Influence of back mixing on the convective drying of residual sludges in a fixed bed.
Water Res
; 42(10-11): 2671-7, 2008 May.
Article
em En
| MEDLINE
| ID: mdl-18316109
ABSTRACT
The influence of a backmixing operation on the convective belt drying of two wastewater sludges was studied. The expansion of the sludge extrudates bed due to increasing additions of dry product was quantified by using X-ray tomography. This non-invasive technique was used to determine the bed porosity and the total exchange area available for heat and mass transfers, for increasing levels of backmixing. For a same drying flux, the expansion of the drying bed leads to higher drying rates, allowing a reduction of the total drying time. In this context, rheological properties of the sludges are key properties.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Esgotos
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Convecção
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Dessecação
Idioma:
En
Revista:
Water Res
Ano de publicação:
2008
Tipo de documento:
Article
País de afiliação:
Bélgica