| 摘要 |
Disclosed and claimed herein is a system and method for producing biodiesel fuel from low quality feedstock sources of free fatty acids. The system includes a reaction chamber having a jacket for circulating heating fluid around the chamber; a feedstock pre-treatment assembly; a methoxide reaction tank; a settling tank; a crude biodiesel wash assembly; and, a methanol recovery assembly, also referred to as a methanol recoverer herein. The method includes the steps of pre-treating the feedstock by heating and, optionally, filtering it; reacting the feedstock in the reaction chamber with a source of esters thereby carrying out transesterfication of the free fatty acids, thereby producing an intermediate reaction product, cooling the intermediate reaction product to allow glycerine to settle out, separating the glycerine from the crude biodiesel, and washing the crude biodiesel to remove impurities, thereby producing biodiesel fuel.
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