Potential effects of suspended TiO2 nanoparticles on activated sludge floc properties in membrane bioreactors.
Chemosphere
; 223: 148-156, 2019 May.
Article
en En
| MEDLINE
| ID: mdl-30772594
ABSTRACT
With the rapid development and application of consumer products containing nanoparticles (NPs), especially titanium dioxide (TiO2) NPs, the potential effects of suspended NPs on wastewater treatment has been a concern over the recent years. This study investigated the potential effects of suspended TiO2 NPs on activated sludge flocculation properties in a membrane bioreactor (MBR). Results showed that suspended TiO2 NPs inhibited the viability of activated sludge flocs, and led to bacterial protein secretion for bacterial protection, causing an overall protein increase of soluble microbial products. Suspended TiO2 NPs also destabilized the activated sludge floc structure and reduced flocculation capacity of flocs, causing an over production of organic matter and resulting in a floc size decrease of over 50%. Suspended TiO2 NPs also caused a change in the phylogenetic distribution of bacterial community. Whereby, the dominant species in activated sludge was replaced from Comamonadaceae to Thiotrichaceae in 50â¯mg/L suspended TiO2 NPs.
Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Contexto en salud:
2_ODS3
Problema de salud:
2_enfermedades_transmissibles
/
2_quimicos_contaminacion
Asunto principal:
Aguas del Alcantarillado
/
Titanio
/
Reactores Biológicos
/
Nanopartículas
Idioma:
En
Revista:
Chemosphere
Año:
2019
Tipo del documento:
Article