Methanogenesis mediated by methylotrophic mixed culture

Lalitha, K.; Swaminathan, K.; Vargheese, C. M.; Shanthi, V.; Bai, Ru

doi:10.1007/bf02788546

Cited by 6 publications

(1 citation statement)

References 32 publications

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“…Phototrophic bacteria, acetogens and methanogens are all anaerobes, and together, they form an ecosystem in natural anaerobic environments. Methane fermentation and phototrophic bacterial growth in an anaerobic digester were reported to be inversely related under light conditions (Lalitha et al, 1994). We found that the growth of phototrophic bacteria was induced from UASB granules under anaerobic light and sulfate-poor conditions, and studied the lighted upflow anaerobic sludge blanket (LUASB) method (Sawayama et al, 1999b).…”

Section: Introductionmentioning

confidence: 99%

Removal of 3-chlorobenzoate using an upflow anaerobic sludge blanket reactor under light conditions

Sawayama

Tsukahara

Yagishita

2002

Water Science and Technology

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The possibility of 3-chlorobenzoate removal from water using an upflow anaerobic sludge blanket (UASB) reactor without the addition of any extra dechlorinating culture under light conditions has been studied on a laboratory scale. Benzoate removal was observed in the first three months of operation under light conditions, but the 3-chlorobenzoate removal was not observed. After three months of operation under light conditions, the 3-chlorobenzoate concentration in the UASB reactor effluent gradually decreased to less than 1 mg x h(-1). The 3-chlorobenzoate concentration in the effluent did not increase under dark conditions. The DOC concentration in the effluent decreased according to the removal of the 3-chlorobenzoate by the UASB granules. These results indicated that granules in the UASB reactor provided the 3-chlorobenzoate removability after 80-100 d of adaptation to the 3-chlorobenzoate, and that the UASB reactor is useful for 3-chlorobenzoate removal.

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Section: Introductionmentioning

confidence: 99%

Removal of 3-chlorobenzoate using an upflow anaerobic sludge blanket reactor under light conditions

Sawayama

Tsukahara

Yagishita

2002

Water Science and Technology

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Metabolic characteristics of an aerobe isolated from a methylotrophic methanogenic enrichment culture

2003

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An anaerobic methylotrophic methanogenic enrichment culture, with sustained metabolic characteristics, including that of methanation for over a decade, was the choice of the present study on interspecies interactions. Growth and methanation by the enrichment were suppressed in the presence of antibiotics, and no methanogen grown on methanol could be isolated using stringent techniques. The present study confirmed syntrophic metabolic interactions in this enrichment with the isolation of a strain of Pseudomonas sp. The organism had characteristic metabolic versatility in metabolizing a variety of substrates including alcohols, aliphatic acids, amino acids, and sugars. Anaerobic growth was favoured with nitrate in the growth medium. Cells grown anaerobically with methanol, revealed maximal nitrate reductase activity. Constitutive oxidative activity of the membrane system emerged from the high-specific oxygen uptake and nitrate reductase activities of the aerobically and anerobically grown cells respectively. Cells grown anaerobically on various alcohols effectively oxidized methanol in the presence of flavins, cofactor FAD and the methanogenic cofactor F420, suggesting a constitutive alcohol oxidizing capacity. In cells grown anaerobically on methanol, the rate of methanol oxidation with F420 was three times that of FAD. Efficient utilization of alcohols in the presence of F420 is a novel feature of the present study. The results suggest that utilization of methanol by the mixed culture would involve metabolic interactions between the Pseudomonas sp. and the methanogen(s). Methylotrophic, methanogenic partnership involving an aerobe is a novel feature hitherto unreported among anaerobic syntrophic associations and is of ecological significance

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Shedding light on biogas: Phototrophic biofilms in anaerobic digesters hold potential for improved biogas production

Abendroth

Latorre‐Pérez²,

Porcar

et al. 2020

Systematic and Applied Microbiology

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Methanogenesis mediated by methylotrophic mixed culture

Cited by 6 publications

References 32 publications

Removal of 3-chlorobenzoate using an upflow anaerobic sludge blanket reactor under light conditions

Removal of 3-chlorobenzoate using an upflow anaerobic sludge blanket reactor under light conditions

Metabolic characteristics of an aerobe isolated from a methylotrophic methanogenic enrichment culture

Shedding light on biogas: Phototrophic biofilms in anaerobic digesters hold potential for improved biogas production

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