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Biodiesel from Microalgae Based on Co2 Released from Cement Industries (Case Study: - Dangote Cement Plant)

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dc.contributor.advisor Yimam, Abubeker (PhD)
dc.contributor.author Assefa, Mekonnen
dc.date.accessioned 2018-07-16T06:14:32Z
dc.date.available 2018-07-16T06:14:32Z
dc.date.issued 2016-06
dc.identifier.uri http://localhost:80/xmlui/handle/123456789/8581
dc.description.abstract Fossil fuels which are recognised as common sources of energy are continuously decreasing in quantity due to increasing demand, Moreover, the increase in atmospheric carbondioxide from chemical industries like cement plants is resulting in global climate change. In order to achieve environmental and economic sustainability, 3rd generation biofuel derived from microalgae are considered to be the best alternative energy resource compared to 1st and 2nd generation biofuels. Mixed species of microalgae was sourced locally from Kilole Lake at Bishoftu district and found suitable feed stock to produce algal biodiesel in the laboratory. Experiments were carried out using PVC jars of 3.5 litre capacity using 0.1 to 4% carbondioxide concentration, air bubbling rate of 0.1 to 7.0 litre per minute and pH ranged between 5 -7. The maximum biomass was obtained 0.44 gm/lt at pH 7, bubbling rate 3.5 lt/min and 2% carbondioxide feed. Oil was extracted from the algal biomass and analysed for water content, acid value, and fatty acid composition and saponification value. Algal oil fatty acid composition was very low and as a result of this no pre-treatment of algal oil was needed. Biodiesel produced by transesterfication of algal oil performed by using sodium methoxide as catalyst, and it was analysed for kinematic viscosity, specific gravity, acid value and sulphated ash. The properties of biodiesel tested were within limits of ASTM standard. Scale up of biodiesel plant in integration with the cement industry facility was studied as a way to mitigate the carbondioxide released from the plant flue gas as well as to address the shortage of fossil fuel in our country. Using the preliminary design of the biodiesel plant, a production capacity of 5,860 ton/year biodiesel was obtained and it was possible to capture 22,893.3 ton per year carbondioxide released from the cement industry. The net energy ratio of the proposed plant is 1.03; meaning 3% of energy can be produced more than required by the process. Key words: - Algal biomass, carbon dioxide, lipid oil, Biodiesel, Raceway pond en_US
dc.description.sponsorship Addis Ababa University en_US
dc.language.iso en en_US
dc.publisher Addis Ababa University en_US
dc.subject Algal biomass; carbon dioxide; lipid oil; Biodiesel; Raceway pond en_US
dc.title Biodiesel from Microalgae Based on Co2 Released from Cement Industries (Case Study: - Dangote Cement Plant) en_US
dc.type Thesis en_US

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