Biological assisted organic sulfur removal from low rank indigenous coal using airlift bioreactor
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RESEARCH PAPER
Biological assisted organic sulfur removal from low rank indigenous coal using airlift bioreactor Abdul Sattar Jatoi1,2 · Shaheen Aziz1 · Suhail Ahmed Soomro1 Received: 8 June 2020 / Accepted: 24 September 2020 © Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract 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. Keywords Low rank coal · Bioreactor · DBT · BDS · Rhodococcus sp. ATCC55309 Abbreviations DBT Dibenzothiophene 2-HBP 2 -Hydroxybiphenyl BDS Biodesulfurization ALBR Airlift Bioreactor OD Optical Density
Introduction The primary resources used for the electricity production is coal, which supply 41% of electricity at global level [1], and is crucial for economic development [2]. Coal still remains one of the world’s essential fuels. In recent years, 93% of South Africa’s electric power comes from coal, 79% from * Abdul Sattar Jatoi [email protected] 1
Department of Chemical Engineering, Mehran University of Engineering and Technology, Jamshoro 76062, Sindh, Pakistan
Department of Chemical Engineering Dawood, University of Engineering and Technology, Karachi, Sindh, Pakistan
2
China, 78% from Australia, 68% from India, and 39% from the United States.[3, 4]. World largest consumer of coal is china which contributes 50% demand at global level. China exploited abundant coal revisor in different region including southwest, northwest, and south-central china, which are high in sulfur content [5]. Coal having sulfur content can be harmful, the gases generated after combustion toxic and acidic, which make acid rain and different problems related to health [2, 6] Average ranges of pH (3–4.5) for acid rain [7], that kill fish as well as damage buildings, related historic artif
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