Desulfurization of dibenzothiophene (DBT) by a novel strain Lysinibacillus sphaericus DMT-7 isolated from diesel contaminated soil

Bahuguna, Ashutosh; Lily, Madhuri Kaushish; Munjal, Ashok; Singh, Ravindra; Dangwal, Koushalya

doi:10.1016/s1001-0742(10)60504-9

Cited by 68 publications

(32 citation statements)

References 38 publications

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“…Lysinibacillus sphaericus had been isolated in microorganisms obtained from soil or activated sludge. They frequently appear during ethanethiol treatment or other desulfurization process of other sulfur compounds [29][30][31]. Because of their capability to biodegrade organic sulfur compounds and hazardous substances, Bacillus cereus, Bacillus firmus, and other Bacillus sp.…”

Section: Microbial Characteristics In the Individual Zonementioning

confidence: 99%

Operational aspects of SO2 removal and microbial population in an integrated-bioreactor with two bioreaction zones

Yang

Lin

et al. 2016

Bioprocess Biosyst Eng

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An integrated-bioreactor, which consisted of a suspended zone and an immobilized zone, was applied to treat gases containing SO 2 . The removal of SO 2 in suspended zone differed slightly from that in immobilized zone. The influences of operational aspects such as SO 2 load, temperature, and pH on integrated-bioreactor performance and bacterial community composition were investigated. The synergistic action of the two zones led to effective reduction of SO 2 , and the total removal efficiencies with the inlet concentration of 91-117 mg/m 3 , were over 85 % in steady state. Paenibacillus sp. and Lysinibacillus sp. dominated both zones as desulfurization bacteria. Results of polymerase chain reaction-denaturing gradient gel electrophoresis followed by clone library analysis indicated that temporal shifts in bacterial community composition in both zones developed differently. Differences in the concentration of introduced SO 2 and supported mode of microorganisms for survival, confirmed that bacterial community composition and abundance significantly differed among individual zones.

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Section: Microbial Characteristics In the Individual Zonementioning

confidence: 99%

Operational aspects of SO2 removal and microbial population in an integrated-bioreactor with two bioreaction zones

Yang

Lin

et al. 2016

Bioprocess Biosyst Eng

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“…As shown in Table 3, the bacterial clone library of day 60 was highly dominated with the clones affiliated with the phylum Firmicutes (67.5%), with the L. sphaericus-like OTU as the largest single group (36%). A recent work [36] revealed that a novel strain L. sphaericus DMT-7 could serve as model system for the efficient biodesulfurization of diesel and petrol. Another dichloromethane (DCM)-degrading organism L. sphaericus strain wh22 which can be isolated from pharmaceutical wastewater sludge was reported by Wu et al [37].…”

Section: Characteristics Of Microbial Community Structuresmentioning

confidence: 99%

UASB treatment of chemical synthesis-based pharmaceutical wastewater containing rich organic sulfur compounds and sulfate and associated microbial characteristics

Niu

Zhang

et al. 2015

Chemical Engineering Journal

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h i g h l i g h t sSuccessful application of UASB in treatment of rich organic S-bearing wastewater. Sulfate in effluent was higher than influent at COD/SO 4 2À ratio of 8 and 5.Conversely, sulfate in influent was higher than effluent at COD/SO 4 2À ratio of 1.5.Archaea and bacterial community varied greatly with altered OLR. Some species can be responsible for S release from organic sulfur compounds.a r t i c l e i n f o a b s t r a c tThe feasibility of treating of chemical synthesis-based pharmaceutical wastewater containing rich organic sulfur compounds and sulfate using an upflow anaerobic sludge blanket (UASB) was investigated. The initial COD/SO 4 2À ratio of 8 in the wastewater varied from 5 to 1.5 after adding sulfate. Of interest that under the condition of COD/SO 4 2À at 8 and 5, despite the simultaneous generation of sulfide and hydrogen sulfide, the sulfate concentration in the effluent was higher than in the influent. This is due to the sulfur release in the form of sulfate during the degradation of these organic sulfur compounds in this reactor. Conversely, at COD/SO 4 2À of 1.5, influent sulfate was higher than effluent sulfate due to reduction of more sulfates in the reactor. At COD/SO 4 2À of 8, for practical application, the optimum OLR was found to be 8 kg COD/m 3 /d, where a nearly 70% COD reduction occurred with biogas containing 63% methane. In this stage, the distribution of the archaea and bacterial community varied greatly with altered OLR (accompanied with prolonged operation time). Some species, such as Lysinibacillus sphaericus, Clostridium cellulovorans were expected to be partly responsible for S release from some organic sulfur compounds in the reactor. By increasing the sulfate loading at a COD/SO 4 2À ratio up to 1.5 resulted in a light inhibition of methanogenesis due to the high sulfide concentration (1212 SO 4 2À -S mg/L) with no obvious suppression of sulfidogenesis.

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“…Prokaryotic organisms that desulfurise organosulfur compounds without metabolizing the carbon skeleton are uncommon and are usually used in ways that seek to oxidize sulfur selectively [5][6][7][8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Reduction in the Sulfur Content of Fossil Fuels by Cunninghamella elegans (UCP 0596) to Dibenzothiophene Compound

Souza¹,

Silva²,

Lima³

et al. 2018

Recent Insights in Petroleum Science and Engineering

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Biodesulfurization (BDS) is one of the most promising technologies used together with traditional hydrodesulfurization (HDS) to reduce the sulfur content of fossil fuels. In this research study, a strain of Cunninghamella elegans (UCP 596) was isolated from mangrove sediments to metabolize an organosulfur dibenzothiophene (DBT) compound in the concentrations of 0.5 and 1 mM and transform to DBT sulfone (DBT-5-dioxide), followed by dibenzothiophene 5,5-dioxide and 2-hydroxybiphenyl metabolites, thus suggesting the use of the "4S" metabolic pathway. The fungus also degraded the DBT completely in the first 24 h of growth on a 2.0 mM DBT concentration by angular deoxygenation, which suggests that a new second metabolic pathway was used. The DBT was consumed as the carbon source, and the sulfur was removed in the form of sulfite ion. A new product, benzoic acid, was formed at the end of the catabolism of DBT by C. elegans using an angular route.

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Desulfurization of dibenzothiophene (DBT) by a novel strain Lysinibacillus sphaericus DMT-7 isolated from diesel contaminated soil

Cited by 68 publications

References 38 publications

Operational aspects of SO2 removal and microbial population in an integrated-bioreactor with two bioreaction zones

Operational aspects of SO2 removal and microbial population in an integrated-bioreactor with two bioreaction zones

UASB treatment of chemical synthesis-based pharmaceutical wastewater containing rich organic sulfur compounds and sulfate and associated microbial characteristics

Reduction in the Sulfur Content of Fossil Fuels by Cunninghamella elegans (UCP 0596) to Dibenzothiophene Compound

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