Response of anaerobic membrane bioreactor to the presence of nano-Bi2WO6: reactor performance, supernatant characteristics, and microbial community

  • Lin Chen
  • Yue Wang
  • Chuqing Cao
  • Chang Liu
  • Liang Zhu
Research Article

Abstract

Considering the increasing incorporation of manufactured nano-material into consumer products, there is a concern about its potential impacts in biological wastewater treatment. In this study, the response of anaerobic sludge to the presence of Bi2WO6 nano-particles (NPs) was investigated in the anaerobic membrane bioreactor (AnMBR). As the concentration of Bi2WO6 in the reactor was controlled around 1 mg/L, there was no significant difference in effluent water quality or bacterial activities before and after NP exposure, partially due to the microbial-induced NP aggregation and stable complex formation. However, with the increasing dosage of Bi2WO6 from 5 to 40 mg/L, great influences on the AnMBR performance were observed, including the reduction of COD removal efficiency, inhibition of the mechanization step, increased production of soluble microbial products, and enhanced secretion of extracellular polymer substrates. Additional investigation with high-throughput sequencing was conducted, clearly demonstrating that Bi2WO6 NPs induced changes in the bacterial community.

Keywords

Anaerobic membrane bioreactor Bi2WO6 nano-particles COD removal Supernatant characteristics Microbial community 

Supplementary material

11356_2017_22_MOESM1_ESM.docx (1.6 mb)
ESM 1(DOCX 1615 kb)

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Copyright information

© Springer-Verlag GmbH Germany 2017

Authors and Affiliations

  • Lin Chen
    • 1
    • 2
  • Yue Wang
    • 1
    • 2
  • Chuqing Cao
    • 3
  • Chang Liu
    • 1
    • 2
  • Liang Zhu
    • 1
    • 2
  1. 1.Key Laboratory of Integrated Regulation and Resources Development of Shallow LakesHohai UniversityNanjingChina
  2. 2.College of EnvironmentHohai UniversityNanjingChina
  3. 3.School of Mechanical EngineeringNangjing University of Technology and ScienceNanjingChina

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