Plants can be used to treat used cooking oil: 1. Pretreatment: Eliminating most of miscellaneous articles or objects in the used cooking oil. 2. Elementary filtration and refining filtration: Removing impurities quickly and thoroughly (not bigger than 10 um, even 5 um). 3. Dehydration: Removing most of the water in the cooking oil (not more than 1%). 4. Also can decolorize the used oil: from black or deeply brown to white or clean. .................................................................... Designing & manufacturing according to your requirements. Please to feel free to contact us today. We will offer you excellent quality and reasonable prices.