Methane losses from floating gasholder type biogas plants in relation to global warming
Year: 2004
Type: article
Abstract: Methane losses from uncovered portion of cattle dung slurry in biogas plant of various capacities (3, 6, 9, and 85 m 3 ) are measured using closed chamber method. Measurements are conducted from January to December 2002 during a year. Mean methane flux from different exposed areas of a biogas plant of 3 m3 capacity are: (i) Inlet/outlet pipes; 70 g/m 2 /d, (ii) Around gasholder; 87 g/m 2 /d, and (iii) Slurry tank; 41 g/m 2 /d, and increased by 15-20 per cent with the increase in plant capacity to 85 m 3 . Seasonal variation of slurry temperature strongly affects the methane emission. Emission rates during the summer are found to be high (125, 179, 230 and 230 g/m 2 /d, respectively, from the holder side of 3, 6, 9, and 85 m 3 ) at slurry temperatures near optimum mesophilic range (32° C during June) and drop down considerably (68 to 79 per cent) during winter at slurry temperatures in the lower psychrophilic range (13°C in December). The correlation coefficient between the CH 4 flux and the slurry temperature is found to be positive (between 0.90 and 0.96) and significant.
Authors: R. S. Khoiyangbam, Sushil Kumar, M. C. Jain
Language: English
Field: Energy
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W2497944161