Towards advanced nitrogen removal and optimal energy recovery from leachate: A critical review of anammox-based processes

Jiongjiong Ye, Jianyong Liu, Min Ye, Xiao Ma, Yu You Li

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)

Abstract

Anaerobic ammonium oxidation (anammox), a promising technology for bio-nitrogen removal, has been a research hotspot in the field of leachate treatment. However, the inhibitory effect of organic matter and high-strength nitrogen on anammox bacteria and the limitation of the theoretical total nitrogen removal efficiency of anammox (<90%) are obstacles to its wider application. The mechanisms of the inhibitory effects of organic matter, ammonium, and nitrite on anammox bacteria, and the corresponding control strategies are summaries. The anammox-based processes developed for advanced nitrogen removal (ANR) in recent years, including anammox-based heterotrophic denitrification, anammox-based partial denitrification, and anammox-based constructed wetlands are systematically discussed. An integrated anaerobic system of simultaneous denitrification and methanogenesis (anaerobic membrane bioreactor) + anammox-based processes was proposed for the ANR and optimal energy recovery from leachate. This process showed a 16% increase in biogas yield, a 64% decrease in aeration energy consumption, and the decrease in the external carbon source is expected to be 100% compared to conventional leachate treatment processes such as anoxic/oxic-membrane bioreactors. Finally, a few research perspectives on leachate treatment using anammox-based processes are reviewed. The conclusions drawn from the studies presented herein provide guidance for further research and engineering applications in the field of leachate treatment. (Figure presented.) Highlights AnMBR pretreatment is proposed for energy recovery and elimination of inhibition of anammox bacteria by organics. Anammox-based heterotrophic denitrification, partial denitrification, and anammox-based constructed wetlands are discussed for ANR. SDM is proposed for ANR from leachate via anammox effluent recirculation. An SDM(AnMBR)+anammox based process is proposed for energy saving and recovery.

Original languageEnglish
Pages (from-to)612-653
Number of pages42
JournalCritical Reviews in Environmental Science and Technology
Volume50
Issue number6
DOIs
Publication statusPublished - 2020 Mar 18

Keywords

  • Leachate
  • advanced nitrogen removal
  • anammox
  • heterotrophic denitrification
  • partial denitrification
  • simultaneous denitrification and methanogenesis (SDM)

ASJC Scopus subject areas

  • Environmental Engineering
  • Water Science and Technology
  • Waste Management and Disposal
  • Pollution

Fingerprint

Dive into the research topics of 'Towards advanced nitrogen removal and optimal energy recovery from leachate: A critical review of anammox-based processes'. Together they form a unique fingerprint.

Cite this