# Process Operation Diesel/Electrical energy consumption Energy (MJ/kg) 1 Excavation of TBS Usually soil is excavated using diesel-operated excavators, which are typically operated over a shift of 8 hours per day. In 8 hours, the soil is excavated and loaded into a truck at the rate of 12 loads per hour for about 90 times into a truck of capacity 14.0 cum. Total output = 12 × 14 = 168 cum/hour Diesel consumption per hour = 30 liters. Therefore, diesel required per cum = 30/168 = 0.178 lt/cum Assuming bulk density of TBS is 1300 kg/m3 and [Fuel combustion energy for diesel is 35.8 MJ/lt  ] 0.029 MJ/kg Transportation of TBS Diesel required for transportation over a distance of approximately 50 km, at mileage of 5 km/lt: 50/5 = 10 liters (Assuming a truck load is equivalent to 11.0 cum) 10/11 = 0.91 lt/cum Total diesel required 1.087 lt/cum 2 Brick bats procurement from demolished buildings Assuming 50 cum debris can be extracted per day (8 hours working) using diesel operated hydraulic breakers/pneumatic breakers. Diesel consumption per hour = 30 liters. Diesel consumption = 240 lt/day and 240/50 = 4.8 lt/cum Assuming bulk density of brick-powder 1200 kg/m3 [Fuel combustion energy for diesel is 35.8 MJ/lt  ] 0.251 MJ/kg Transportation of bricks to crusher Diesel required for transportation of bricks from demolition site to crusher over a distance of approximately 20 km at mileage of 5 km/lt 20/5 = 4 liters (Assuming a truck load is equivalent to 11.0 cum) 4/11 = 0.36 lt/cum Total diesel required 5.16 lt/cum Primary & secondary crushing of bricks Energy required for primary and secondary crushing of bricks to a size less than 90 µ 0.0978 MJ/kg  3 Slaked lime Energy required for blending of 5 kg slaked lime with BP in wet grinder for 30 minutes. 375 Watt hour electrical energy is consumed. i.e. 375 × 12.44 = 4665/1000 = 4.665/5 = 0.93 MJ/kg 5.63 MJ/kg  + 0.93 MJ/kg = 6.56 MJ/kg 4 LPC Energy for inter-grinding of 5 kg of LPC + BP + TBS for 30 minutes in Ball mill. 375 Watt hour electrical energy is consumed i.e. 375 × 12.44 = 1350/1000 = 4.665/5 kg = 0.93 MJ/kg. 2.5 MJ/kg  + 0.93 MJ/kg = 3.43 MJ/kg 5 NaOH Energy for the production of NaOH - 20.5 MJ/kg  6 Na2SiO3 Energy for the production of Na2SiO3 - 5.36 MJ/kg