PROBLEM TO BE SOLVED: To provide a sterilizer in tank, which can reduce facility cost and running cost by a simple method, and to provide sufficient sterilizing effect.SOLUTION: Provided is a sterilizer in tank comprising: an ozone generating lamp 2 installed in a tank T made of metal, which generates ozone in the tank T made of metal； an ultraviolet generating lamp 3 installed in the tank T made of metal, which generates ultraviolet rays in the tank T made of metal； and a control part 4 which controls the ozone generating lamp and the ultraviolet generating lamp. The control part controls the ozone generating lamp for a predetermined time so that ozone is generated in the tank made of metal, and thereafter controls the ultraviolet lamp so that ultraviolet rays are generated in the tank made of metal.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2020,JPO&INPIT【課題】簡便な方法で設備費用及びランニングコストを抑えることができると共に、十分な殺菌効果が得られるタンク内殺菌装置の提供。【解決手段】金属製タンクＴ内に設置された、該金属製タンクＴ内にオゾンを発生させるオゾン発生用ランプ２と、金属製タンクＴ内に設置された、該金属製タンク内に紫外線を発生させる紫外線発生用ランプ３と、オゾン発生用ランプ及び紫外線発生用ランプを制御する制御部４とを有し、制御部は、オゾンが金属製タンク内に発生するようにオゾン発生用ランプを所定時間制御した後、紫外線が金属製タンク内に発生するように紫外線発生用ランプを制御してなるタンク内殺菌装置。【選択図】図１
