Table 1
Advantages and disadvantages of various biodiesel generations [12].
Biodiesel generation |
Advantages |
Disadvantages |
1st generation biodiesel |
-
Low emission of greenhouse gas.
-
Easy and low-cost technology for conversion.
|
-
Yield is inadequate to meet the demand.
-
Causes food shortage.
-
High land footprint.
|
2nd generation biodiesel |
-
Using food waste as a feedstock.
-
Use of non-agricultural land to grow a limited amount of crops.
|
-
Costly pre-treatment.
-
Sophisticated technology is used to transform biomass into fuel.
|
3rd generation biodiesel |
-
Simple to grow algae.
-
No competition for the use of food crops: wastewater, seawater can be used.
|
-
More resources usage for algae cultivation.
-
Low lipid level or biomass accumulation in algae.
|
4th generation biodiesel |
-
High biomass and production yield.
-
More capability to eliminate CO2.
|
-
The cost of the bio-reactor is higher.
-
At the early stage of research, the high investment needed.
|