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Drying characteristics of sewage sludge |
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| Authors: | Jiang Qian Yeong Woo Yoon Pil Sang Youn Ji Hye Kim Don Sun Choi Jeong-Hoo Choi Young Chan Choi and Bongjin Jung |
| Affiliation: | (1) Institute of Environment and Biogeochemistry, Zhejiang University, Hangzhou, 310027, People’s Republic of China;(2) Hangzhou Xinyuan Environmental Engineering Co. Ltd, Hangzhou, 310012, People’s Republic of China;(3) Lawrence Berkeley National Laboratory, One Cyclotron Road, MS: 90-1116, Berkeley, 94720, USA; |
| 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. |
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