Effect of nano-ZnO on biogas generation from simulated landfills.
Waste Manag
; 63: 18-26, 2017 May.
Article
em En
| MEDLINE
| ID: mdl-28126371
ABSTRACT
Extensive use of nanomaterials in commercial consumer products and industrial applications eventually leads to their release to the waste streams and the environment. Nano-ZnO is one of the most widely-used nanomaterials (NMs) due to its unique properties. It is also known to impact biological processes adversely. In this study, the effect of nano-ZnO on biogas generation from sanitary landfills was investigated. Two conventional and two bioreactor landfills were operated using real MSW samples at mesophilic temperature (35°C) for a period of about 1year. 100mg nano-ZnO/kg of dry waste was added to the simulated landfill reactors. Daily gas production, gas composition and leachate Zn concentrations were regularly monitored. A model describing the fate of the nano-ZnO was also developed. The results obtained indicated that as much as 99% of the nano-ZnO was retained within the waste matrix for both reactor operation modes. Waste stabilization was faster in simulated landfill bioreactors with and without the addition of nano-ZnO. Moreover, the presence of the nano-ZnO within the waste led to a decrease in biogas production of about 15%, suggesting that the nano-ZnO might have some inhibitory effects on waste stabilization. This reduction can have potentially significant implications on waste stabilization and the use of biogas from landfills as a renewable energy source.
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Base de dados:
MEDLINE
Assunto principal:
Óxido de Zinco
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Eliminação de Resíduos
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Poluentes Atmosféricos
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Instalações de Eliminação de Resíduos
Idioma:
En
Ano de publicação:
2017
Tipo de documento:
Article