Method and system for extracting and purifying algae oil for low-temperature biofuel production

Abstract

The present invention provides a novel method and system for extracting and purifying algae oil from wet algae slurry or liquid algae, for producing high-performance biofuels suitable for cold-climate applications. The method involves a multi-step process, with the stabilization of algae slurry or liquid algae at controlled flow rates and temperatures between 40°C and 70°C in a stabilization tank. The slurry is then subjected to interference wave extraction using piezoelectric devices operating at frequencies between 11 MHz and 26 MHz, enhancing cavitation energy and causing vaporization of the algae oil mixture. The vaporized mixture is passed through an ion exchange system to remove heavy metals, improving the purity of the extracted oil. A multi-stage condensation process is employed to separate heavy and light fractions of crude algae oil, with a final step involving the restructuring of oil molecules using a magnetic field. The vaporized algae oil is esterified in alcohol to produce a biofuel ester with a pour point below -10°C, suitable for use in aviation, automotive, and other low-temperature applications. Figure 1A