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.
Park SI, Park KH, Anal. Sci. Technol., 10, 418, 1997
Stolarek P, Ledakowicz S, Water Sci. Technol., A Journal of the International Association on Water Pollution Research., 44, 333, 2001
Wang W, Li A, Anquan Yu Huanjing Xuebao., 7, 34, 2007
Du T, Cai J, Dong H, Yang B, Dongbei Daxue Xuebao, Ziran Kexueban., 29, 553, 2008
Jiang R, Li A, Wang W, Zhongguo Huanjing Kexue., 29, 22, 2009
Li RD, Yang YT, Li YL, Niu HC, Wei LH, Sun Y, Ke X, Huan jing ke xue=Huanjing kexue/[bian ji, Zhongguo ke xue yuan huan jing ke xue wei yuan hui "Huan jing ke xue" bian ji wei yuan hui.], 30, 3405, 2009
Slim R, Zoughaib A, Clodic D, J. Porous Media., 12, 1195, 2009
Choi CK, Yun DY, Chem. Ind. Technol., 8, 7, 1990
Kim JW, Drying characteristics of a mixed-flow dryer, M.S. Thesis, Department of Chemical Engineering, Konkuk University, Seoul, Korea, 1997
Choi JH, Kim JW, Moon YS, Kim SD, in ICheaP-9, Proceedings of 9th Int. Conf. on Chemical and Process Engineering, Chemical Engineering Transactions, Pierucci S Eds., Associazione Italiana Di Ingegneria Chimica (AIDIC), 17, 693, 2009