Waste water sludge; Sawdust; Convective drying; X-ray tomography; Mercury porosimetry
Abstract :
[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.
Disciplines :
Chemical engineering
Author, co-author :
Li, Jie ; Université de Liège > Département de chimie appliquée > Génie chimique - Procédés et développement durable
Plougonven, Erwan ; Université de Liège > Département de chimie appliquée > Génie chimique - Procédés et développement durable
Fraikin, Laurent ; Université de Liège > Département de chimie appliquée > Génie chimique - Procédés et développement durable
Salmon, Thierry; Université de Liège - ULiège > Département de Chimie Appliquée
Toye, Dominique ; Université de Liège > Département de chimie appliquée > Génie de la réaction et des réacteurs chimiques
Nistajakis, Emmanuel
Léonard, Angélique ; Université de Liège > Département de chimie appliquée > Génie chimique - Procédés et développement durable
Language :
English
Title :
Multiscale structure characterization of sawdust-waste water sludge extrudates dried in a pilot-scale fixed bed
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Bibliography
Arlabosse P., Ferrasse J.H., Lecomte D., Crine M., Dumont Y., Léonard A. Efficient sludge thermal processing: from drying to thermal valorization. Modern Drying Technology: Energy Savings 2012, Vol. 4:295-329. Wiley-VCH, Weinheim.
Li J., Fraikin L., Salmon T., Bennamoun L., Toye D., Schreinemachers R., et al. Investigation on convective drying of mixtures of sewage sludge and sawdust in a fixed bed. Dry. Technol. 2015, 33(6):704-712.
Léonard A., Meneses E., Le Trong E., Salmon T., Marchot P., Toye D., et al. Influence of back mixing on the convective drying of residual sludges in a fixed bed. Water Res. 2008, 42(10):2671-2677.
Berghel J., Renström R. Basic design criteria and corresponding results performance of a pilot-scale fluidized superheated atmospheric condition steam dryer. Biomass Bioenergy 2002, 23(2):103-112.
Srinivasakannan C., Balasubramaniam N. Drying of rubber wood sawdust using tray dryer. Part. Sci. Technol. 2006, 24(4):427-439.
Léonard A., Blacher S., Marchot P., Pirard J.-P., Crine M. Measurement of shrinkage and cracks associated to convective drying of soft materials by X-ray microtomography. Dry. Technol. 2004, 22(7):1695-1708.
Uday K., Singh D. Investigation on cracking characteristics of fine-grained soils under varied environmental conditions. Dry. Technol. 2013, 31(11):1255-1266.
Niamnuy C., Devahastin S., Soponronnarit S. Some recent advances in microstructural modification and monitoring of foods during drying: a review. J.Food Eng. 2014, 123:148-156.
Ramachandran G., Lakshminarayanan A. Three-dimensional reconstruction from radiographs and electron micrographs: application of convolutions instead of Fourier transforms. PNatl. Acad. Sci. U. S. A. 1971, 68:2236-2240.
Shepp L., Logan B. The Fourier reconstruction of a head section. IEEE T Nucl. Sci. 1974, NS-21:21-43.
Feldkamp I., Davis L., Kress J. Practical cone-beam algorithm. J.Opt. Soc. Am. A 1984, 1:612-619.
Baruchel J., Buffière J.Y., Maire E., Merle P., Peix G. X-ray Tomography in Material Science 2000, Hermes Sciences Publications.
Brown K., Schlüter S., Sheppard A., Wildenschild D. On the challenges of measuring interfacial characteristics of three-phase fluid flow with X-ray microtomography. J.Microsc. 2014, 253(3):171-182.
Davit Y., Iltis G., Debenest G., Veran-Tissoires S., Wildenschild D., Gérino M., et al. Imaging biofilm in porous media using X-ray computed microtomography. J.Microsc. 2011, 242(1):15-25.
Pauwels E., Van Loo D., Cornillie P., Brabant L., Van Hoorebeke L. An exploratory study of contrast agents for soft tissue visualization by means of high resolution X-ray computed tomography imaging. J.Microsc. 2013, 250(1):21-31.
Parrilli A., Pagani S., Maltarello M., Santi S., Salerno A., Netti P., et al. Three-dimensional cellular distribution in polymeric scaffolds for bone regeneration: a microCT analysis compared to SEM, CLSM and DNA content. J.Microsc. 2014, 255(1):20-29.
Léonard A., Blacher S., Marchot P., Crine M. Use of X-ray microtomography to follow the convective heat drying of wastewater sludges. Dry. Technol. 2002, 20(4-5):1053-1069.
Léonard A., Blacher S., Marchot P., Pirard J.-P., Crine M. Image analysis of X-ray microtomograms of soft materials during convective drying. J.Microsc. 2003, 212(2):197-204.
Léonard A., Blacher S., Marchot P., Pirard J.P., Crine M. Moisture profiles determination during convective drying using X-ray microtomography. Can. J. Chem. Eng. 2005, 83(1):127-131.
Li J., Bennamoun L., Fraikin L., Salmon T., Toye D., Schreinemachers R., et al. Analysis of the shrinkage effect on mass transfer during convective drying of sawdust/sludge mixtures. Dry. Technol. 2014, 32(14):1706-1717.
Tao T., Peng X., Lee D. Thermal drying of wastewater sludge: change in drying area owing to volume shrinkage and crack development. Dry. Technol. 2005, 23(3):669-682.
Tao T., Peng X., Lee D. Structure of crack in thermally dried sludge cake. Dry. Technol. 2005, 23(7):1555-1568.
Marchot P., Toye D., Crine M., Pelsser A.-M., L'homme G. Investigation of liquid maldistribution in packed columns by X-ray tomography. Chem. Eng. Res. Des. 1999, 77(6):511-518.
Toye D., Crine M., Marchot P. Imaging of liquid distribution in reactive distillation packings with a new high-energy x-ray tomograph. Meas. Sci. Technol. 2005, 16(11):2213-2220.
Calvo S., Beugre D., Crine M., Léonard A., Marchot P., Toye D. Phase distribution measurements in metallic foam packing using X-ray radiography and micro-tomography. Chem. Eng. Process 2009, 48(5):1030-1039.
Aferka S., Marchot P., Crine M., Toye D. Interfacial area measurement in a catalytic distillation packing using high energy X-ray CT. Chem. Eng. Sci. 2010, 65(1):511-516.
Viva A., Aferka S., Brunazzi E., Marchot P., Crine M., Toye D. Processing of X-ray tomographic images: a procedure adapted for the analysis of phase distribution in mellapakplus 752. Y and katapak-SP packings. Flow. Meas. Instrum. 2011, 22(4):279-290.
Schmit C.E., Cartmel D.B., Eldridge R.B. The experimental application of X-ray tomography to a vapor-liquid contactor. Chem. Eng. Sci. 2001, 56(11):3431-3441.
Schmit C.E., Eldridge R.B. Investigation of X-ray imaging of vapor-liquid contactors. 1. studies involving stationary objects and a simple flow system. Chem. Eng. Sci. 2004, 59(6):1255-1266.
Schmit C.E., Perkins J., Eldridge R.B. Investigation of X-ray imaging of vapor-liquid contactors. 2. experiments and simulations of flows in an air-water contactor. Chem. Eng. Sci. 2004, 59(6):1267-1283.
Mahr B., Mewes D. CFD modelling and calculation of dynamic two-phase flow in columns equipped with structured packing. Chem. Eng. Res. Des. 2007, 85(8):1112-1122.
Gulati S., Behling M., Munshi P., Luke A., Mewes D. Tomographic KT-1 signature of phase-fraction distributions in multiphase bubble columns. Flow. Meas. Instrum. 2010, 21(3):249-254.
Athe P., Shakya S., Munshi P., Luke A., Mewes D. Characterization of multiphase flow in bubble columns using KT-1 signature and fractal dimension. Flow. Meas. Instrum. 2013, 33:122-137.
Ford J.J., Heindel T.J., Jensen T.C., Drake J.B. X-ray computed tomography of a gas-sparged stirred-tank reactor. Chem. Eng. Sci. 2008, 63(8):2075-2085.
Franka N.P., Heindel T.J. Local time-averaged gas holdup in a fluidized bed with side air injection using X-ray computed tomography. Powder Technol. 2009, 193(1):69-78.
Moukwa M., Aitcin P.-C. The effect of drying on cement pastes pore structure as determined by mercury porosimetry. Cem. Concr. Res. 1988, 18(5):745-752.
Di Q., Yang J., Zhao J., Wang W. Application of automatic mercury injection apparatus in study of astragalus slices drying. Dry. Technol. 2010, 28(5):677-682.
Madiouli J., Sghaier J., Lecomte D., Sammouda H. Determination of porosity change from shrinkage curves during drying of food material. Food Bioprod. Process 2012, 90(1):43-51.
Karathanos V. Collapse of structure during drying of celery. Dry. Technol. 1993, 11(5):1005-1023.
Rahman M.S., Al-Amri O.S., Al-Bulushi I.M. Pores and physico-chemical characteristics of dried tuna produced by different methods of drying. J.Food Eng. 2002, 53(4):301-313.
Léonard A., Blacher S., Pirard R., Marchot P., Pirard J.-P., Crine M. Multiscale texture characterization of wastewater sludges dried in a convective rig. Dry. Technol. 2003, 21(8):1507-1526.
American Society of Agricultural Engineers ASAE Standard No. D245.5: Moisture Relationships of Plant-based Agricultural Products 1996, 452-464. American Society of Agricultural Engineers, St. Joseph, MI.
Fraikin L., Herbreteau B., Chaucherie X., Nicol F., Crine M., Léonard A. Impact of storage at 4 °C on the study of sludge drying emissions. 2nd European Conference on Sludge Management; September 9-10; Budapest, Hungary 2010, T. Czibók (Ed.).
Léonard A., Blandin G., Crine M. Importance of rheological properties when drying sludge in a fixed bed. 4th Inter-american Drying Conference: Challenges for Efficient Drying Processes; August 23-27; Montreal, Canada 2009, T. Kudra (Ed.).
Huron Y., Salmon T., Crine M., Blandin G., Léonard A. Effect of liming on the convective drying of urban residual sludges. Asia-Pac J. Chem. Eng. 2010, 5(6):909-914.
Otsu N. Athreshold selection method from gray-level histograms. IEEE Trans. Syst. Man. Cybern. 1979, 9(1):62-66.
Léonard A., Vandevenne P., Salmon T., Marchot P., Crine M. Wastewater sludge convective drying: influence of sludge origin. Environ. Technol. 2004, 25(9):1051-1057.
Washburn E.W. Note on a method of determining the distribution of pore sizes in a porous material. Proc. Natl. Acad. Sci. 1921, 7(4):115-116.
Deng W., Li X., Yan J., Wang F., Chi Y., Cen K. Moisture distribution in sludges based on different testing methods. J.Environ. Sci. 2011, 23(5):875-880.
Li J., Fraikin L., Salmon T., Toye D., Léonard A. Convective drying of sawdust/sludge mixtures in a fixed bed: The effect of sludge origin. 19th International Drying Symposium; August 24-27; Lyon, France 2014, J. Andrieu (Ed.).
Plötze M., Niemz P. Porosity and pore size distribution of different wood types as determined by mercury intrusion porosimetry. Eur. J. Wood Prod. 2011, 69(4):649-657.
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