Combining Electrochemical Nitrate Reduction and Anammox for Treatment of Nitrate-Rich Wastewater: A Short Review

Authors

Xinyi Zou, Suzhou University of Science and Technology
Chongjun Chen, Suzhou University of Science and Technology and Jiangsu Collaborative Innovation Center of Technology and Material of Water Treatment
Changhong Wang, Jiangsu Collaborative Innovation Center of Technology and Material of Water Treatment and Suzhou University of Science and Technology
Qun Zhang, Suzhou University of Science and Technology
Zhuowei Yu, Ecolord (Suzhou) Environment Protect Technology Co. Ltd.
Haiping Wu, Ecolord (Suzhou) Environment Protect Technology Co. Ltd.
Chao Zhuo, Ecolord (Suzhou) Environment Protect Technology Co. Ltd.
Tian C. Zhang, University of Nebraska-LincolnFollow

Date of this Version

2021

Citation

Science of the Total Environment 800 (2021), 149645.

doi: 10.1016/j.scitotenv.2021.149645

Comments

Copyright © 2021 Elsevier B.V. Used by permission.

Abstract

Treatment of nitrate-rich wastewater is important but challenging for the conventional biological denitrification process. Here, we propose combining the electrochemical reduction and anaerobic ammonium oxidation (anammox) processes together for treatment of nitrate-rich wastewater. This article reviews the mechanism and current research status of electrochemical reduction of nitrate to ammonium as well as the mechanism and applicability of the anammox process. This article discusses the principles, superiorities, and challenges of this combined process. The feasibility of the combined process depends on the efficiency of electrochemical nitrate reduction to ammonium and the conditions in the anammox process to use the reduced ammonium as the substrate to achieve deep nitrogen removal. The article provides a feasible strategy for using the electrochemical reduction and anammox combined process to treat nitrate-rich wastewater.