In a city, the chemical formula of biodegradable fraction of municipal solid waste (MSW) is C100H250O80N. The waste has to be treated by forced-aeration composting process for which air requirement has to be estimated.Assume oxygen in air (by weight) = 23 %, and density of air = 1.3 kg/m3. Atomic mass: C = 12, H = 1, O = 16, N = 14.C and H are oxidized completely whereas N is converted only into NH3 during oxidation.For oxidative degradation of 1 tonne of the waste, the required theoretical volume of air (in m3/tonne) will be (round off to the nearest integer)

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GATE Civil Engineering (CE) 2022 Shift 2 Solved Paper

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