关键词: 生物脱硫, 有机硫, 白腐真菌H.lixii AH, 单因素实验, 正交实验

Abstract:

In present work, white rot fungi Hyprocrea lixii AH as desulfurization microorganism was used to remove the organic sulfur in coal. Firstly, One-factor experimental designs were involved to estimate the factors as particle size, coal slurry concentration, inoculation concentration and pH value in biodesulfurization. The results showed that the optimal levels and corresponding desulfurization efficiency are particle size 0.125-0.25mm，18.6%; coal slurry concentration 10%，34.1%; inoculation concentration 10%，33.9% and pH value 7，33.8% , respectively. Then the orthogonal test design was used to optimize the conditions of biodesulfurization. The result showed that the optimal combination of conditions was coal slurry concentration 10%, particle size 0.125-0.25mm, inoculum size 10%, pH value 6.0, and corresponding desulfurization efficiency is 33.7%. Primary and secondary order of the various factors on the desulfurization efficiency from largest to smallest is particle size, coal slurry concentration, pH value and inoculation concentration. All the results showed that the way of removal the organic sulfur in coal with white rot fungi was feasible. Achieved results in these researches could provide preliminary experimental data for the application of this microorganism in biodesulfurization of organic sulfur in coal.

Key words: Biodesulfurization, Organic sulfur, White rot fungi H. lixii AH, One-factor experimental designs, Orthogonal test