Performance of nitrification-denitrification and denitrifying phosphorus removal driven by in-situ generated biogenic manganese oxides in a moving bed biofilm reactor

Jinfeng Zhong; Jiamin Liu; Rui Hu; Dandan Pan; Sicheng Shao; Xiangwei Wu

doi:10.1016/j.biortech.2023.128957

Performance of nitrification-denitrification and denitrifying phosphorus removal driven by in-situ generated biogenic manganese oxides in a moving bed biofilm reactor

Bioresour Technol. 2023 Jun:377:128957. doi: 10.1016/j.biortech.2023.128957. Epub 2023 Mar 24.

Authors

Jinfeng Zhong¹, Jiamin Liu¹, Rui Hu¹, Dandan Pan¹, Sicheng Shao², Xiangwei Wu¹

Affiliations

¹ College of Resources and Environment, Anhui Agricultural University, Key Laboratory of Agri-food Safety of Anhui Province, Hefei 230036, PR China.
² College of Resources and Environment, Anhui Agricultural University, Key Laboratory of Agri-food Safety of Anhui Province, Hefei 230036, PR China. Electronic address: sicheng2009010370@163.com.

PMID: 36965588
DOI: 10.1016/j.biortech.2023.128957

Abstract

Simultaneous removal of NH₄⁺-N, NO₃^--N, COD, and P by manganese redox cycling in nutrient wastewater was established with two moving bed biofilm reactors (MBBRs) with in-situ generated biogenic manganese oxides (BioMnOx) and non-BioMnOx. In-situ generated BioMnOx preferentially promoted the denitrification, and the average removal of NO₃^--N, NH₄⁺-N, and TN in the experimental MBBR with BioMnOx increased to 89.00%, 70.64%, and 76.06% compared with the control MBBR with non-BioMnOx. The relevant enzymes activity, extracellular polymeric substance (EPS), electron transport system activity (ETSA), and reactive oxygen species (ROS) were investigated. The element valence and morphology of purified BioMnOx were characterized by X-ray photoelectron spectroscopy (XPS) and transmission electron microscopy (TEM), as well as the effect of BioMnOx on nitrogen and phosphorus removal. The results suggested that BioMnOx could improve nitrogen conversion. Electrochemical characteristic and microbial community were detected. This study provided a new strategy for nutrients removal in BioMnOx-mediated wastewater treatment.

Keywords: Biogenic manganese oxides (BioMnOx); Denitrification; Manganese redox cycling; Microbial community; Moving bed biofilm reactor (MBBR).

MeSH terms

Biofilms
Bioreactors
Denitrification
Extracellular Polymeric Substance Matrix
Manganese
Nitrification*
Nitrogen
Oxides
Phosphorus
Waste Disposal, Fluid* / methods

Substances

Manganese
Phosphorus
manganese oxide
Oxides
Nitrogen