Enhancement of biological nitrogen removal performance from low C/N municipal wastewater using novel carriers based on the nano-Fe3O4

Fengyuan Zhang; Quan Feng; Ying Chen; Xiaoshuang Shi; Kang Qin; Mingyi Lu; Fan Qin; Shanfei Fu; Rongbo Guo

doi:10.1016/j.biortech.2022.127914

Enhancement of biological nitrogen removal performance from low C/N municipal wastewater using novel carriers based on the nano-Fe₃O₄

Bioresour Technol. 2022 Nov:363:127914. doi: 10.1016/j.biortech.2022.127914. Epub 2022 Sep 14.

Authors

Fengyuan Zhang¹, Quan Feng², Ying Chen², Xiaoshuang Shi², Kang Qin³, Mingyi Lu¹, Fan Qin¹, Shanfei Fu², Rongbo Guo⁴

Affiliations

¹ Shandong Industrial Engineering Laboratory of Biogas Production & Utilization, Key Laboratory of Biofuels, Shandong Provincial Key Laboratory of Synthetic Biology, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China; Shandong Energy Institute, Qingdao 266101, PR China; Qingdao New Energy Shandong Laboratory, Qingdao 266101, PR China.
² Shandong Industrial Engineering Laboratory of Biogas Production & Utilization, Key Laboratory of Biofuels, Shandong Provincial Key Laboratory of Synthetic Biology, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, PR China; Shandong Energy Institute, Qingdao 266101, PR China; Qingdao New Energy Shandong Laboratory, Qingdao 266101, PR China.
³ College of Chemical and Biological Engineering, Shandong University of Science and Technology, Qingdao 266590, PR China.
⁴ Shandong Industrial Engineering Laboratory of Biogas Production & Utilization, Key Laboratory of Biofuels, Shandong Provincial Key Laboratory of Synthetic Biology, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, PR China; Shandong Energy Institute, Qingdao 266101, PR China; Qingdao New Energy Shandong Laboratory, Qingdao 266101, PR China. Electronic address: guorb@qibebt.ac.cn.

PMID: 36113814
DOI: 10.1016/j.biortech.2022.127914

Abstract

The aim of this work was to study the effects of the magnetic microparticles (MMP) on nitrogen removal under low C/N conditions. A 30-day anaerobic/oxic progress illustrated that nitrification and denitrification were promoted in the presence of MMP. MMP could facilitate the production of extracellular polymeric substances (EPS) and act as pH buffering in aerobic conditions. The high-throughput sequencing displayed that, compared with the sludge without MMP, the relative abundance of Dokdonella and Comamonas which are capable of both nitrifying and denitrifying were 8.7% and 1.29% higher in anaerobic sludge and 7.11% and 0.97% higher in aerobic sludge with MMP, respectively. The relative abundance of Pseudomonas with the excellent capability of EPS secretion was also observed 4.33 times higher than that without MMP in the aerobic sludge. Based on the superior performance above, MMP is a promising additive to enhance nitrogen removal efficiency for low C/N wastewater.

Keywords: Anaerobic/oxic system; Denitrification; Fe(3)O(4) nanoparticles; Magnetic biocarriers; Nitrification.

MeSH terms

Bioreactors
Denitrification
Nitrification
Nitrogen*
Sewage
Waste Disposal, Fluid
Wastewater*

Substances

Sewage
Waste Water
Nitrogen