Free ammonia inhibition in microalgae and cyanobacteria grown in wastewaters: photo-respirometric evaluation and modelling
10.1016/j.biortech.2020.123046
Inclou dades d'ús des de 2022
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hdl:2117/187079
Tipus de documentArticle
Data publicació2020-06
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Abstract
The inhibitory effects of free ammonia (FA) on microalgae/cyanobacteria in wastewater-treating photobioreactors (PBR) can strongly reduce their treatment efficiency, increasing the operational costs and undermining the stability of the system. Although FA-promoting conditions (high pH, temperature and ammoniacal nitrogen concentration) are commonly met in outdoor PBRs, photosynthesis inhibition from FA has been scarcely explored and is rarely considered in microalgae-bacteria growth models. Two pilot systems and a series of lab-scale monocultures were tested using a photo-respirometry approach, to evaluate the effects of FA (8.5–136 mg NH3 L-1) on photosynthesis. Two mathematical inhibition models were compared, with the aim of selecting best-fitting equations to describe photo-respirometric experiments. A set of calibrated inhibition parameters was obtained for microalgae and cyanobacteria, growing in monocultures or in mixed algae-bacteria consortia. Cyanobacteria were more sensitive to FA than green microalgae and mixed phototrophs-bacteria consortia showed a higher resistance compared to monocultures. Estimated inhibition parameters were used to describe common operational/environmental conditions in algae-bacteria systems, demonstrating the potential drop in photosynthetic activity under those relevant operational conditions.
CitacióRossi, S. [et al.]. Free ammonia inhibition in microalgae and cyanobacteria grown in wastewaters: photo-respirometric evaluation and modelling. "Bioresource technology", Juny 2020, vol. 305, p. 123046:1-123046:11.
ISSN0960-8524
Versió de l'editorhttps://www.sciencedirect.com/science/article/abs/pii/S0960852420303151
Col·leccions
- Doctorat en Enginyeria Ambiental - Articles de revista [126]
- Departament d'Enginyeria Civil i Ambiental - Articles de revista [3.026]
- GEMMA - Grup d'Enginyeria i Microbiologia del Medi Ambient - Articles de revista [202]
- DECA - Grup de Recerca del Departament d'Enginyeria Civil i Ambiental - Articles de revista [173]
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