Biodiesel washing

There are different techniques for biodiesel washing, including agitation washing, mist washing, and resin based biodiesel washing. The process of biodiesel washing uses mixed with water. Water is weighted than biodiesel and absorb the excess alcohol, catalyst, and soap suspends in the fuel. After biodiesel washing and settling, the water and the impurities in the water can be absorbed from the bottom of the container. Several wash cycles are usually required. The first water absorbed off the bottom of the biodiesel will be milky, and the final wash water drained off clearly. Excess catalyst in the biodiesel will form soap when mixed with water, and it takes a while for the soap to settle out. Depending on the process used, it takes roughly one gallon of water per one gallon of biodiesel for a wash cycle. The mixing should be thorough and the water should be dispersed throughout the biodiesel.