Assessment of zooplankton-based eco-sustainable wastewater treatment at laboratory scale.
Chemosphere
; 238: 124683, 2020 Jan.
Article
em En
| MEDLINE
| ID: mdl-31524620
ABSTRACT
The combination of the filtration capacity of zooplankton (e.g. Daphnia) with the nutrient removal capacity of bacterial/algal biofilm in a zooplankton-containing reactor could provide a natural-based alternative for wastewater treatment. A laboratory-scale zooplankton-based reactor was tested at different HRTs resulting in a significant reduction in nutrient concentrations in wastewater when the system was operated at HRTs longer than 1.1 days (preferably of between 2 and 4 days). However, the presence of high concentrations of organic matter (>250â¯mg COD L-1) in the wastewater inhibited zooplankton activity, limiting its use to tertiary treatment. Therefore, in combination with other natural treatments that can perform primary and secondary treatments, zooplankton may provide a solution for wastewater clarification and nutrient polishing. The effect of a common metal such as copper on the filtration capacity of Daphnia was also evaluated. Daphnia, as well as the whole zooplankton-based reactor, adapted to copper concentrations of up to 70⯵g Cu L-1 but an overload of 380⯵g Cu L-1 for two-weeks severely affected the biological system.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Bactérias
/
Zooplâncton
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Reatores Biológicos
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Daphnia
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Águas Residuárias
Limite:
Animals
Idioma:
En
Ano de publicação:
2020
Tipo de documento:
Article