Purple phototrophic bacteria as a platform to create the next generation of wastewater treatment plants: Energy and resource recovery

Purple phototrophic bacteria are outcompeted by aerobic heterotrophs in the presence of oxygen

“…The resulting glucose consumption curve (Figure S3) was used to estimate the corresponding kinetic parameters. In agreement with most IWA mathematical models (and generally wastewater treatment modelling), a Monod kinetic function for substrate uptake was used (Batstone et al, 2002;Henze et al, 2000;Jeppsson et al, 2006;Puyol et al, 2019). The kinetic parameters (i.e.…”

Exploring the metabolic capabilities of purple phototrophic bacteria during piggery wastewater treatment

“…Therefore, PPB biomass production did not experience any significant decrease at 13 • C compared to 30 • C. In this context, PPB growth at low temperatures such as 13 • C represents an advantage over the cultivation of other phototrophs such as microalgae, which typically exhibit reduced growth at low temperatures and ranges of optimal temperature between 15 and 30 • C [34]. No biomass production was detected in D-30 due to the absence of electron acceptors such as NO 3 − , O 2 or organic compounds [35] for energy production via oxidative phosphorylation, thus preventing chemotrophic growth [1][2][3]. In addition, low carbon compounds (mainly short-chain VFAs) in PWW provided insufficient energy for efficient chemotropic growth of PPB compared to other chemoheterotrophic microorganisms [36,37].…”

Pathways to Water Sector Decarbonization, Carbon Capture and Utilization

“…Most of the reported experiences are batch cultures performed in enclosed photobioreactors under artificial infrared illumination (Budiman et al, 2014;Choorit et al, 2002;Madukasi & Zhang, 2010;Zhou et al, 2016). Domestic, agro-industrial and industrial wastewaters have been treated in PPB photobioreactors under laboratory-controlled conditions (Puyol et al, 2020). Two main photobioreactor configurations have been documented for the continuous treatment of wastewater: vertical and horizontal systems.…”

“…However, the different illumination conditions applied do not allow general conclusions to be drawn. In this context, while some authors applied light cycles of infrared radiation with intensities ranging between 45 and 133 W/m 2 , other studies have been performed using the complete light spectrum (visible and infrared) (Puyol et al, 2020). Multiple light sources have been applied: IR-LEDs, incandescent bulbs and fluorescent lamps with and without visible filters (Hiraishi et al, 1989;Hülsen et al, 2019).…”