, and to achieve simultaneous nitrification and denitrification, heterotrophic nitrifying bacteria (HNB) have remarkable potential in wastewater biological nitrogen removal (BNR) engineering fields. This review provides a comprehensive and systematic overview of the current knowledge of HNB in wastewater BNR systems. First, it briefly summarizes the general nitrogen transformation pathway and the physiological-biochemical features of HNB. Subsequently, it highlights the phylogenetic diversity of HNB isolates from wastewater BNR systems and their bioaugmentation applications in wastewater BNR systems. Recent developments in the detection of HNB gene abundance and heterotrophic nitrifying activity in wastewater BNR systems is also discussed extensively. This will improve our fundamental understanding of the contribution of HNB to ammonia oxidization in wastewater BNR systems in the presence of various autotrophic ammonia-oxidizing microorganisms, which is important for the control, improvement, and optimization of wastewater BNR systems.

摘要

具有使用有机化合物，迅速增殖并同时进行硝化和反硝化的能力，异养硝化细菌（HNB）在废水生物脱氮（BNR）工程领域中具有显着潜力。这篇综述提供了废水BNR系统中HNB的当前知识的全面而系统的概述。首先，简要总结了HNB的一般氮转化途径和生理生化特征。随后，它强调了废水BNR系统中HNB分离株的系统发育多样性及其在废水BNR系统中的生物强化应用。还广泛讨论了废水BNR系统中HNB基因丰度和异养硝化活性检测的最新进展。