Improving stability and nitrogen removal performance of pilot-scale autotrophic process for mature landfill leachate treatment utilizing in-situ organics

Yonggan Li; Zhenguo Chen; Songwei Zhou; Junhao Fan; Linxiang Huang; Zexi Deng; Chuchu Zhang; Xiaojun Wang

doi:10.1016/j.biortech.2023.129118

Improving stability and nitrogen removal performance of pilot-scale autotrophic process for mature landfill leachate treatment utilizing in-situ organics

Bioresour Technol. 2023 Aug:381:129118. doi: 10.1016/j.biortech.2023.129118. Epub 2023 May 2.

Authors

Yonggan Li¹, Zhenguo Chen², Songwei Zhou³, Junhao Fan³, Linxiang Huang¹, Zexi Deng¹, Chuchu Zhang¹, Xiaojun Wang⁴

Affiliations

¹ School of Environment and Energy, South China University of Technology, Guangzhou 510006, China; The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, China.
² School of Environment, South China Normal University, Guangzhou 510006, China.
³ Hua an Biotech Co., Ltd., Foshan 528300, China.
⁴ School of Environment and Energy, South China University of Technology, Guangzhou 510006, China; The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, China; Hua an Biotech Co., Ltd., Foshan 528300, China. Electronic address: cexjwang@scut.edu.cn.

PMID: 37141999
DOI: 10.1016/j.biortech.2023.129118

Abstract

This study established a stable and efficient pilot-scale denitrification (DN) and partial nitritation (PN) combined with autotrophic nitrogen removal process for mature landfill leachate treatment. A total inorganic nitrogen removal efficiency (TINRE) of 95.3% was achieved without any external carbon source input, including 17.1%, 1.0% and 77.2% of nitrogen removal contributed by the DN, PN and autotrophic processes, respectively. ANAMMOX genus, Ca_Anammoxoglobus (19.4%) was dominant in autotrophic reactor. Moreover, denitrifying bacteria could utilize in-situ organics, including poorly degradable organics, to enhance the nitrogen removal performance of autotrophic process, contributing 3.4% of TINRE. This study provides new insights for the economical, low-carbon, and efficient treatment of mature landfill leachate.

Keywords: ANAMMOX; Enhanced nitrogen removal; In-situ carbon source; Microbial community structure.

MeSH terms

Bioreactors
Denitrification*
Nitrogen
Oxidation-Reduction
Sewage
Water Pollutants, Chemical*

Substances

Water Pollutants, Chemical
Nitrogen
Sewage