Problem to be solved: to provide an algae breeding apparatus and an algal feeding method capable of improving the efficiency of raising algae.The algal feeding apparatus 10 comprises a gas dissolving portion 20, an algae tank 30, a first LED 40, a second LED 41, a supply portion 50, and a circulation pump 60.The gas dissolving portion 20 dissolves carbon dioxide and oxygen in the deep sea water to generate water.The algae tank 30 contains rearing water and laver body.The circulation pump part 60 sucks the rearing water and the nori leaf body from the algae tank 30 and sends it to the gas dissolving part 20, and passes the supply pipe 51 of the gas dissolving part 20 and the supply part 50, and injects the breeding water and the nori leaf into the algae tank 30.The supply part 50 releases the rearing water and the nori leaf body along the direction crossing diagonally with respect to the bending direction of the inner surface of the algae tank 30, and the nurturing water flows in the algal tank 30 as a spiral flow.Diagram【課題】藻類の育成効率を向上させることができる藻類育成装置及び藻類育成方法を提供する。【解決手段】藻類育成装置１０は、気体溶解部２０と、藻類槽３０と、第１のＬＥＤ４０と、第２のＬＥＤ４１と、供給部５０と、循環ポンプ部６０とを備える。気体溶解部２０は、海洋深層水に二酸化炭素及び酸素を溶解して育成水を生成する。藻類槽３０は、育成水と海苔葉体を収容する。循環ポンプ部６０は育成水と海苔葉体を藻類槽３０から吸出して気体溶解部２０へ送出し、気体溶解部２０と供給部５０の供給管５１を通過させて育成水と海苔葉体を藻類槽３０内へ注入する。供給部５０は、藻類槽３０の内側面の湾曲方向に対して斜めに交差する方向に沿って育成水と海苔葉体を放流し、育成水は渦状の流れとなって藻類槽３０内を流れる。【選択図】図１
