# | 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/m [Fuel combustion energy for diesel is 35.8 MJ/lt [2] ] 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/m [Fuel combustion energy for diesel is 35.8 MJ/lt [2] ] 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 [13] | ||

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 [2] + 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 [3] + 0.93 MJ/kg = 3.43 MJ/kg |

5 | NaOH | Energy for the production of NaOH | - | 20.5 MJ/kg [4] |

6 | Na | Energy for the production of Na | - | 5.36 MJ/kg [5] |