Organic Waste Recycling

Biofuels production 211

Figure 4.24 Ethanol production from cassava

Because ethanol distillation and drying require capital investment and are
energy intensive, more research in these areas should be undertaken to reduce
the cost of ethanol production and make it economically feasible for wider
applications.

1. Cassava


2. Distillation process


3. Mixture fermented with yeast
   to change sugars to ethanol


4. Enzyme added to change
   carbohydrates to sugars


5. Finely ground cassava


6. Skins peeled off and
   cassava washed with clean
   water

Composting

Fertilizer

Ethanol

Ethanol 99.5% Waste liquid

Sludge

Animal foods

Anaerobic digestion

Fertilizer

Biogas Energy