Título principal
Estratégia de maturação de biorreator de leito móvel sob condição de enriquecimento do biofilme aderido para cultivos de recirculação de água doce [recurso eletrônico] / Augusto Costa Cardoso ; orientador, Katt Regina Lapa.
Data de publicação
2022
Descrição física
50 p. : il., gráfs.
Nota
Disponível somente em versão on-line.
Dissertação (mestrado) - Universidade do Estado de Santa Catarina, Centro de Ciências Agrárias, e Pós-Graduação em Aquicultura, Florianópolis, 2022.
Inclui referências.
Estratégia de maturação de biorreator de leito móvel sob condição de enriquecimento do biofilme aderido para cultivos de recirculação de água doce [recurso eletrônico] / Augusto Costa Cardoso ; orientador, Katt Regina Lapa.
Data de publicação
2022
Descrição física
50 p. : il., gráfs.
Nota
Disponível somente em versão on-line.
Dissertação (mestrado) - Universidade do Estado de Santa Catarina, Centro de Ciências Agrárias, e Pós-Graduação em Aquicultura, Florianópolis, 2022.
Inclui referências.
Abstract: The moving bed biofilm reactor, known by the acronym MBBR, is an equipment used for the removal of organic compounds and frequently found in recirculation aquaculture systems due to its wide range of advantages such as energy consumption, simplified maintenance and more compact treatment plants compared to other biofilters. However, one of the limitations faced by producers when using biofilters is the long maturation period that this system needs to be able to fully nitrify. This work aimed to evaluate the best biofilm maturation strategy in a moving bed bioreactor with biomass adhered to a support material, using a medium enriched with NH4Cl and a medium without enrichment. The experiment consisted of 2 independent aquaculture recirculation systems, simulating a freshwater fish culture that produced a concentration of 1.0 mg/L of TAN. Each treatment consisted of a reservoir and two experimental bioreactors that received support materials for the colonization of the adhered biomass. The results indicated that the enriched treatment bioreactors had a slower performance, taking 29 days to reach maturation, while the enriched treatment took 27 days. The results suggest that the nitration process in the control treatment performed better than the enriched bioreactors. The Candidatus Nitrospira defluvii species, responsible for acting in the nitrification process, became more abundant in the control treatment where it represented 23% of the biofilm composition, while the enriched treatment presented only 3%. The study concluded that the maturation process of MBBR using NH4Cl enrichment was slower than the treatment without enrichment. However, both treatments had a satisfactory maturation speed, taking less than 30 days. It can be seen that the use of synthetic media such as NH4Cl and sodium acetate as sources of C:N associated with the effluent of Pimelodus Maculatus during the start-up process had an important benefit in the maturation time.