Reference : Multiscale structure characterization of sawdust-waste water sludge extrudates dried ...
Scientific journals : Article
Engineering, computing & technology : Chemical engineering
http://hdl.handle.net/2268/183349
Multiscale structure characterization of sawdust-waste water sludge extrudates dried in a pilot-scale fixed bed
English
Li, Jie [Université de Liège > Département de chimie appliquée > Génie chimique - Procédés et développement durable >]
Plougonven, Erwan mailto [Université de Liège > Département de chimie appliquée > Génie chimique - Procédés et développement durable >]
Fraikin, Laurent mailto [Université de Liège > Département de chimie appliquée > Génie chimique - Procédés et développement durable >]
Salmon, Thierry mailto [Université de Liège - ULiège > Département de Chimie Appliquée > > >]
Toye, Dominique mailto [Université de Liège > Département de chimie appliquée > Génie de la réaction et des réacteurs chimiques >]
Nistajakis, Emmanuel [> >]
Léonard, Angélique mailto [Université de Liège > Département de chimie appliquée > Génie chimique - Procédés et développement durable >]
27-Jun-2015
Biomass and Bioenergy
81
0
98 - 107
Yes (verified by ORBi)
International
0961-9534
[en] Waste water sludge ; Sawdust ; Convective drying ; X-ray tomography ; Mercury porosimetry
[en] Abstract Convective drying of waste water sludge and sawdust-sludge mixtures in a pilot-scale fixed bed was studied. Drying was performed in a cross-flow convective dryer using 500 g of wet material extruded through a disk with circular dies 12 mm in diameter. The structure of the bed mainly shows volume shrinkage and crack formation during drying. Several characterization techniques were used over a wide range of scales from nm up to mm. The overall bed structure was imaged with X-ray macrotomography, at a resolution of 0.36 mm per pixel. Single extrudates were scanned with X-ray microtomography, at a resolution of 41 μm per pixel. Pore structure of the dried samples were characterized by mercury porosimetry (7.5 nm < dp < 150 μm). Results show significant structural changes on all scales with increasing amounts of sawdust: shrinkage decreases, crack formation increases, and the pores become larger. This confirms the benefits of sawdust addition for sludge drying applications.
Researchers ; Professionals ; Students
http://hdl.handle.net/2268/183349
10.1016/j.biombioe.2015.06.009
http://www.sciencedirect.com/science/article/pii/S0961953415300234

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