Screening of Fresh Water Microalgae from Eastern Region of India for Sustainable Biodiesel Production

International Journal of Green Energy (Impact Factor: 1.22). 08/2011; 8(6). DOI: 10.1080/15435075.2011.588764


Study of six different freshwater microalgae, collected from Odisha, eastern region of India, has been carried out to find out their potential for biodiesel production. The growth, total lipid, and fatty acid composition of six microalgal strains were determined. Chlorella sp. IMMTCC-2, which exhibited high lipid content with considerable amount of unsaturated fatty acids, was selected for culture in a self-designed photobioreactor in order to study the scale-up possibilities. The result shows significant increase in lipid accumulation from logarithmic phase to stationary phase in the photobioreactor, i.e., from 12.4 to 28.3%. Analyses of the present results suggest that Chlorella sp. IMMTCC-2 is appropriate for biodiesel production

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    • "biofuels can generate more energy than the process consumes during production (Farrell et al. 2006; Campbell, Beer, Batten 2011). In the recent years, microalgae as the feedstock for the third-generation biofuels have gained a lot of interest (Stephens et al. 2010; Nayak et al. 2011; Gaurav, Richa, Singh 2013; Zhu et al. 2013a, 2013b, 2013c), since they can potentially solve most of the concerns that the first-and second-generation fuels will confront to (Sander and Murthy 2010). Microalgae, utilizing CO 2 and sunlight through photosynthesis , are autotrophic organisms, ranging from unicellular to multi-cellular forms, including both prokaryotic microalgae, e.g. "
    L Zhu · S Huo · L Qin
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    ABSTRACT: The interest in using microalgae to produce biodiesel is rapidly increasing in an effort to search for renewable and alternative energy. In an attempt to support algal biodiesel industry, the exploration of sustainability concerns involved in biodiesel refinery is becoming more and more necessary and important. From a sustainability perspective, this paper addresses the environmental, economic, social, and cultural implications of microalgae-based biodiesel refinery. From an environmental standpoint, there are four main related concerns: first, less water is required and water used can be recycled greatly, but it might cause water and even groundwater pollution; second, although low-value lands can be used for construction, it might cause land use changes and soil erosion; third, infrastructure construction and eutrophication by water pollution will threaten on local biodiversity; finally, there are some disputes of energy input and greenhouse gases emissions. From an economic point of view, the main benefit lies in an increase of employment and incomes, while the main drawback is the overwhelming investments required due to high costs. Socially, it can improve energy security and create jobs, while, on the other hand, it might affect the health of local animals and people. From a cultural viewpoint, algal biodiesel concept is a new element, and it requires time for people to adapt. With effective use of measures in technologies and policies, the microalgae-derived biodiesel industry will commercialize at levels of sustainability.
    Full-text · Article · Jun 2015 · International Journal of Green Energy
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    ABSTRACT: This article describes the possible utilization of three emulsions obtained from karanja methyl ester (KME) and wood pyrolysis oil (WPO) as fuels in a direct injection diesel engine. For this study, the three emulsions, namely, WPO5, WPO10, and WPO15 were prepared by taking WPO at 5%, 10%, and 15% with KME at 95%, 90%, and 85%, respectively, using a suitable surfactant for preparing water-in-oil emulsion. Experiments were conducted to evaluate the combustion, performance, and emission parameters of a single cylinder, four-stroke, air-cooled, direct injection, diesel engine running with the three emulsions. The results of the experiments were compared with diesel operation. The test results indicate that lower ignition delay and high peak cylinder pressures are observed with KME-WPO emulsions. The KME and KME-WPO emulsions exhibit lower specific energy consumption and higher exhaust gas temperatures. Results also indicate that nitric oxide emissions for KME and WPO5, WPO10, and WPO15 emulsions are higher by about 16%, 10.8%, 2.2%, and 0.5% compared with that of diesel fuel at full load. The hydrocarbon emissions for KME, WPO5, WPO10, and WPO15 are found to be lower by about 7.1%, 50%, 42.8%, and 28.5%, respectively, compared with that of diesel at full load. The percentage reduction in the smoke density by 25%, 21.4%, 16%, and 10% is achieved with KME, WPO5, WPO10, and WPO15, respectively, at full load when compared with diesel fuel.
    No preview · Article · Nov 2012 · International Journal of Green Energy
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    ABSTRACT: Fossil fuels are the chief contributors to urban air pollution and major source of green house gases and considered to be the prime cause behind the global climate change. Biofuels are renewable, can supplement fossil fuels, reduce green house gases and mitigate their adverse effects on the climate resulting from global warming. In the present study, biodiesel produced from Karanja oil is evaluated as alternative fuel in a diesel engine. The experiments are conducted on a single-cylinder, four-stroke, direct-injection, CI engine and the experimental parameters include the percentage of Karanja biodiesel in the blend, engine load, injection pressure and compression ratio. Comparative measures of brake thermal efficiency, brake specific fuel consumption, smoke opacity, HC, CO and NOX emissions are presented and discussed. Results show that the performance of the engine fuelled with Karanja biodiesel and its blends with diesel fuel is generally comparable to that when the engine is fuelled with pure diesel. At higher compression ratios the engine gives lesser emissions and better performance. Genetic algorithm optimization technique was used to optimize the parameters. With respect to maximum efficiency and minimum emissions, the optimum values of load, compression ratio, injection pressure and blend were 6kg, 18, 247bar and B95 respectively.
    No preview · Article · Nov 2012 · International Journal of Green Energy
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