Microbial desulfurization of three different coals from Indonesia, China and Korea in varying growth medium

Kim, Dong-Jin; Gahan, Chandra Sekhar; Akilan, Chandrika; Choi, Sehoon; Kim, Byoung-Gon

doi:10.1007/s11814-012-0168-z

Cited by 6 publications

(7 citation statements)

References 25 publications

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“…All the experiments were carried out in controlled pH conditions of 1. 4 2− + 2H + (Eq. 4) Pyrite oxidation is an acid producing process and this helps in maintaining the pH in acidic conditions in which the bacteria thrive.…”

Section: Resultsmentioning

confidence: 99%

“…The increase in redox potential during biodepyritization of different type of coals has been reported in a previous study carried out using mesophilic At. ferrooxidans 4 . In the above study, a similar increase in redox potential was observed during biodepyritization of Indonesian, Chinese and Korean coal.…”

Section: Resultsmentioning

confidence: 99%

“…versus time mineral sulfi des. The maximum amount of SO 4 2-ion concentration estimated in the reactor was 15, 24.53 and 18.80 g L -1 for A1, A2 and A3, respectively. Therefore, it is to be noted that, the total amount SO 4 2-ion in the bioleaching solution is due to addition of sulphuric acid and also from the pyrite oxidation.…”

Section: Trend Of So 4 2-concentration and Microbial Population Durinmentioning

confidence: 93%

“…The microbial culture was a mixed culture of moderate thermophilic iron and sulphur-oxidizing bacteria. The microbial culture was grown in 9K medium supplemented with 4.5 g L -1 of iron (in the form of FeSO 4 . 7H 2 O) and 2mM of potassium tetrathionate at a pH -1.5 operated at 45°C, 280 RPM in a 1.5 L batch reactor with continuous supply of oxygen at a fl ow rate of 1 LPM.…”

Section: Microorganisms and Growth Conditionmentioning

confidence: 99%

“…Fig. 3a shows plot between SO 4 2-ion concentrations vs. time. It is believed that some of the sulphate ion could have precipitated as gypsum (CaSO 4 ) due to addition of Ca(OH) 2 into the reactor to maintain the pH at 1.5.…”

Section: Trend Of So 4 2-concentration and Microbial Population Durinmentioning

confidence: 99%

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Studies on the effect of coal particle size on biodepyritization of high sulfur coal in batch bioreactor

Singh

Srichandan

Pathak

et al. 2015

Polish Journal of Chemical Technology

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The moderate thermophilic mix culture bacteria were used to depyritize the Illinois coal of varying particle sizes (-100 μm, 100-200 μm, +200 μm). Mineral libration analysis showed the presence of pyrite along with other minerals in coal. Microbial depyritization of coal was carried out in stirred tank batch reactors in presence of an iron-free 9K medium. The results indicate that microbial depyritization of coal using moderate thermophiles is an effi cient process. Moreover, particle size of coal is an important parameter which affects the effi ciency of microbial depyritization process. At the end of the experiment, a maximum of 75% pyrite and 66% of pyritic sulphur were removed from the median particle size. The XRD analysis showed the absence of pyrite mineral in the treated coal sample. A good mass balance was also obtained with net loss of mass ranging from 5-9% showing the feasibility of the process for large scale applications.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Trend Of So 4 2-concentration and Microbial Population Durinmentioning

confidence: 93%

Section: Microorganisms and Growth Conditionmentioning

confidence: 99%

Section: Trend Of So 4 2-concentration and Microbial Population Durinmentioning

confidence: 99%

See 3 more Smart Citations

Studies on the effect of coal particle size on biodepyritization of high sulfur coal in batch bioreactor

Singh

Srichandan

Pathak

et al. 2015

Polish Journal of Chemical Technology

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Characterization of bio-coal briquettes blended from low quality coal and biomass waste treated by Garant® bio-activator and its application for fuel combustion

Mursito

Widodo

Arifin

2020

Int J Coal Sci Technol

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Experimental research was carried out on the manufacturing of bio-coal briquettes from a blend of two different types of low-quality coal and biomass waste in the absence of coal carbonization, where the third blend of the material was fermented by adding a bio-activator solution before pressurizing the components into briquettes. The coal samples from Caringin-Garut Regency (BB-Garut) had a low calorific value and a high sulfur content (6.57 wt%), whereas the coal samples from Bayah-Lebak Regency (BB-Bayah) had a higher calorific value and a lower sulfur content (0.51 wt%). The biomass added to the coal blend is in the form of fermented cow dung (Bio-Kohe), and it had a calorific value of 4192 kcal/ kg and a total sulfur content of 1.56 wt%. The main objective of this study is to determine the total decrease in the sulfur content in a blend of coal and biomass in which a fermentation process was carried out using a bio-activator for 24 h. The used bio-activator was made from GarantÒ (1:40) ? molasses 1 wt%/vol, and its used amount was 0.2 L/kg. Also, the total sulfur content in the blend was 1.00 wt%-1.14 wt%, which fulfills the necessary quality requirements for non-carbonized bio-coal briquettes. The pyritic and sulfate content in the raw coal was dominant, and the organic sulfur, when fermented with GarantÒ, was found to be less in the produced bio-coal briquettes by 38%-58%.

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Microbial Desulphurization of Low-Ranked Coal Using Pseudomonas aeruginosa

Shah,

Asadullah,

Qaisrani

et al. 2024

Chemistry Africa

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Microbial desulfurization of three different coals from Indonesia, China and Korea in varying growth medium

Cited by 6 publications

References 25 publications

Studies on the effect of coal particle size on biodepyritization of high sulfur coal in batch bioreactor

Studies on the effect of coal particle size on biodepyritization of high sulfur coal in batch bioreactor

Characterization of bio-coal briquettes blended from low quality coal and biomass waste treated by Garant® bio-activator and its application for fuel combustion

Microbial Desulphurization of Low-Ranked Coal Using Pseudomonas aeruginosa

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