Table 6 Comparative analysis of the total energy consumption and cost involved in both conventional and in situ transesterification processes
Technique and its unit involved | Conventional | In situ |
|---|---|---|
Biomass drying (Hot air oven) | 7.2 | 7.2 |
Cell disruption (Sonicator) | 61.2 | 61.2 |
Lipid extraction (Orbital shaker) | 140 | – |
Transesterification (Hot plate magnetic stirrer) | 4 | 6.85 |
Total energy consumption (kW h) | 212.4 | 75.25 |
Energy saved, % | 64.57 | |
Cost of electricity per unit (on average) | 5 | 5 |
Total cost to process 1 kg biomass (INR) | 1062 | 376.25 |
Cost saved per kg of biomass (INR) | 685.75 | |
Production cost per batch of ALB (INR) | 295.11 |