A novel reactor combining anammox and Fenton-like reactions for the simultaneous removal of organic carbon and nitrogen at different organic carbon to nitrogen ratios

Luong Van Duc; Hiroaki Ito; Takehide Hama; Jongsun Kim; Yasunori Kawagoshi

doi:10.1016/j.jenvman.2020.110832

A novel reactor combining anammox and Fenton-like reactions for the simultaneous removal of organic carbon and nitrogen at different organic carbon to nitrogen ratios

J Environ Manage. 2020 Oct 1:271:110832. doi: 10.1016/j.jenvman.2020.110832. Epub 2020 Jul 3.

Authors

Luong Van Duc¹, Hiroaki Ito¹, Takehide Hama¹, Jongsun Kim², Yasunori Kawagoshi³

Affiliations

¹ Center for Water Cycle, Marine Environment and Disaster Management, Kumamoto University, 2-39-1 Kurokami, Chuo-Ku, Kumamoto, 860-8555, Japan.
² Virginia Institute of Marine Science, College of William and Mary, Gloucester Point, VA, 23062, USA.
³ Center for Water Cycle, Marine Environment and Disaster Management, Kumamoto University, 2-39-1 Kurokami, Chuo-Ku, Kumamoto, 860-8555, Japan. Electronic address: goshi@kumamoto-u.ac.jp.

PMID: 32778254
DOI: 10.1016/j.jenvman.2020.110832

Abstract

A Fenton-like reaction and anaerobic ammonium oxidation (anammox) were combined to construct a novel process named FenTaMox for removing nitrogen (N) and organic carbon (measured as chemical oxidation demand (COD)). Two columns were packed with iron-manganese-sepiolite, a catalyst that uses hydrogen peroxide (H₂O₂) to catalyze Fenton-like reactions, and inoculated with marine anammox bacteria. During the start-up, marine anammox medium was fed into both columns to acclimate the marine anammox bacteria to iron-manganese-sepiolite. Batch experiments revealed that the marine anammox bacteria were not affected by 60 mgL^-1 of H₂O₂. Next, medium containing glucose and H₂O₂ was fed into one column as the FenTaMox treatment, while medium containing glucose but no H₂O₂ was fed into the other column as the control. At a COD/N of 4, FenTaMox exhibited higher removal efficiencies of N and COD compared with that of the control, suggesting the application of FenTaMox for organic carbon- and N- removal.

Keywords: Anammox bacteria; COD/N ratio; Fenton-like reaction; Iron-manganese-sepiolite; N.

MeSH terms

Anaerobiosis
Bioreactors
Carbon*
Denitrification
Hydrogen Peroxide
Nitrogen*
Oxidation-Reduction

Substances

Carbon
Hydrogen Peroxide
Nitrogen