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http://dx.doi.org/10.4491/KSEE.2012.34.12.821

A Study on the Closed-Loop Air Drying Technology for Drying Wastewater Sludge  

Lee, Jung-Eun (Center of PNU Energy Education Technolgy, Pusan National University)
Cho, Eun-Man (Reentec Engineering Company)
Kang, Dong-Hyo (Busan Environmental Corporation)
Publication Information
Journal of Korean Society of Environmental Engineers / v.34, no.12, 2012 , pp. 821-827 More about this Journal
Abstract
Air drying is a technology to dry sludge at the ejector and multi cyclone as intaking and blowing air from outside. So, this technology has a weak point that operating fluctuation is large according to an outside conditions as well as energy consumption is also large due to open loop structure. This is to develop the closed-loop air drying system to be built the dehumidifier consisted of condenser, cooler and compressor at rear side of separator of air dryer, as a way to solve some problem. Air is circulation by the method of blowing-drying-dehumidifying-blowing within this system. It is analyzed that an air circulated at closed-loop air drying equipment contains the energy of 50% more compared with open-loop air drying and is operated regularly because of quality maintenance of air to dry sludge. And also it is analyzed that the cost of drying sludge of 1 ton by closed-loop air drying equipment is lower about 35% than conventional equipment. Therefore, this is evaluated by useful drying technology to face an unexpected climatic conditions due to regular operation as well as low energy consumption.
Keywords
Closed-Loop Air Drying System; Open-Loop Air Drying System; Dehumidifier; Sludge; Drying Energy;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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1 Lee, J. E., "Thermal Dewatering (TDW) to Reduce the Water Content of Sludge," Drying Technol., 24(10), 225-232 (2006).   DOI   ScienceOn
2 Lee, J. E., "Dewatering System for Sludge Reduction," Geosyst. Eng., 9(3), 55-64(2006).   DOI
3 Lee, J. E., Cho, E. M. and Kim, B. H., "Air Drying Technology for Dewatered Cake from Wastewater and Waterworks Sludge," J. Kor. Soc. Environ. Eng., 28(11), 1154-1161 (2006).
4 Lee, J. E. and Cho, E. M., "A Study on air jet drying for water content reduction of sludge," Korean J. Chem. Eng., 27(6), 1822-1828(2010).   DOI
5 Lee, J. E., "A Study on Thermal Dewaterung for Improving the Dewaterability of the Municipal Wastewater Sludge" J. Kor. Soc. Environ. Eng., 26(5), 601-609(2004).
6 Kudara, T. and Mujumdar, A. S., "Advanced Drying Technologies," Marcel Dekker INC., New York, pp.49-67(2002).
7 中村 正秋, 立元 雄冶, "乾燥技術," 工業調査會, pp.18-23 (2005).
8 Lee, J. E., "A Study on the Dewaterability of Mixed Particles," J. Kor. Soc. Environ. Eng., 26(8), 925-932(2004).