The effect of activated sludge treatment and catalytic ozonation on high concentration of ammonia nitrogen removal from landfill leachate

Yuchen Yuan; Jiadong Liu; Bo Gao; Mika Sillanpää; Saleh Al-Farraj

doi:10.1016/j.biortech.2022.127668

The effect of activated sludge treatment and catalytic ozonation on high concentration of ammonia nitrogen removal from landfill leachate

Bioresour Technol. 2022 Oct:361:127668. doi: 10.1016/j.biortech.2022.127668. Epub 2022 Jul 22.

Authors

Yuchen Yuan¹, Jiadong Liu², Bo Gao¹, Mika Sillanpää³, Saleh Al-Farraj⁴

Affiliations

¹ Key Laboratory of Northwest Water Resource, Environment and Ecology, MOE, Xi'an University of Architecture and Technology, Xi'an 710055, China; Key Laboratory of Membrane Separation of Shaanxi Province, Xi'an University of Architecture and Technology, Xi'an 710055, China.
² Key Laboratory of Northwest Water Resource, Environment and Ecology, MOE, Xi'an University of Architecture and Technology, Xi'an 710055, China; Key Laboratory of Membrane Separation of Shaanxi Province, Xi'an University of Architecture and Technology, Xi'an 710055, China. Electronic address: liujiadong@xauat.edu.cn.
³ Department of Chemical Engineering, School of Mining, Metallurgy and Chemical Engineering, University of Johannesburg, P. O. Box 17011, Doornfontein 2028, South Africa; Chemistry Department, College of Science, King Saud University, Riyadh 11451, Saudi Arabia; Zhejiang Rongsheng Environmental Protection Paper Co. LTD, NO. 588 East Zhennan Road, Pinghu Economic Development Zone, Zhejiang 314213, China; Department of Civil Engineering, University Centre for Research & Development, Chandigarh University, Gharuan, Mohali, Punjab, India; International Research Centre of Nanotechnology for Himalayan Sustainability (IRCNHS), Shoolini University, Solan 173212, Himachal Pradesh, India.
⁴ Department of Zoology, College of Science, King Saud University, Riyadh, Saudi Arabia.

PMID: 35878770
DOI: 10.1016/j.biortech.2022.127668

Abstract

This study adopted the combination of activated sludge treatment and catalytic ozonation technology to efficiently remove the high concentration of ammonia nitrogen from landfill leachate. Through optimizing the parameters continuously, the COD, NH₄⁺-N, UV₂₅₄ and colority respectively descended to 417.75 ± 6.72 mg/L, 9.77 mg/L, 1.98 ± 0.04 and 40 times, and 3D fluorescence also reduced significantly within 14 days. Target genes of AOB-amoA, nxrA, napA, nirS and nosZ analysis indicated that ammonia-oxidizing bacteria, nitrated bacteria, and denitrifying bacteria played a key role on nitrogen removal, aerobic denitrifying bacteria was dominated especially. The nitrogen removal process was as follows: catalytic ozonation converted nitrogen-containing organic matter into NH₄⁺-N, then NH₄⁺-N was converted into NO₂^--N and NO₃^--N with the action of ammonia oxidation, nitrification and catalytic ozonation. Finally, the denitrification microorganisms transformed NO₃^--N or NO₂^--N to N₂. Therefore, this coupled process realized the nitrogen removal effectively from landfill leachate.

Keywords: Aerobic denitrifying; Biochemical method; Catalytic ozonation; Landfill leachate; Nitrogen removal.

MeSH terms

Ammonia
Bioreactors / microbiology
Denitrification
Nitrification
Nitrogen
Nitrogen Dioxide
Oxidation-Reduction
Ozone*
Sewage
Water Pollutants, Chemical*

Substances

Sewage
Water Pollutants, Chemical
Ozone
Ammonia
Nitrogen
Nitrogen Dioxide