Attrition of sewage sludge and sludge-based char in a fluidized bed reactor

Young Hean Choung; Ki Chul Cho; Won Joon Choi; Soo Gon Kim; Young Suk Han; Kwang Joong Oh

Korean Journal of Chemical Engineering, Vol.24, No.4, 660-663, July, 2007

DOI10.1007/s11814-007-0021-y Export Citation

Attrition of sewage sludge and sludge-based char in a fluidized bed reactor

Young Hean Choung, Ki Chul Cho, Won Joon Choi, Soo Gon Kim¹, Young Suk Han, and Kwang Joong Oh^†

Department of Environmental Engineering, Pusan National University, Busan 609-735, Korea
¹Division of Remediation Technology, QEN Solution, Ulsan 680-190, Korea

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Fluidized bed pyrolysis has been recognized as an innovative technology for sewage sludge treatment. The physical and attrition properties of sewage sludge are changed through the fluidized bed pyrolysis. The minimum fluidization velocities and attrition rate constants for sewage sludge and sludge based-char were obtained from pressure drop and attrition tests. As a result, sewage sludge with 20% moisture content and char were classified as Geldart B solids and the superficial gas velocity for bubbling fluidization was 0.2142-0.8755m/s. In addition, attrition of the sewage sludge and char was more affected by particle size than by material type. The equations for the overall attrition rate constants are Ka×105=1.09U.14.82 for sludge and ln ka=0.1(U.Umf).13.63 for char, respectively.

Keywords:Sewage Sludge;Char;Bubbling Fluidized Bed;Attrition

[References]

Takahashi M, Kato S, Sarai E, Ichioka T, Htayakawa S, Miyajiri H, Chemosphere, 44, 23 (2001)
Yun YS, Lee GB, Energy Engg. J., 13(1), 82 (2004)
Rozada F, Calvo LF, Garcia AI, Martin-Villacorta J, Otero M, Bioresour. Technol., 87(3), 221 (2003)
Gwyn JE, AIChE J., 15(1), 35 (1969)
Forsythe WL, Hertwig WR, Ind. Eng. Chem., 41, 1200 (1949)
Kunii D, Levenspiel O, Fluidization engineering, Butter worth-Heinemann (1991)
Cagnon B, Py X, Guillot A, Stoeckli F, Microporous Mesoporous Mater., 57, 273 (2003)
Chang YM, Chou CM, Su KT, Hung CY, Wu CH, Waste Manage., 25, 249 (2005)
Cook JL, Khang SJ, Lee SK, Keener TC, Powder Technol., 89(1), 1 (1996)
Geldart D, Baeyens J, Powder Technol., 42, 67 (1985)
Kim MR, Jang JG, Lee JK, Korean J. Chem. Eng., 22(1), 61 (2005)
Lee SS, Yoo JS, Moon GH, Park SW, Park DW, Oh KJ, Am. Chem. Soc., Div. Fuel Chem., 48 (2003)
Lin CL, Wey MY, Korean J. Chem. Eng., 20(6), 1123 (2003)
Lin CL, Wey MY, Korean J. Chem. Eng., 22(1), 154 (2005)
Lin L, Sears JT, Wen CY, Powder Technol., 27, 105 (1980)
Park YS, Kim HS, Shun D, Song KS, Kang SK, Korean J. Chem. Eng., 17(3), 284 (2000)

[Referenced By]

[1] Takahashi M, Kato S, Sarai E, Ichioka T, Htayakawa S, Miyajiri H, Chemosphere, 44, 23 (2001)

[2] Yun YS, Lee GB, Energy Engg. J., 13(1), 82 (2004)

[3] Rozada F, Calvo LF, Garcia AI, Martin-Villacorta J, Otero M, Bioresour. Technol., 87(3), 221 (2003)

[4] Gwyn JE, AIChE J., 15(1), 35 (1969)

[5] Forsythe WL, Hertwig WR, Ind. Eng. Chem., 41, 1200 (1949)

[6] Kunii D, Levenspiel O, Fluidization engineering, Butter worth-Heinemann (1991)

[7] Cagnon B, Py X, Guillot A, Stoeckli F, Microporous Mesoporous Mater., 57, 273 (2003)

[8] Chang YM, Chou CM, Su KT, Hung CY, Wu CH, Waste Manage., 25, 249 (2005)

[9] Cook JL, Khang SJ, Lee SK, Keener TC, Powder Technol., 89(1), 1 (1996)

[10] Geldart D, Baeyens J, Powder Technol., 42, 67 (1985)

[11] Kim MR, Jang JG, Lee JK, Korean J. Chem. Eng., 22(1), 61 (2005)

[12] Lee SS, Yoo JS, Moon GH, Park SW, Park DW, Oh KJ, Am. Chem. Soc., Div. Fuel Chem., 48 (2003)

[13] Lin CL, Wey MY, Korean J. Chem. Eng., 20(6), 1123 (2003)

[14] Lin CL, Wey MY, Korean J. Chem. Eng., 22(1), 154 (2005)

[15] Lin L, Sears JT, Wen CY, Powder Technol., 27, 105 (1980)

[16] Park YS, Kim HS, Shun D, Song KS, Kang SK, Korean J. Chem. Eng., 17(3), 284 (2000)