Toward enhanced performance of integrated photo-bioelectrochemical systems: Taxa and functions in bacteria-algae communities

Curr Opin Chem Biol. 2020 Dec:59:130-139. doi: 10.1016/j.cbpa.2020.05.010. Epub 2020 Aug 1.

Abstract

An integrated photo-bioelectrochemical (IPB) system uses microalgae in the cathode of a microbial fuel cell to achieve higher electricity generation and nutrient removal from wastewater. Using multivariate analysis and surveys of IPB studies, this paper identifies key algal and bacterial taxa and discusses their functions critical for IPB performance. Unicellular algae with high photosynthetic oxygen production and biofilm formation can enhance IPB energy production. Diverse bacterial taxa achieve nitrogen transformations and can improve total nitrogen removal. Understanding bacteria-algae interactions via quorum sensing in the IPB cathode may potentially aid in boosting system performance. Future advances in development of IPBs for wastewater treatment will benefit from interdisciplinary collaboration in analysis of microbial community functions.

Keywords: Algae; Bioelectrochemical; Bioenergy; Microbial community; Microbial fuel cell.

Publication types

  • Research Support, U.S. Gov't, Non-P.H.S.
  • Review

MeSH terms

  • Bacteria / metabolism*
  • Bacterial Physiological Phenomena
  • Bioelectric Energy Sources / microbiology*
  • Electricity
  • Electrodes
  • Microalgae / metabolism*
  • Microalgae / physiology
  • Microbiota
  • Nitrogen / isolation & purification
  • Nitrogen / metabolism
  • Wastewater / analysis
  • Water Purification

Substances

  • Waste Water
  • Nitrogen