The track, hotspot and frontier of anammox technology in wastewater treatment 2001–2022

Anaerobic ammonia oxidation (anammox) technology is gaining traction as a promising solution for wastewater denitrification due to its ability to reduce investment, and minimize operational costs and sludge production. As a result, it has become a hot research topic of wastewater treatment, with a growing body of literature exploring its potential applications. However, despite the increasing interest in this field, there is a lack of comprehensive analysis that provides a clear overview of the development context and quantitative research on the overall trends of anammox technology in wastewater treatment. To manage this gap, this article conducted a systematic bibliometric analysis of global application research of anammox technology in wastewater treatment using VOSviewer, CiteSpace, and Bibliometric for the core collection database of Web of Science. The study included drawing a collaborative map of countries, institutions, and researchers to display the distribution of research forces and scientific research cooperation in this field. Moreover, the article employed software co-occurrence analysis to obtain the hot scientific fields in anammox wastewater treatment. Finally, valuable insights into the future direction of research in this field were provided through the use of a keyword co-occurrence network atlas and literature co-citation network atlas, which were employed to analyze research hotspots, research frontiers, and development trends.