Variabilidade na estrutura das comunidades fitoplanctônicas e influência no funcionamento de lagoa de estabilização
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2020
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Resumo
Density of phytoplankton in stabilization ponds influences treatment performance. The
study hypothesized that the phytoplankton community structure varies according to local and
temporal changes and consequently influences the treatment of the effluent. Phytoplankton
community structure in facultative and maturation ponds in central Brazil was analyzed to
provide guidance on system operation and maintenance. Further, species density, abundance,
diversity, richness, dominance and beta diversity were measured. The efficiency of the
treatment was evaluated based on Biochemical Oxygen Demand (BOD). Additionally, a
Canonical Correspondence Analysis (CCA) was used to investigate how physical and chemical
variables influenced the composition of the most abundant species in the dry and rainy seasons
and the microalgae that were most related to the removal of BOD. One hundred and sixty-eight
taxa were recorded, and the most abundant classes in both ponds were Chlorophyceae and
Cyanophyceae (40% potentially toxic). The maturation pond had greater adaptability in the
rainy season, while the facultative pond was more flexible in the dry season. The best period of
growth varied among species. In both ponds, Chlorella minutissima was the one which most
contributed to the optimization of the treatment. Thus, identifying phytoplankton species and
relating them to water quality parameters and weather can help to understand the ecological
dynamics of wastewater treatment and provide useful information for the operation and
maintenance of stabilization ponds.
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Cyanobacteria, Diversity, Wastewater, Águas residuárias, Cianobactéria, Diversidade
Citação
D'ALESSANDRO, Emmanuel Bezerra; NOGUEIRA, Ina de Souza; HOFFMANN, Nora Katia Saavedra del Aguila. Variability in phytoplankton community structure and influence on stabilization pond functioning. Revista Ambiente & Água, [s. l.], v. 15, n. 2, e2507, 2020. DOI: 10.4136/ambi-agua.2507. Disponível em: https://www.scielo.br/j/ambiagua/a/8BtTvc8CQc3mQFYcRzbBmry/?lang=en. Acesso em: 4 nov. 2024.