Use este identificador para citar ou linkar para este item: https://locus.ufv.br//handle/123456789/21801
Tipo: Artigo
Título: Microalgal biomass production and nutrients removal from domestic sewage in a hybrid high-rate pond with biofilm reactor
Autor(es): Assis, Letícia Rodrigues de
Calijuri, Maria Lúcia
Couto, Eduardo de Aguiar do
Assemany, Paula Peixoto
Abstract: In this study, biomass production and domestic sewage treatment in hybrid systems under bacterial-microalga consortia were assessed. Biomass was grown suspended in the growth media of high-rate ponds (HRPs) and attached in biofilm reactors (BRs). These hybrid systems were operated with and without the addition of CO2 (HS2 and HS1, respectively) in the HRP growth media. The performances of these systems were compared with that of a conventional HRP with CO2 supplementation. Regarding sewage treatment with microalgae and bacteria consortia, the three systems showed no significant differences in the removal of organisms associated with faecal contamination, organic matter and most nutrients. However, nitrate levels were increased in the hybrid systems due to the presence of BRs. There were no differences in algal biomass production among the three systems, which remained in the 0.6–0.7 g m−2 range. HS1 showed the highest total biomass production of 101.31 g m−2 at a production rate of 6.79 g m−2 day−1. The BR of HS1 was able to supply the necessary CO2 and therefore no additional gas supplementation was required. This result indicates that a conventional HRP with CO2 supplementation can be replaced by a hybrid system with biofilm reactor, with additional advantages of resources saving, operational simplicity and easier harvesting.
Palavras-chave: Algal biofilm
Attached growth
Bacterial-microalgae consortia
Biomass collection
Domestic sewage treatment
Editor: Ecological Engineering
Tipo de Acesso: Elsevier B.V.
URI: https://doi.org/10.1016/j.ecoleng.2017.05.040
http://www.locus.ufv.br/handle/123456789/21801
Data do documento: Set-2017
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