There is a catering oil-water separator. Depending on the material, there are about 3,000 plastic ones or even 1000, and 20,000 stainless steel ones or 3. 1 10,000. Marine oil-water separators vary from 60,000 to150,000 depending on tonnage, all of which are made in China. There are two companies in Shanghai that do well in marine oil-water separators, one is Shijiu, the other is Xuan Ming Environmental Protection, and Xuan Ming Environmental Protection also does catering oil-water separators.