Disclosed herein is an improved closed algae cultivation system that has an algae supplier, a first conduit, at least two containers, and at least two light light-emitting devices. The algae supplier is coupled to the at least two containers via the first conduit. Each container includes at least one sidewall, a bottom and an upper lid, which together define an accommodating volume for accommodating an algal stock culture from the algae supplier. Each container is made of at least one opaque material and includes a first opening disposed on one of the at least one sidewall, and a second opening disposed at the bottom. The at least two light-emitting devices are respectively coupled to the upper lid of each container and extend therefrom along the longitudinal direction to the container such that at least a portion of the light light-emitting devices is submerged in the liquid algal stock culture【課題】筒体と、蓋部と、少なくとも1つの発光装置とを備える密閉式藻類養殖筒を提供する。【解決手段】筒体１１０は、内部が収容空間になり、藻類を培養するための液体培養基が注入される。蓋部１３０は、透光性でない材質からなり、外部の光を遮断し、筒体の開口部を覆い、筒体の内部を密閉式構造とする。発光装置１４０は、一端が蓋部に接続され、深度方向に沿って筒体の下方に延伸し、少なくとも一部が筒体内の液体培養基の液面Ｓ下方に浸漬される。これにより、十分に藻類に光合成作用を進行させて、培養速度を向上させることを図る。【選択図】図１
