PROBLEM TO BE SOLVED: To provide a production method and a production facility which are capable of efficiently producing paramylum.SOLUTION: After a surfactant that is used for removing protein from genus euglena microalgae has been spent, the spent surfactant is re-utilized as cleaning liquid for cleaning machines.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2017,JPO&INPIT【課題】パラミロンを効率良く製造し得る製造方法及び製造設備を提供すること。 【解決手段】ユーグレナ属微細藻類から蛋白質を除去するのに利用する界面活性剤を用済み後、機器を洗浄するための洗浄液に再利用する。【選択図】 図1