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Received October 1, 2010
Accepted January 13, 2011
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Drying characteristics of sewage sludge
Jiang Qian
Yeong Woo Yoon
Pil Sang Youn
Ji Hye Kim
Don Sun Choi
Jeong-Hoo Choi†
Young Chan Choi1
Bongjin Jung2
Department of Chemical Engineering, Konkuk University, 1 Whayang-dong, Gwangjin-gu, Seoul 143-701, Korea 1Korea Institute of Energy Research, 71-2 Jang-dong, Yuseong-gu, Daejeon 305-343, Korea 2Department of Environmental & Energy Engineering, The University of Suwon, Suwon 445-743, Korea
choijhoo@konkuk.ac.kr
Korean Journal of Chemical Engineering, July 2011, 28(7), 1636-1640(5), 10.1007/s11814-011-0009-5
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Abstract
To obtain the drying rate of sewage sludge for use in design of a conductive indirect-heating dryer with agitation, the drying characteristics of sewage sludge from three different wastewater treatment plants were investigated with a thermogravimetric analyzer (TGA) in isothermal conditions. Temperature and sample mass were considered as experimental variables. The drying mechanism agreed well with the shrinking core model dominated by the kinetic rate. The activation energy of drying was 17.30 kJ/g mol. A rate equation was proposed for drying of sewage sludge.
Keywords
References
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Deng WY, Yan JH, Li XD, Wang F, Zhu XW, Lu SY, Cen KF, J. Hazard. Mater., 162(1), 186 (2009)
Choi JH, Kim MH, Kim JH, Choi YC, Journal of the Chinese (Taiwan) Institute of Chemical Engineers., 41, 157 (2010)
McCabe WL, Smith JC, Harriott P, Unit operations of chemical engineering, 5th Ed., McGraw-Hill, New York, U.S.A. (1993)
Levenspiel O, Chemical reaction engineering, 3rd Ed., Wiley, New York, U.S.A. (1999)
Bird RB, Stewart WE, Lightfoot EN, Transport phenomena, 2nd Ed., Wiley, New York, U.S.A. (2002)
Himmelblau DM, Riggs JB, Basic principles and calculations in chemical engineering, 7th Ed., Prentice Hall, New Jersey, U.S.A. (2004)
Shafrinskii YS, Izvestiya Fiziko-Khimicheskogo Nauchno-Issledovatel'skogo Instituta pri Irkutskom Gosudarstvennom Universitete, 7,76 (1966)
Mayatskii VA, Sokolov LB, Gerasimov VD, Kasyanets AV, Zhurnal Prikladnoi Khimii (Sankt-Peterburg, Russian Federation), 57, 1632 (1984)
Roberts JS, Tong CH, Int. J. Food Properties., 6, 355 (2003)
Waje SS, Meshram MW, Chaudhary V, Pandey R, Mahanawar PA, Thorat BN, Brazilian J. Chem. Eng., 22, 209 (2005)
Arora S, Bharti S, Sehgal VK, Drying Technology., 24, 189 (2006)
Villeneuve S, Gelinas P, LWT-Food Science and Technology., 40, 465 (2006)
Di Scala K, Crapiste G, LWT-Food Science and Technology., 41, 789 (2008)
Tari O, Pekcan O, Drying Technology., 26, 101 (2008)
