High efficiency of simultaneous nitrification, denitrification, and organics removal in the real-scale treatment of high C/N ratio food-processing wastewater using micro-aerobic reactors

Yu Cheng, Jiao Yang Li, Xianghao Ren, Ying Li, Ying Ying Kou, Kangmin Chon, Moon Hyun Hwang, Myung Han Ko

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

Micro-aerobic reactors (MARs) play an important role in simultaneous nitrification, denitrification, and organics removal but are affected by the C/N ratio. In this study, high C/N ratio food-processing wastewater was treated using two-step MARs. The average removal efficiencies of total nitrogen and chemical oxygen demand during the MAR process were 84.21% and 95.43%, respectively. The efficiency of simultaneous nitrification and denitrification was 88.87% and 17.26% in MAR-1 and MAR-2, respectively; simultaneously, organic matter was efficiently degraded. Protein-like materials were biodegraded preferentially, and the degree of change in fulvic-like substances was the greatest during the MAR processes. This was attributed to the spatial distribution of the dissolved oxygen concentration in a single MAR, which may influence the microbial community composition (e.g., that of Nitrospira) and the regulation of gene functions.

Original languageEnglish
Article number108218
JournalBiochemical Engineering Journal
Volume177
DOIs
Publication statusPublished - 2022 Jan

Keywords

  • Food-processing wastewater
  • Micro-aerobic reactor
  • Organic matter
  • Simultaneous nitrification and denitrification

ASJC Scopus subject areas

  • Biotechnology
  • Bioengineering
  • Environmental Engineering
  • Biomedical Engineering

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