energy dr sanja gunawardena
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Biochemical Process Options for Biofuel Production
Sanja Gunawardena
Energy Balance 2014
Total Energy Demand 2014 (PJ)
Fuel woodBagasse
Imported petroleum products
Fuel wood
Biomass• Energy Plantations - Short Rotation Coppicing– Gliricidia Sepium (20- 30 tons/ Ha/yr)
BiogasMunicipal solid wastes in to biogas• Daily generation 6400 tonnes • 3400 tonnes are collected by LA’s• High organic content in MSW• High moisture content (70–80% on a wet mass basis)• Low calorific value (about 600– 1000 kcal/kg)
BiogasDigesters
Bioethanol Feedstock - molasses Bioethanol production is well established In 2014, only 9.2% of the sugar demand was locally
produced More than 90% of sugar is imported
(2014 - 520 000 MT)
Way forward…..
Development of sugarcane varieties with • high cane and sugar yields• drought resistant • tolerant/resistant to pests and diseases• desirable features for cultivation in different
sugarcane-growing areas
Different Biomass feed stocks into Bioethanol
Sugar platformSugar Fermentable sugar juice ethanol
Starch starch enzyme sugar ethanol
Lignocellulose Cellulose cellulase sugar ethanol
Lignocellulosic bioethanol
Simultaneous Saccharification and Fermentation (SSF)
Recent biotech advances in enzyme technology: Significant cost reductions
Biodiesel potential in Sri Lanka ??
Rubber seed oilJatropha oil
Waste Cooking oilAnimal fat
Rubber seed oil potential in Sri Lanka• Sri Lanka has 119,500 ha of rubber plantation• Seeds from 400 ha is sufficient for nurseriesIf• 75% of the Rubber seeds is collected • extracted (with a 20% efficiency)• and converted into biodiesel (with a 65 % efficiency)
around 5000 tons of biodiesel can be produced annually
• This is an equivalent of 4500 tons of petroleum diesel • Which is 0.2% of the total diesel consumption in the country or• 12% of the fuel consumption in the railway sector alone.
Jatropha potential in Sri Lanka
• Many entrepreneurs started growing Jatropha in the country
• No recorded information on the extent
UK’s first large-scale biodiesel plant in Scotland started production of biodiesel way back in March 2005
• Biodiesel from tallow and used cooking oil• The plant is capable of using a wide variety of raw materials including virgin oils such as rapeseed oil.
Waste cooking oilAnimal fat ?
Algae for Biodiesel Production
• Micro algal Farming Using Wastewater • Marine micro algae
Household Commercial and other• Biomass• Biogas
Industry• Biomass• Biogas• Liquid biofuels (biodiesel)
Transport• Biogas• Bioethanol• Biodiesel
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