GATE 2019 Civil Engineering Q41

Question

Raw municipal solid waste (MSW) collected from a city contains 70% decomposable material that can be converted to methane. The water content of the decomposable material is 35%. An elemental analysis of the decomposable material yields the following mass percent.
C:H:O:N: other = 44:6:43:0.8: 6.2
The methane production of the decomposable material is governed by the following stoichiometric relation
CaHbOcNd + nH2O → mCH4 + SCO2 + NH3
Given atomic weights: C = 12, H = 1, O = 16, N = 14. The mass of methane produced (in grams, round off to 1 decimal place) per kg of raw MSW will be _________

Accepted Answer

135.0 to 140.0