Characteristics of Carbon Dioxide Gasification for Sewage Sludge in Microwave

Title & Authors
Characteristics of Carbon Dioxide Gasification for Sewage Sludge in Microwave
JEONG, BYEORI; YOON, SOOHYUK; CHUN, YOUNGNAM;

Abstract
A characteristics of microwave drying-gasification was analyzed for converting a dewatered sewage sludge generated a wastewater treatment plant. Gas (60%) was the largest component of the product of microwave gasification, followed by sludge char (33%) and tar (2%). The main components of the producer gas were hydrogen (33%) and carbon monoxide (40%), and there was some methane and hydrocarbons ($\small{C_2H_4}$, $\small{C_2H_6}$, $\small{C_3H_8}$). Larger nitrogen and smaller oxygen amounts were generated. Gravimetric tar generated $\small{414g/m^3}$. This means a total tar which is a heavy hydrocarbons from the volatile organic substance in the sewage sludge. Selected light tars were benzene, anthracene, naphthalene, pyrene, showing lower concentrations as 2.62, 0.37, 0.49, $\small{0.28g/m^3}$, respectively. Sludge char has larger meso pores which is a mean pore size of $\small{50.85{\AA}}$ and has high adsorptivity. An amount of adsorption was $\small{228.71cm^3/g}$, showing higher quantity than acommercial adsorbers. This indicates that the gas obtained from the microwave gasification of wet sewage sludge can be used as fuel, but the heavy tar in the gas must be treated. Sludge char can be used as a tar reduction adsorbent in the process, and then burns as a solid fuel.
Keywords
Microwave gasification;Producer gas;Light tar;sludge char;dewatered sludge;
Language
Korean
Cited by
References
1.
J. A. Menendez, A. Dominguez,, M. Inguanzo, and J. J. Pis, "Microwave-induced drying, pyrolysis and gasification (MWDPG) of sewage sludge: Vitrification of the solid residue", Journal of Analytical and Applied Pyrolysis, Vol. 74, No. 1, 2005, pp. 406-412.

2.
G. Gasco, C. G. Blanco, F. Guerrero, and A. M. Mendez Lazaro, "The influence of organic matter on sewage sludge pyrolysis.", Journal of Analytical and Applied Pyrolysis, Vol. 74, No. 1-2, 2005, pp. 413-420.

3.
W. Zuo, Y. Tian, and N. Ren, "The important role of microwave receptors in bio-fuel production by microwave-induced pyrolysis of sewage sludge.", Waste Management, Vol. 31, No. 6, 2011, pp. 1321-1326.

4.
J. A. Menendez, A. Dominguez, M. Inguanzo, and J. J. Pis, "Microwave pyrolysis of sewage sludge: analysis of the gas fraction.", Journal of Analytical and Applied Pyrolysis, Vol. 71, No. 2, 2004, pp. 657-667.

5.
T. Phuphuakrat, T. Namioka, and K. Yoshikawa, "Tar removal from biomass pyrolysis gas in two-step function of decomposition and adsorption", Applied Energy, Vol. 87, 2010, pp. 2203-2211.

6.
S. C. Kim, M. S. Lim, and Y. N. Chun, "Hydrogen-rich gas production from a biomass pyrolysis gas by using a plasmatron", International Journal of Hydrogen Energy, Vol. 38, 2013, pp. 14458-14466.

7.
B. B. January, D. B. Jurand, and M. Beata, "Research on Possibilities of Sewage Sludge Utilisation in the Process of Pyrolysis", Thermal Solid Waste Utilisation in Regular and Industrial Facilities, Vol. 58, 2000, pp. 103-111.

8.
Z. Xiqiang, Z. Jian, S. Zhanlong, L. Hongzhen, and L. Longzhi, and M. Chunyuan, "Microwave pyrolysis of straw bale and energy balance analysis", Journal of Analytical and Applied Pyrolysis, Vol. 92, No. 1, 2011, pp. 43-49.

9.
S. Lilly, and Z. Dong-Ke, "An experimental study of oil recovery from sewage sludge by lowtemperature pyrolysis in a fluidised bed", Fuel, Vol. 82, 2003, pp. 465-472.

10.
A. Dominguez, Y. Fernandez, B. Fidalogo, J. J. Pis, and J. A. Menendez, "Bio-syngas production with low concentration of \$CO_2\$ and \$CH_4\$ from microwave induced pyrolysis of wet and dried sewage sludge", Chemosphere, Vol. 70, 2008, pp. 397-403.

11.
M. Aznar, M. S. Anselmo, J. J. Manya, and M. B. Murillo, "Experimental Study Examining the Evolution of Nitrogen Compounds during the Gasification of Dried Sewage Sludge", Energy & Fuels, Vol. 23, No. 6, 2009, pp. 3236-3245.

12.
G. Q. Lu, "Effect of Pre-Drying on the Pore Structure Development of Sewage Sludge during Pyrolysis", Environmental Technology, Vol. 16, No. 5, 1995, pp. 495-499.