Abstract
The paper presents a method for the preparation of lubricating oil from the biomass of single-cell green algae Chlorella sp. The microalgae were grown in a synthetic nutrient medium under laboratory conditions. The biomass, which was obtained from the culture, was subjected to the process of dehydration, freeze-drying, and solvent extraction, in order to separate lipids that may be a feedstock for eco-friendly lubricants. The chemical structure of obtained bioproducts (biomass and algal oil) was investigated by means of Fourier Transform Infrared Spectrophotometry. Moreover, rheological characteristics (kinematic viscosity at 40 and 100°C, dynamic viscosity at 0–100oC) of the algal oil were determined. The results of the laboratory tests show that the oil has the chemical structure and viscosity-temperature properties similar to the rapeseed oil. This creates a potential opportunity to replace used vegetable lubricants or additives by algal oil in many technical areas.
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