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Article

Wastewater Biofilm Photosynthesis in Photobioreactors

1
LBA-Laboratory of Biology of Algae, Department of Biology, University of Rome “Tor Vergata”, 00133 Rome, Italy
2
CNR-IRSA, National Research Council, Water Research Institute, Area della Ricerca di Roma 1, 00010 Montelibretti (RM), Italy
*
Author to whom correspondence should be addressed.
Microorganisms 2019, 7(8), 252; https://doi.org/10.3390/microorganisms7080252
Received: 26 June 2019 / Revised: 3 August 2019 / Accepted: 8 August 2019 / Published: 10 August 2019
(This article belongs to the Special Issue Microbiological Wastewater Treatment)
Photosynthetic performance of algal-bacterial biofilms from an Italian wastewater treatment plant was studied in a flow-lane photobioreactor at different irradiances, temperatures, and flow regime to evaluate the effects of these environmental parameters on biofilms’ functioning, in view of application of these communities in wastewater biological treatment. Pulse amplitude modulated fluorescence was used to estimate the effective quantum yield of PSII (ΔF/Fm’) of the light-acclimated biofilms and to perform rapid light curves (RLCs) for the determination of the photosynthetic parameters (rel.ETRmax, α, Ik). Chl a, ash free dry weight (AFDW), and dry weight (DW) were measured to assess phototrophic and whole biofilm biomass development over time. From the analysis of photosynthetic parameter variation with light intensity, temperature and flow rate, it was possible to identify the set of experimental values favoring biofilm photosynthetic activity. Biomass increased over time, especially at the highest irradiances, where substrata were fastly colonized and mature biofilms developed at all temperatures and flow conditions tested. View Full-Text
Keywords: phototrophic biofilm; wastewater; photosynthesis; photobioreactor; Pulse Amplitude Modulated fluorescence; biofilm biomass phototrophic biofilm; wastewater; photosynthesis; photobioreactor; Pulse Amplitude Modulated fluorescence; biofilm biomass
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MDPI and ACS Style

Guzzon, A.; Di Pippo, F.; Congestri, R. Wastewater Biofilm Photosynthesis in Photobioreactors. Microorganisms 2019, 7, 252. https://doi.org/10.3390/microorganisms7080252

AMA Style

Guzzon A, Di Pippo F, Congestri R. Wastewater Biofilm Photosynthesis in Photobioreactors. Microorganisms. 2019; 7(8):252. https://doi.org/10.3390/microorganisms7080252

Chicago/Turabian Style

Guzzon, Antonella; Di Pippo, Francesca; Congestri, Roberta. 2019. "Wastewater Biofilm Photosynthesis in Photobioreactors" Microorganisms 7, no. 8: 252. https://doi.org/10.3390/microorganisms7080252

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