Coal bed methane (CBM) obtained in the deep unmined coal reserves stands as a promising alternati... more Coal bed methane (CBM) obtained in the deep unmined coal reserves stands as a promising alternative source of energy for the diversified energy needs. Biogenic methane can consist of the significant portion of the gas from the coal beds as a result of microbial activity on the coal. The growing interest of enhancing the CBM production led to obtain the detailed information of the microbes and the development of a suitable microbial consortium capable of biotransforming coal to methane from the coal dust and the selectively enriched sump sediment water of the underground coal mines of the Jharia basin in the present study for the first time. The change of zeta potential from −40.6 to −8.3 mV indicated the probable modification of coal structure by the microbes. The collected subbituminous pure coal revealed a decrease in carbon content from 60.33% to 54.22% when inoculated with the enriched sump sediment water. The growth studies indicated significant microbial growth in the medium with C:N ratio (100:25), under anaerobic conditions. An increased methane production of 2.7 times was observed from the enriched sump sediment water as compared to coal dust inoculum. The prevalence of Firmicutes, Proteobacteria and the hydrogenotrophic methanogens was obtained in the coal dust and enriched sump sediment metagenomes via MG RAST server. The functional attributes obtained through SEED subsystem revealed the predominance of the monoaromatic and aliphatic compound degradation in both the metagenomes. This study aims to develop a microbial consortium through selective enrichment followed by the media amendment with the pre-digested organic nitrogen source for an enhanced coal biomethanation which can be applied to the unexplored and unmined coal seams of medium to low grade as an alternative form of energy.
Coal is a pre-dominant source of energy in India, coming both from surface (70%) and underground ... more Coal is a pre-dominant source of energy in India, coming both from surface (70%) and underground mining (30%) activities. But currently efforts are devoted to extract energy which is deposited in form of unmineable as well as abundant reserve for the purpose of growing energy demand as well as environmental stringency for and to utilize full reserve without disturbing the surface features. Coal is capable of act as reservoir where both where both thermogenic and biogenic methane is stored predominantly in an adsorbed state. Due to its inherent chemical complexity, coal is far from an ideal substrate for methanogenic fermentation processes. Hence, this study demonstrates the coal rank to be sub bituminous.
Coal bed methane (CBM) obtained in the deep unmined coal reserves stands as a promising alternati... more Coal bed methane (CBM) obtained in the deep unmined coal reserves stands as a promising alternative source of energy for the diversified energy needs. Biogenic methane can consist of the significant portion of the gas from the coal beds as a result of microbial activity on the coal. The growing interest of enhancing the CBM production led to obtain the detailed information of the microbes and the development of a suitable microbial consortium capable of biotransforming coal to methane from the coal dust and the selectively enriched sump sediment water of the underground coal mines of the Jharia basin in the present study for the first time. The change of zeta potential from −40.6 to −8.3 mV indicated the probable modification of coal structure by the microbes. The collected subbituminous pure coal revealed a decrease in carbon content from 60.33% to 54.22% when inoculated with the enriched sump sediment water. The growth studies indicated significant microbial growth in the medium with C:N ratio (100:25), under anaerobic conditions. An increased methane production of 2.7 times was observed from the enriched sump sediment water as compared to coal dust inoculum. The prevalence of Firmicutes, Proteobacteria and the hydrogenotrophic methanogens was obtained in the coal dust and enriched sump sediment metagenomes via MG RAST server. The functional attributes obtained through SEED subsystem revealed the predominance of the monoaromatic and aliphatic compound degradation in both the metagenomes. This study aims to develop a microbial consortium through selective enrichment followed by the media amendment with the pre-digested organic nitrogen source for an enhanced coal biomethanation which can be applied to the unexplored and unmined coal seams of medium to low grade as an alternative form of energy.
Coal is a pre-dominant source of energy in India, coming both from surface (70%) and underground ... more Coal is a pre-dominant source of energy in India, coming both from surface (70%) and underground mining (30%) activities. But currently efforts are devoted to extract energy which is deposited in form of unmineable as well as abundant reserve for the purpose of growing energy demand as well as environmental stringency for and to utilize full reserve without disturbing the surface features. Coal is capable of act as reservoir where both where both thermogenic and biogenic methane is stored predominantly in an adsorbed state. Due to its inherent chemical complexity, coal is far from an ideal substrate for methanogenic fermentation processes. Hence, this study demonstrates the coal rank to be sub bituminous.
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Papers by Sujit Ghosh