**7. Environmental advantages of algal biofuels**

In order to be a viable alternative energy source, a biofuel should provide a net energy gain, have environmental benefits, be economically competitive and be producible in large quantities without reducing food supplies [Hill, 2006]. In the subsections below we illustrate how the use of microalgae as feedstocks for biodiesel production can provide significant environmental benefits by reducing the land, pollutant and water footprints of biofuel production.

#### **7.1 Advantages of biodiesel from algae oil (Table 3)**








In order to be a viable alternative energy source, a biofuel should provide a net energy gain, have environmental benefits, be economically competitive and be producible in large quantities without reducing food supplies [Hill, 2006]. In the subsections below we illustrate how the use of microalgae as feedstocks for biodiesel production can provide significant environmental benefits by reducing the land, pollutant and water footprints of biofuel

additives, aquaculture, and pollution prevention [Raja *et al*., 2008].



3, PO-34, making algae to grow using

Some possibilities currently being considered are listed below.

Wastewater treatment by removal of NH+4, NO-

chemicals and biomass [Raja *et al*., 2008].

**7. Environmental advantages of algal biofuels** 

**7.1 Advantages of biodiesel from algae oil (Table 3)** 



freshwater.

production.





these water contaminants as nutrients [Wang *et al*., 2008].

energy cogeneration (electricity and heat) [Wang *et al*., 2008];

#### **7.2 Disadvantages of biodiesel from algae oil**



Table 3. Advantage and disadvantage of algae as biodiesel source compared with bacteria, yeast and waste oils
