TY - JOUR
T1 - 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
AU - Cheng, Yu
AU - Li, Jiao Yang
AU - Ren, Xianghao
AU - Li, Ying
AU - Kou, Ying Ying
AU - Chon, Kangmin
AU - Hwang, Moon Hyun
AU - Ko, Myung Han
N1 - Funding Information:
This work was funded by Open Research Fund Program of Key Laboratory of Urban Stormwater System and Water Environment ( Beijing University of Civil Engineering and Architecture ), Ministry of Education, and also supported by BUCEA and DJU International IAR Cooperation Center.
Publisher Copyright:
© 2021 Elsevier B.V.
PY - 2022/1
Y1 - 2022/1
N2 - 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.
AB - 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.
KW - Food-processing wastewater
KW - Micro-aerobic reactor
KW - Organic matter
KW - Simultaneous nitrification and denitrification
UR - http://www.scopus.com/inward/record.url?scp=85116869056&partnerID=8YFLogxK
U2 - 10.1016/j.bej.2021.108218
DO - 10.1016/j.bej.2021.108218
M3 - Article
AN - SCOPUS:85116869056
VL - 177
JO - Biochemical Engineering Journal
JF - Biochemical Engineering Journal
SN - 1369-703X
M1 - 108218
ER -