Microalgae Biodiesel Thesis

Microalgae Biodiesel Thesis-79
The bio-oil content yield was found higher at 350 o C with 30 as compared to 60 min holding times and the GC-MS analysis showed the presence of fatty acids (C14-C18).

The microalgae biomass was applied with 1-5 min treatment at 50% and 100% power settings and lipids were extracted.

Thermal analysis with Differential Scanning Calorimetry (DSC) was conducted to investigate the thermal behaviour of algal biomass with microwave treatment.

The microwave treatment was found the most energy efficient method with a higher percentage of cell disruption as compared the other treatments.

The microwave treatment, was chosen to enhance the lipid extraction with an organic solvent extraction from dry powdered and wet algal paste.

The extracted oil fatty acid profile showed favourable properties to convert the oil into biodiesel.

In-situ transesterification of flaxseed was conducted and 93 % was converted into biodiesel.

This thesis investigates and compares different oil extraction methods and tries to fill the research gaps in the oil extraction processing, for example, utilising new techniques such as ultrasonic or microwave assisted solvent extraction.

A detailed energy analysis for the extraction processes was conducted for each method to investigate the process feasibility to produce biodiesel more economically.

The hydraulic pressing (10-100 bars) with and without LN2 treatment was also found with promising results with more than 90 % cell disruption.

The extracted algal lipids physical and chemical properties were found in an agreement with previous workers.


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