Data/hora: 01/06/2024 07:43:56

Provedor de dados: | 58
País: | Brazil
Título: | Microalgae population dynamics in photobioreactors with secondary sewage effluent as culture medium
Autores: | Marchello,Adriano E.; Lombardi,Ana T.; Dellamano-Oliveira,Maria José; Souza,Clovis W.O. de.
Data: | 2015-03-01
Ano: | 2015
Palavras-chave: | Microalgae; Effluent treatment; Coliforms; Escherichia coli; Chlorella vulgaris.
Resumo: | Nitrogen and phosphorus present in sewage can be used for microalgae growth, possibiliting cost reduction in the production of microalgae at the same time that it decreases the eutrophication potential of the effluent. This research aimed at monitoring the native community of microalgae and coliform bacteria in a secondary effluent from anaerobic municipal sewage treatment. Two treatments (aerated and non-aerated) were performed to grow microalgae under semi-controlled conditions in semi-closed photobioreactors in a greenhouse. The results showed no significant pH and coliforms (total and Escherichia coli) variation between treatments. Nutrient concentrations were reduced supporting microalgae growth up to 107 cells.mL−1independent of aeration. Exponential growth was obtained from the first day for the non-aerated, but a 5 day lag phase of growth was obtained for the aerated. Chlorella vulgaris was the dominant microalgae (99.9%) in both treatments. In the aerated, 5 algae classes were detected (Chlorophyceae, Cyanophyceae, Chrysophyceae, Bacillariophyceae and Euglenophyceae), with 12 taxa, whereas in the non-aerated, 2 classes were identified (Chlorophyceae and Cyanophyceae), with 5 taxa. We concluded that effluent is viable for microalgae growth, especially Chlorella vulgaris, at the same time that the eutrophication potential and coliforms are decreased, contributing for better quality of the final effluent.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822015000100075
Editor: | Sociedade Brasileira de Microbiologia
Relação: | 10.1590/S1517-838246120131225
Formato: | text/html
Fonte: | Brazilian Journal of Microbiology  v.46 n.1 2015
Fonte: | info:eu-repo/semantics/openAccess