Lab- and pilot-scale photo-biofilter performance with algal–bacterial beads in a recirculation aquaculture system for rearing rainbow trout
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URI: http://hdl.handle.net/10835/15507
DOI: https://doi.org/10.1007/s10811-023-02981-6
DOI: https://doi.org/10.1007/s10811-023-02981-6
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Rodríguez-Leal, Sergio; Silva-Acosta, Jorge; Marzialetti, Teresita; Gallardo Rodríguez, Juan JoséFecha
2023-05-06Resumen
Industrial aquaculture has proliferated due to increased world demand for fish and seafood. Aerobic bacterial biofilters typically perform the nitrogen abatement of wastewater. Recirculation aquaculture systems (RAS) require nitrifying microorganisms developed in the biofilter. Despite the advantages of these biofilters, there are disadvantages, such as the time needed to mature, decrease in oxygen concentration, accumulation of organic matter and difficulty of backflushing, among others. On the other hand, microalgae effectively eliminate nutrients-pollutants, consuming inorganic carbon, nitrogen, and phosphorus and balancing soluble oxygen, conditions not attributable to nitrifying biofilters. The current study used a photo-biofilter to determine the depuration capacity of an immobilized co-culture of microalga Tetradesmus dimorphus and nitrifying bacteria isolated from a Salmon RAS. Bacteria frorm genera Flavobacterium, Microbacterium, Raoultella, Sphingobacterium, and Pseudomonas w...
Palabra/s clave
Recirculation aquaculture system
Biofilter
Nitrifying bacteria
Microalgae
Mixotrophic
Microbial community