**Author details**

Ivan Zhu Evoqua Water Technologies, LLC, Pittsburgh, PA, USA

\*Address all correspondence to: ivan.zhu@evoqua.com

© 2023 The Author(s). Licensee IntechOpen. This chapter is distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

*Introductory Chapter: Ammonia Removal and Recovery DOI: http://dx.doi.org/10.5772/intechopen.113948*
