Enrichment and Aggregation of Purple Non-sulfur Bacteria in a Mixed-Culture Sequencing-Batch Photobioreactor for Biological Nutrient Removal From Wastewater.

ABSTRACT: Mixed-culture biotechnologies are widely used to capture nutrients from wastewater. Purple non-sulfur bacteria (PNSB), a guild of anoxygenic photomixotrophic organisms, rise interest for their ability to directly assimilate nutrients in the biomass. One challenge targets the aggregation and accumulation of PNSB biomass to separate it from the treated water. Our aim was to enrich and produce a concentrated, fast-settling PNSB biomass with high nutrient removal capacity in a 1.5-L, stirred-tank, anaerobic sequencing-batch photobioreactor (SBR). PNSB were rapidly enriched after inoculation with activated sludge at 0.1 gVSS L^-1 in a first batch of 24 h under continuous irradiance of infrared (IR) light (>700 nm) at 375 W m^-2, with Rhodobacter reaching 54% of amplic

SUBMITTER: Cerruti M 

PROVIDER: S-EPMC7773948 | biostudies-literature | 2020

REPOSITORIES: biostudies-literature