Use of magnetic powder to effectively improve the performance of sequencing batch reactors (SBRs) in municipal wastewater treatment

Yi Liu; Jixiang Li; Wenshan Guo; Huu Hao Ngo; Jiajun Hu; Min-Tian Gao

doi:10.1016/j.biortech.2017.06.069

Use of magnetic powder to effectively improve the performance of sequencing batch reactors (SBRs) in municipal wastewater treatment

Bioresour Technol. 2018 Jan;248(Pt B):135-139. doi: 10.1016/j.biortech.2017.06.069. Epub 2017 Jun 15.

Authors

Yi Liu¹, Jixiang Li², Wenshan Guo³, Huu Hao Ngo⁴, Jiajun Hu⁵, Min-Tian Gao⁵

Affiliations

¹ Shanghai Advanced Research Institute, Chinese Academy of Science, Shanghai 201210, China; College of Sciences, Shanghai University, Shanghai 200444, China.
² Shanghai Advanced Research Institute, Chinese Academy of Science, Shanghai 201210, China; State Key Laboratory of Separation Membranes and Membrane Processes, Tianjin Polytechnic University, Tianjin 300387, China.
³ Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, Sydney, NWS 2007, Australia.
⁴ Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, Sydney, NWS 2007, Australia. Electronic address: h.ngo@uts.edu.au.
⁵ Shanghai Key Laboratory of Bio-Energy Crops, School of Life Sciences, Shanghai University, Shanghai 200444, China.

PMID: 28651876
DOI: 10.1016/j.biortech.2017.06.069

Abstract

This study aims to investigate the effect of adding magnetic powder in the sequencing batch reactor (SBR) on the reactor performance and microbial community. Results indicated that, the magnetic activated sludge sequencing batch reactor (MAS-SBR) had 7.76% and 4.76% higher ammonia nitrogen (NH₄⁺-N) and chemical oxygen demand (COD) removal efficiencies than that of the conventional SBR (C-SBR). The MAS-SBR also achieved 6.86% sludge reduction compared with the C-SBR. High-throughput sequencing demonstrated that the dominant phyla of both SBRs (present as ≥1% of the sequence reads) were Protebacteria, Bacteroidetes, Chloroflexi, Saccharibacteria, Chlorobi, Firmicutes, Actinobactoria, Acidobacteria, Planctomycetes and unclassified_Bacteria. The relative abundance of Protebacteria and Bacteroidetes simultaneously declined whereas the other 8 phyla increased following the addition of magnetic powder. Adding magnetic powder in the SBR significantly affected the microbial diversity and richness of activated sludge, consequently affecting the reactor performance.

Keywords: High-throughput sequencing; Magnetic activated sludge; Microbial diversity and richness; Sequencing batch reactor; Sludge reduction.

MeSH terms

Bioreactors*
Nitrogen
Phosphorus
Sewage
Waste Disposal, Fluid*
Wastewater*

Substances

Sewage
Waste Water
Phosphorus
Nitrogen