VAT is a planted vetiver aeration device, to improve the current aeration tanks a large number of energy-consuming shortcomings, sewage by the characteristics of vetiver roots to absorb nitrogen, phosphorus and other elements, and then discharged to the sedimentation tanks, due to the rich nutrient value of the grown-ups will be cut off the stems and leaves of the drying and grinding of the animals mixed into the feed as another source of nutrients to reduce the food containing chemical substances in the nutrients, but also can be sold as an additional source of income.