Combustion of coal create many harmful gases which effect on human health as well as on environment. The sulfur in coal limits its own use, and bio-desulfurization (BDS) shows enormous development potential and the prospects for the application of coal desulfurization. Present study highlights the bioprocess strategies for reduction of sulfur content from coal before combustion. The bioprocess involved the use of Airlift Bioreactor along with Rhodococcus sp. ATCC55309 as biocatalyst. Different nutritional and operational parameters involved to promote sulfur reduction at maximum level. The parameters were investigated are different carbon source, temperature, pH, Agitation speed, and pulp density. The impact of these parameters shows that sulfur removal can be enhanced though optimized conditions. The amount of total sulfur and organic sulfur present in coal were reduced by 33 ± 1.7% and 71 ± 1.5%, respectively, compared to untreated coal at controlled condition of various parameters are 20% (w/v) pulp density, 30 °C, 170 rpm, glucose as carbon source and pH 7. Whereas organic sulfur degrades from coal using Rhodococcus sp. ATCC55309 about 0.36 mM DBT (Di-benzothiophene) within 8 days via 4S-pathway. The maximum conversion of DBT compound into 2-HBP(2-hydroxybiphenyl) by utilizing 30 °C, 170 rpm, 20 pulp density and glucose as carbon source.

煤炭燃烧会产生许多有害气体，对人类健康和环境都有影响。煤炭中的硫限制了自身的使用，生物脱硫（BDS）显示出巨大的发展潜力和煤炭脱硫的应用前景。目前的研究强调了在燃烧前减少煤中硫含量的生物工艺策略。生物过程涉及使用气升式生物反应器和红球菌属. ATCC55309 作为生物催化剂。涉及不同的营养和操作参数，以最大程度地促进硫的减少。研究的参数是不同的碳源、温度、pH、搅拌速度和纸浆密度。这些参数的影响表明，通过优化条件可以提高硫去除率。与未经处理的煤相比，在各种参数的受控条件下，煤中总硫和有机硫的含量分别减少了 33 ± 1.7% 和 71 ± 1.5%，纸浆密度为 20% (w/v)，30 °C , 170 rpm, 葡萄糖作为碳源，pH 值为 7。 而使用红球菌属从煤中降解有机硫. ATCC55309 在 8 天内通过 4S 途径吸收约 0.36 mM DBT（二苯并噻吩）。利用30°C、170 rpm、20纸浆密度和葡萄糖作为碳源，DBT化合物最大转化为2-HBP（2-羟基联苯）。