GATE (CE) : ENVIRONMENTAL ENGINEERING #4 (App update required to attempt this test)

Determine quantity of air(m³) required to oxidize the waste of 500kg of MSW (C₆₀H₉₅O₄₀N) by composting. Use the following equation. (assume density = 1.2Kg/m³ & % oxygen in air to be 20.8%)?

C₆₀H₉₅O₄₀N + 63O₂→ 60CO₂ + 46H₂O + NH₃

A landfill is to be designed for the population of 2,00,000. The solid waste generation is 1 kg/person/day. The density of uncompacted fill is 100 kg/m³. The compaction ratio is 3 and volume of landfill is 0.020 km³. The ratio of cover to compacted fill is 0.4. Calculate the number of years this landfill can be used.

40 gm of CO₂ and 50 gm of CH₄ are produced from the composition of municipal waste with formula weight of 200 gm. What is the average per capita greenhouse gas production( in gm) in city of 12,00,000 population with 500gm/capita/day municipal waste generation.

A town of population 50,000 generates municipal solid waste of 500 gm/person/day. How many trucks would be needed to collect the waste twice the week? The trucks have the capacity of 4.5 tonnes and operates 5 day a week and truck can toe avg toe load of 75 % of its capacity.

A sewer of diameter 300 mm flowing at d/D = 0.3 on a grade ensuring a degree of self-cleansing equivalent to that obtained in a sewer of running full at a velocity at a rate of 0.9 m/sec. Find the required grade-----*10^-3 assuming n=0.013