Please use this identifier to cite or link to this item: http://hdl.handle.net/10553/119732
Title: Photosynthesis Monitoring in Microalgae Cultures Grown on Municipal Wastewater as a Nutrient Source in Large-Scale Outdoor Bioreactors
Authors: Masojidek, J
Gomez-Serrano, C
Ranglova, K
Cicchi, B
Bogeat, AE
Manoel, JAC
Zurano, AS
Benavides, AMS
Barcelo-Villalobos, M
Carnero, VAR
Ordog, V
Gómez Pinchetti, Juan Luis 
Voros, L
Arbib, Z
Rogalla, F
Torzillo, G
Figueroa, FL
Acien-Fernandez, FG
UNESCO Clasification: 339001 Biotecnología de microalgas
241707 Algología (ficología)
Keywords: Biomass
Biostimulanting activity
Chlorophyll fluorescence
Microalga
Micractinium, et al
Issue Date: 2022
Journal: Biology 
Abstract: Microalgae cultures were used for a WW treatment to remediate nutrients while producing biomass and recycling water. In these trials, raceway ponds (RWPs; 1 and 0.5 ha) were located next to a municipal (WW) treatment plant in Mérida, Spain. The ponds were used for continuous, all-year-round microalgae production using WW as a source of nutrients. Neither CO2 nor air was supplied to cultures. The objective was to validate photosynthesis monitoring techniques in large-scale bioreactors. Various in-situ/ex-situ methods based on chlorophyll fluorescence and oxygen evolution measurements were used to follow culture performance. Photosynthesis variables gathered with these techniques were compared to the physiological behavior and growth of cultures. Good photosynthetic activity was indicated by the build-up of dissolved oxygen concentration up to 380% saturation, high photochemical yield (Fv/Fm = 0.62–0.71), and relative electron transport rate rETR between 200 and 450 μmol e− m−2 s−1 at midday, which resulted in biomass productivity of about 15–25 g DW m−2 day−1. The variables represent reliable markers reflecting the physiological status of microalgae cultures. Using waste nutrients, the biomass production cost can be significantly decreased for abundant biomass production in large-scale bioreactors, which can be exploited for agricultural purposes.
URI: http://hdl.handle.net/10553/119732
ISSN: 2079-7737
DOI: 10.3390/biology11101380
Source: Biology [ISSN 2079-7737], v. 11, 1380
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