4. The following data are given for a family single stage biogas digester shown in Figure Q 4 suitable for the output of ten cows: the retention time is 50 days, temperature 30°C, dry matter consumed per day = 4kg, biogas yield is 0.48 m³ per kg. The efficiency of burner is 80%, methane proportion is 0.6, heat of combustion of methane =35 MJ/m³. The density of the dry material in the fluid is approximately 80 kg/m³ Calculate: (i) The volume of biogas digester (ii) The power available from the digester.

4. The following data are given for a family single stage biogas digester shown in Figure Q 4 suitable for the output of ten cows: the retention time is 50 days, temperature 30°C, dry matter consumed per day = 4kg, biogas yield is 0.48 m³ per kg. The efficiency of burner is 80%, methane proportion is 0.6, heat of combustion of methane =35 MJ/m³. The density of the dry material in the fluid is approximately 80 kg/m³ Calculate: (i) The volume of biogas digester (ii) The power available from the digester.

Chemistry by OpenStax (2015-05-04)

1st Edition

ISBN:9781938168390

Author:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser

Publisher:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser

Chapter5: Thermochemistry

Section: Chapter Questions

Problem 52E: Before the introduction of chlorofluorocarbons, sulfur dioxide (enthalpy of vaporization, 6.00...

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