羽田、意旨羽化重生的土壤，欲改善土壤狀況回歸健康土壤，羽田目前與全台逾120位農民契作有機根莖類農產品，加工後出售至通路，下腳料及廢棄物利用黑水虻生物處理技術，轉換為黑水虻幼蟲與肥料，肥料再度回歸契作農使用，幼蟲可製成飼料。
黑水虻幼蟲亦可製成微生物製劑，運用於廢水處理，降低SS及COD效果顯著，增加活性污泥池之負荷，產出之有機性污泥利用黑水虻處理又可製成微生物製劑，進行循環使用。
羽田的循環在於果皮、菜渣、廚餘等等重生再利用於肥料回歸農田，飼料回歸養殖業；有機性污泥回歸微生物製劑，再利用於廢水處理，是三個完𤨣封閉經濟循環體系。
Yuland means soil that has been reborn. In order to improve soil conditions and return to healthy soil, Yuland is currently cooperating with more than 120 farmers across Taiwan to produce organic rhizome agricultural products, process them and sell them, and use biological treatment technology to turn scraps and waste into black soldier fly larvae and fertilizer. Fertilizer is once again used by farmers, and black soldier fly larvae can be made into feed.
The black soldier fly larvae can also be made into microbial preparations and used in wastewater treatment. It has a significant effect on reducing SS and COD and increasing the load of the activated sludge tank. The produced organic sludge can be processed by the black soldier fly and can be made into microbial preparations for recycling use.
Yuland focuses on recycling: peels, vegetable residues, and kitchen waste are reused as fertilizers to return to the soil, and feeds are returned to the breeding industry; organic sludge is returned to microbial preparations, and reused for wastewater treatment. These are three completely closed economic cycle systems.