SDG 7 : Affordable and clean energy
Ensure access to affordable, reliable, sustainable and modern energy for all
Since 2017, Mahidol University, Salaya Campus, has been developed Biodiesel project. Due to Biodiesel station is setting at the Mahidol Learning Center building (MLC), which is central area for canteen, serving more than a thousand people. Accordingly, there is produce a lot of used cooking oil.
For Biodiesel production from waste cooking oil by Transesterification, which is a chemical reaction between fat or oil and alcohol. The product is ester and glycerol with catalyst in the reaction. The Biodiesel production process including; Which has steps Is to filter 50 liters of fried oil repeatedly through the filter tank and pump into the reaction tank. To boil away the humidity at 110ºC for 30 minutes. Heated oil will be cool down to 50-55ºC. Add 10 L of methanol and gradually add 600 g of potassium hydroxide into feedstock oil. After that, stir the mixing solvent in the reactor tank at 50-55ºC for 10 minutes. Allow feedstock oil to separate in the reactor tank for 6 hours. There are separated products, the top is a clear yellowish biodiesel and a dark brown glycerol in the bottom. Glycerol is released to glycerol tank. Clean the remaining biodiesel in reactor tank by water for 3-4 times. Reheat the biodiesel again. Then, allow the heated biodiesel cool down and pump into biodiesel storage tank. The produced biodiesel is 80% of the used cooking oil as raw material. Total renewable energy of bio diesel in Salaya campus is 21,829.39 kwh from 1 year, that is used as fuel of dumper vehicle. This is the answer for reducing waste and sustainable management.