{"title":"Effect of Pulp Density on Biodesulfurization of Mongolian Lignite Coal","authors":"Ashish Pathak, Dong-Jin Kim, Byoung-Gon Kim","volume":92,"journal":"International Journal of Environmental and Ecological Engineering","pagesStart":618,"pagesEnd":622,"ISSN":"1307-6892","URL":"https:\/\/publications.waset.org\/pdf\/10003942","abstract":"Biological processes based on oxidation of sulfur
\r\ncompounds by chemolithotrophic microorganisms are emerging as an
\r\nefficient and eco-friendly technique for removal of sulfur from the
\r\ncoal. In the present article, study was carried out to investigate the
\r\npotential of biodesulfurization process in removing the sulfur from
\r\nlignite coal sample collected from a Mongolian coal mine. The batch
\r\nbiodesulfurization experiments were conducted in 2.5 L borosilicate
\r\nbaffle type reactors at 35 ºC using Acidithiobacillus ferrooxidans.
\r\nThe effect of pulp density on efficiency of biodesulfurization was
\r\ninvestigated at different solids concentration (1-10%) of coal. The
\r\nresults of the present study suggested that the rate of desulfurization
\r\nwas retarded at higher coal pulp density. The optimum pulp density
\r\nfound 5% at which about 48% of the total sulfur was removed from
\r\nthe coal.","references":"[1] Gungor, A. \u201cPrediction of SO2 and NOx emissions for low grade Turkish\r\nlignites in CFB combustors\u201d Chemical Engineering Journal. Vol. 146, p.\r\n388-400, 2012.\r\n[2] Li, Z.L., Sun, T.H., Jia, J.P. \u201cAn extremely rapid, convenient and mild\r\ncoal desulfurization new process: sodium borohydride reduction\u201d Fuel\r\nProcessing Technology. Vol. 91 (9), p. 1162\u20131167, 2010.\r\n[3] Vaccaro, S. \u201cDemineralization and desulfurization process to generate\r\nclean coal\u201d Chemical Engineering Transactions. Vol. 21, p.1489-1494,\r\n2010.\r\n[4] Cardona, I.C., Marquez, M.A. \u201cBiodesulfurization of two Colombian\r\ncoals with native microorganisms\u201d Fuel Processing Technology. Vol. 90,\r\np. 1099-1106, 2009.\r\n[5] Aditiawati, P., Akhmaloka, Astuti, D.I., Sugilubin, Pikoli, M.R.\r\n\u201cBiodesulfurization of subbituminous coal by mixed culture bacteria\r\nisolated from coal mine soil of south Sumatra\u201d Biotechnology. Vol.\r\n12(1), p. 46-53, 2013.\r\n[6] Acharya, C., Kar, R., Sukla, L. \u201cBacterial removal of sulfur from three\r\ndifferent coals\u201d Fuel. Vol. 80, p. 2207-2216, 2001.\r\n[7] Golshani, T., Jorjani, E., Chelgani, S.C., Shafaei, S.Z., Nafechi, Y.H.\r\n\u201cModelling and process optimization for microbial desulfurization of\r\ncoal by using a two-level full factorial design\u201d International Journal of\r\nMining Science and Technology, Vol. 23(2), p. 261-265, 2013.\r\n[8] Larsson, R.T. Licentiate thesis. University of Lund, Lund, Swedan,\r\n1982.\r\n[9] Clark, T.R., Baldi, F., Olson, G.J. \u201cCoal depyritization by thermophilic\r\narchaeon metallosphaerasedula\u201d Applied and Environmental\r\nMicrobiology, Vol. 59 (8), p. 2375-2379, 1993.\r\n[10] Hu, J., Zheng, B., Finkleman, R.B., Wang, B., Wang, M., Li, S., Wu, D.\r\n\u201cConcentration and distribution of sixty-one elements in coals from DPR\r\nKorea\u201d. Fuel, Vol. 85, p.679-686, 2006.\r\n[11] Pandey, R.A., Raman, V.K., Bodkhe, S.Y., Handa, B.K., Bal, A.S.\r\n\u201cMicrobial desulphurization of coal containing pyritic sulphur in a\r\ncontinuously operated bench scale coal slurry reactor\u201d Fuel. Vol. 84, p.\r\n81-87, 2004.","publisher":"World Academy of Science, Engineering and Technology","index":"Open Science Index 92, 2014"}