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Abstract

/C) wastewater under cathodic polarization (-0.4 V and -0.8 V vs. Ag/AgCl). We observed that cathodic polarization and IR irradiation can play a key role in microbial and phenotypic selection, promoting (at -0.4 V) or minimizing (at -0.8 V) the presence of PPB. Then, we further study how cathodic polarization modulates PPB biomass production providing a fluid-like electrode as part of a so-called photo microbial electrochemical fluidized-bed reactor (photoME-FBR). Our results revealed the impact of reduction status of carbon source in wastewater to select the PPB photoheterotrophic community and how electrodes drive microbial population shifts depending on the reduction status of such carbon source.

Keywords

WastewaterSewage treatmentMicrobial fuel cellAnodeBiomass (ecology)Fluidized bedPopulationPulp and paper industryMicroorganismCathodic protectionPhototrophEnvironmental chemistryMaterials scienceChemistryElectrodeEnvironmental scienceEnvironmental engineeringBacteriaPhotosynthesisEcologyBiology

Identifiers

DOI
10.3389/fmicb.2023.1115956
Journal
Frontiers in Microbiology
Year
2023