Glycerine

Glycerin is a by-product of biodiesel production. Biodiesel is usually produced from rapeseed oil, but can also be sunflower or soybean oil. The process consists of pressing the oil seed, after which the crude oil is refined. Subsequently, it is esterification converted into biodiesel and glycerine. The latter occupies about 10% and can be used in water purification to promote microbiology.