Biodesulphurisation of high sulphur coal by heap leaching

Desulfurization of Selected Hard and Brown Coal Samples from India and Indonesia withRalstonia SpandPseudoxanthomonas sp

“…Major enzymatic system which is involved in the metabolism of organic sulfur needs to be fully understood which requires more research. The microbial desulfurization may be enhanced to commercial scale with the help of mesophiles (Cara et al, 2005;Chandra and Mishra, 1990;Pandey et al, 2005;Stevens et al, 1987;Chang and Myerson, 1982). In the present investigation two acidophilic bacteria, Ralstonia sp.…”

“…Being ecofriendly in nature and cost effective the biodesulfurization technology offers many advantages over the conventional physical and chemical processes. Useful contributions have been made by a number of researchers (Acharya et al, 2001;Cara et al, 2005;Chandra and Mishra, 1990;Pandey et al, 2005;Stevens et al, 1987).…”

Comparison Analysis of Coal Biodesulfurization and Coal’s Pyrite Bioleaching with Acidithiobacillus ferrooxidans

“…The biodesulfurization processes were carried out in 250 mL flasks with 100 mL basic salt medium, 10% W/V pulp density, particle size of −65 Tyler mesh, and the initial cell concentration was 1.0 × 10 6 cells·mL −1 , and processing time of 24 d. Every four days, the pH values, Eh (oxidation potential), and total iron concentration of biodesulfurization system were determined. At the end of the experiments, the residual coal samples were prepared with the method mentioned in the literature [ 23 ], and the proximate analysis, total sulfur, and the relative sulfur contents in the coal samples were then measured as the method mentioned in Section 2.1 . For pyrite bioleaching experiments, 250 mL flasks containing 100 mL sterilized culture medium and 1.0 g pyrite (particle size of −65 Tyler mesh) were incubated with cells (the initial cells concentration 1.0 × 10 6 cells/mL) on a rotary shaker at 170 rpm, 30°C.…”

Biodegradation of dibenzothiophene and its application in the production of clean coal

“…Heap leaching has been carried out for semi-anthracite coal obtained from S.A Hullera Vasco-Leonesa industrial plant, which resulted in total sulphur removal of 23% and pyritic sulphur removal of 39% [184]. Currenly, heap leaching using microbial approach is gaining a lot of importance in scaleup biotechnologies in the mineral processing sector [185].…”