This invention provides a water circulation system for aquaponics, which comprises an aquaponics device, a nitration device, a leaf vegetable cultivation device, and a circulative water supply device. The aquaponics device is used for cultivating at least one fish species in cultivation water and delivering cultivation water to the nitration device. The nitration device is used for nitration of the cultivation water of the aquaponics device and delivering the nitrated cultivation water to the leaf vegetable cultivation device. The leaf vegetable cultivation device employs the cultivation water to cultivate at least one leaf vegetable species, and the circulative water supply device recycles the cultivation water in the leaf vegetable cultivation device and supplies the recycled cultivation water to the aquaponics device. Thus, the cultivation water can be continuously circulated among the aquaponics device, the nitration device, the leaf vegetable cultivation device and the circulative water supply device, so as to discharge non-toxic cultivation water and effectively reduce environmental pollution, and also recycle the water resource and prevent the waste of water resource.本發明提供一種魚菜共生之水循環系統,其包含一魚菜共生裝置、一硝化裝置、一葉菜類養殖裝置及一循環供水裝置。魚菜共生裝置養殖至少一魚類於一養殖水中,並傳輸養殖水至硝化裝置,硝化裝置對魚菜共生裝置之養殖水作硝化處理,並將經硝化處理之養殖水傳輸至葉菜類養殖裝置,葉菜類養殖裝置使用養殖水養殖至少一葉菜類,同時循環供水裝置回收葉菜類養殖裝置內之養殖水,並供應回收後之養殖水至魚菜共生裝置,如此使養殖水不斷地於魚菜共生裝置、硝化裝置、葉菜類養殖裝置及循環供水裝置間進行循環,達到無含有毒物質之養殖水排出,有效減少環境汙染,同時達到水資源再利用,也避免水資源之浪費。1‧‧‧魚菜共生之水循環系統10‧‧‧魚菜共生裝置11‧‧‧連通管路12‧‧‧硝化裝置13‧‧‧第一供水管路14‧‧‧葉菜類養殖裝置15‧‧‧循環供水裝置16‧‧‧第二供水管路
