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Biodiesel from Microalgae
Transcript of Biodiesel from Microalgae
Supervisors – Professor Kamau, Dr. Mwaniki
Production of Biodiesel From Wastewater Microalgae
photosynthetic small sized organisms
Requires light, H20, and CO2
Grow on suspended bodies of water
Made of carbohydrates, proteins, nucleic acids and fats in varying amounts.
Microalgae contain high content of biooil
Gathered 12kg of dry biomass
Recovered 10 L Hexane
Produced 115 mL of Bioil
Obtained 400 mL of Biodiesel
Biooil is extracted from Plant biomass
Algae biooil has shown to have unparalleled yields compared to palm oil and jathropha
rapid growth rate
non-toxic and bio degradable
Doesn't compete with agriculture
Capture CO2 from environment and make oxygen
Soak in 18L Hexane for 24 hours
Filter Biomass from Hexane/Biooil
Separtate Biooil by distillation to recover Hexane
Use Methonol and Sodium Hydroxide to perform Transesterfication
Shake for 4 hours
let process settle for 19 hours
Separate Biodiesel from Glycerol
Alage Collection varied with time of day
Biooil could have azeotrope with hexane making distillation difficult
Calorific Value showed microalage is an efficient Sustainable Energy
Biomass residual left from the production of biodiesel at Raui are high in proteins, carbohydrates, and other nutrients
Research and Developments
Algae grown in wastewater environments have become the most attractive place for innovation and development.
Reduces heavy metals
Cost effective treatment
Reduce the Phosphorus and Nitrogen in water
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4. Shen, Y., Yuan, W., Pei, Z., Wu, Q., & Mao, E. (2009). Microalgae mass production methods . Algal Research , 4(52), 1275-1287.
5. Trent, J. (2012). Offshore Membrane Enclosure for Growing Algae. NASA OMEGA Brochure , 1(1), 2.
6. Becker, J. (1994). Properties of Algae. Basics of Algae, 1(1), 5.
To synthesize biodiesel from bio oil extracted from microalage at Raui.
To harvest algae from the waste water facility lagoons, extract biooil, convert it in to biodiesel via base catalyzed chemical esterfication
To determine the calorific value of biooil, biodiesel and biomass after oil extraction
Calculate the renewablity factor of biodiesel
Increase in global energy demand is up 37% since 2000
Presently fossil fuels account for more than 75% of the world’s energy
Estimated 81 years left on fossil fuel
Need a renewable energy source
Alage Overgrowth at Raui Waterwater Plant
Stains treated water effluent into Nairobi River
Reduces the Biological Oxygen Demand
Reduces ascetic plant efficiency
What Can NWC do with alage overgrowth?
Biooil And Biodiesel Production
Biodiesel surprisingly low calorific value when compared to biooil
Investigate the species of microalage at Ruai
Explore other methods of extraction
Test biodiesel Performance
Alage was collected using buckets
Microalage separated easily
Transferred into Potato Sacks to release excess
Nairobi Water and Sewerage Company can maximize efficiency by converting its algae into biodiesel
What is Microalage
Overgrowth of Algae mean larger land requirements, Oxygen depletion, and discoloration
Collection of alage need to be optimized
Recycling of hexane should not be the focus
Alage biooil has a high standard showing it can be highly profitable