Abstract
Abstract Microalgae have been mentioned as a promising feedstock for biodiesel production. In this study, microalgae Chlorella vulgaris (MCV) was cultivated in a bioreactor with wastewater. After biodiesel production from MCV oil via transesterification reaction, chemical and physical properties of MCV methyl ester were evaluated with regular diesel and ASTM standard. Besides, engine performance and exhaust emissions of CI engine fuelled with the blends of diesel-biodiesel were measured. The GC-MS analysis showed that oleic and linoleic acids were the main fatty acid compounds in the MCV methyl ester. Engine test results revealed that the use of biodiesel had led to a major decrease in CO and HC emissions and a modest reduction in CO2 emissions, whereas there was a minor increase in NOx emissions. Furthermore, there was a slight decrease in the engine power and torque while a modest increase in brake specific fuel consumption which are acceptable due to exhaust emissions reduction. The experimental results illustrate considerable capabilities of applied MVC biodiesel as an alternative fuel in diesel engines to diminish the emissions.
Highlights
In recent years, owing to population growth, increasing people prosperity and development of technologies, energy demand has increased which results in environmental pollution
The lipid content for microalgae Chlorella vulgaris has been estimated to be appropriate for industrial production which is about 40–50 % [14]
This chapter describes the materials and methods ap plied throughout this study and consists of the three major experimental parts which include a description of microalgae cultivation and biomass production, description of lab-scale procedures for conversion of microalgae Chlorella vulgaris (MCV) oils to fatty acid methyl esters (FAMEs), and explanation of the exp erimental test setups for the using MCV biodiesel in CI engine. 2.1
Summary
In recent years, owing to population growth, increasing people prosperity and development of technologies, energy demand has increased which results in environmental pollution. Microalgae are considered to be one of the best options and attractive feedstocks for biodiesel production, which has higher lipid content and growth rate, lower environmental impact and productivity in unsuitable land and wastewater compared with other generation [3]–[7]. This substance has high CO2 sequestration capability [8], [9]; it can apply the biotechnology modifications to adjust the environments of cultivation [10], [11]. The biomass remaining after oil extraction can be applied as fertilizers to boost the properties of arable land or it can be used as animal food
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