Microbial community response to ciprofloxacin toxicity in sponge membrane bioreactor

Bao Trong Dang, Xuan Thanh Bui, Tomoaki Itayama, Huu Hao Ngo, Deokjin Jahng, Chitsan Lin, Shiao Shing Chen, Kun Yi Andrew Lin, Thanh Tin Nguyen, Dinh Duc Nguyen, Todd Saunders

Research output: Contribution to journalArticlepeer-review

18 Scopus citations

Abstract

This study aims to offer insights into how ciprofloxacin (CIP) impact bacterial community structures in the Sponge-MBR process when CIP is spiked into hospital wastewater. We found that the CIP toxicity decreased richness critical phylotypes such as phylum class ẟ-, β-, ɣ-proteobacteria, and Flavobacteria that co-respond to suppress denitrification and cake fouling to 37% and 28% respectively. Cluster analysis shows that the different community structures were formed under the influence of CIP toxicity. CIP decreased attached growth biomass by 2.3 times while increasing the concentration of permeate nitrate by 3.8 times, greatly affecting TN removal by up to 26%. Ammonia removal was kept stable by inflating the ammonia removal rate (p < 0.003), with the wealthy Nitrospira genus guaranteeing the nitrification activity. In addition, we observed an increasing richness of Chloroflexi and Planctomycetes, which may play a role in fouling reduction in the Sponge-MBR. Therefore, if the amount of antibiotics in hospital wastewater continues to increase, it is so important to extend biomass retention for denitrification recovery.

Original languageEnglish
Article number145041
JournalScience of the Total Environment
Volume773
DOIs
StatePublished - 15 Jun 2021

Bibliographical note

Publisher Copyright:
© 2021 Elsevier B.V.

Keywords

  • Antibiotics
  • Denitrification
  • Hospital wastewater
  • Membrane fouling
  • Microbial community
  • Sponge membrane bioreactor

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