What can potatoes be used to do to realize potato circular economy?

Using potato stems and leaves to develop pig industry and obtain fertilizer is to turn waste into treasure and meet the requirements of circular economy. Create an international leading potato recycling economy, namely potato deep processing. For example, extracting potato dietary fiber and potato starch from waste and extracting protein from potato juice; Potato stem and leaf+potato residue+juice waste liquid, using biotechnology to produce feed.