Police chief Senior Supt. Gilbert Cruz of the Makati - Philippine National Police (PNP) said that they have started feeding their diesel patrol vehicles with biodiesel from Waste Vegetable Oil (WVO) donated by restaurants. 40% of the fuel from their tanks will be composed of the WVO biodiesel.
WVO biodiesel is biodiesel created from used cooking oil. The processing of WVO has additional steps because the oil is tainted with animal fats, water and other impurities when it was used in the cooking process. It usually requires an ample amount of cooking the WVO before dropping the catalyst in order to melt the hardened oil as well as to evaporate the water found in the oil. I think one way to reduce the cost of heating the oil is to use natural means, such as solar cookers.
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