Insights into roles of triclosan in microalgal–bacterial symbiosis system treating wastewater

Concong Tang*, Tian Yang Wang, Rong Wang, Cristiano Varrone, Zixuan Gan, Zhang-Wei He*, Zhi-Lua Li, Xiaochang C. Wang

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

3 Citations (Scopus)

Abstract

Triclosan (TCS) is an antimicrobial agent and frequently detected in wastewater or water body. This study investigated the role of TCS in microalgal-bacterial symbiosis (MABS) system treating wastewater. The results showed that the removal efficiencies of NH 4 +–N, total nitrogen, and total phosphorus decreased under increased TCS stress, with decrease ratios of 26.5%, 16.9%, and 34.7%. The activities of microalgae were more affected than that of bacteria. The secretion of extracellular polymeric substances (EPSs) and activity of superoxide dismutase firstly increased and then decreased with aggravated TCS stress, while the accumulation of malondialdehyde increased, leading to increased permeability of cytomembrane and bioaccumulation of TCS. In addition, the aggregation properties of microalgae and bacteria were enhanced with TCS loading increasing, and the migration of TCS was affected by enhanced EPSs secretions and MABS aggregates. This work may provide some new insights into the roles of TCS in MABS system.

Original languageEnglish
Article number129331
JournalBioresource Technology
Volume385
ISSN0960-8524
DOIs
Publication statusPublished - Oct 2023

Keywords

  • Microbial activity
  • Nutrient removal
  • Symbiosis
  • Triclosan accumulation
  • bacteria
  • microalgae
  • wastwater

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