The team of the School of Mechanical and Electrical Engineering of Harbin Institute of Technology has constructed a special micro-nano composite structure to prepare a super-wetting functional coating that is completely oil-free but completely hydrophilic. Applying this coating on a mesh substrate can achieve “ The oil-water separation of the oil-blocking water-passing type completely solves the problem of “water-blocking and oil-passing” type filtration. Using edible oil conversion technology, it becomes a biodiesel that can be used in Liyong. The using steps Waste oil poured into the sink Collect waste oil by Re-oil Remove the Re-oil bottle Take it to service station Get money