High rate nitrogen removal by ANAMMOX internal circulation reactor (IC) for old landfill leachate treatment

The Nhat Phan, Thi Thanh Van Truong, Nhu Biec Ha, Phuoc Dan Nguyen, Xuan Thanh Bui, Bao Trong Dang, Van Tuan Doan, Joonhong Park, Wenshan Guo, Huu Hao Ngo

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45 Citations (Scopus)


This study aimed to evaluate the performance of a high rate nitrogen removal lab-scale ANAMMOX reactor, namely Internal Circulation (IC) reactor, for old landfill leachate treatment. The reactor was operated with pre-treated leachate from a pilot Partial Nitritation Reactor (PNR) using a high nitrogen loading rate ranging from 2 to 10 kg N m−3 d−1. High rate removal of nitrogen (9.52 ± 1.11 kg N m−3 d−1) was observed at an influent nitrogen concentration of 1500 mg N L−1. The specific ANAMMOX activity was found to be 0.598 ± 0.026 gN2-N gVSS−1 d−1. Analysis of ANAMMOX granules suggested that 0.5–1.0 mm size granular sludge was the dominant group. The results of DNA analysis revealed that Candidatus Kueneniastuttgartiensis was the dominant species (37.45%) in the IC reactor, whereas other species like uncultured Bacteroidetes bacterium only constituted 5.37% in the system, but they were still responsible for removing recalcitrant organic matter.

Original languageEnglish
Pages (from-to)281-288
Number of pages8
JournalBioresource technology
Publication statusPublished - 2017

Bibliographical note

Funding Information:
This research was funded by Vietnam National University Ho Chi Minh City (VNU-HCM) under grant number B2016-20-06. The authors deeply thank the research staff at Yonsei University (Korea) for analysis of the bacterial community. This study has been conducted under the framework of CARE-RESCIF initiative. The authors are also grateful for the research collaboration between VNU-HCM and University of Technology Sydney (UTS).

Publisher Copyright:
© 2017 Elsevier Ltd

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Environmental Engineering
  • Renewable Energy, Sustainability and the Environment
  • Waste Management and Disposal


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