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- W1585411000 abstract "Aim: Bioaugumentation of low temperature biogas production was attempted by addition of cold‐adapted Clostridium and a methanogen. Methods and Results: A psychrotrophic xylanolytic acetogenic strain Clostridium sp. PXYL1 growing optimally at 20°C and pH 5·3 and a Methanosarcina strain, PMET1, growing optimally on acetate and producing methane at 15°C were isolated from a cattle manure digester. Anaerobic conversion of xylose at 15°C with the coculture of the two strains was performed, and batch culture methane production characteristics indicated that methanogenesis occurred via acetate through ‘acetoclastic’ pathway. Stimulation studies were also undertaken to evaluate the effect of exogenous addition of the coculture on biogas yields at 15°C. Addition of 3 ml of PXYL1 at the rate of 12 × 102 CFU ml−1 increased the biogas 1·7‐fold (33 l per kg cowdung) when compared to control (19·3 l per kg cowdung) as well as increased the volatile fatty acid (VFA) levels to 3210 mg l−1 when compared to 1140 mg l−1 in controls. Exogenous of addition of 10 ml PMET1 inoculum at the rate of 6·8 ± 102 CFU ml−1 in addition to PXYL1 served to further improve the biogas yields to 46 l kg−1 as well as significantly brought down the VFA levels to 1350 mg l−1. Conclusions: Our results suggest that the rate‐limiting methanogenic step at low temperatures could be overcome and that biogas yields improved by manipulating the population of the acetoclastic methanogens. Significance and Impact of the Study: Stimulation of biomethanation at low temperature by coculture." @default.
- W1585411000 created "2016-06-24" @default.
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- W1585411000 date "2010-01-01" @default.
- W1585411000 modified "2023-09-27" @default.
- W1585411000 title "Stimulation of biomethanation by Clostridium sp. PXYL1 in coculture with a Methanosarcina strain PMET1 at psychrophilic temperatures" @default.
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- W1585411000 doi "https://doi.org/10.1111/j.1365-2672.2009.04412.x" @default.
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