PROBLEM TO BE SOLVED: To provide a liquid treatment apparatus capable of performing germicidal treatment of bacteria together with oxidative decomposition treatment of organic substances even when the organic substances and the bacteria are mixed in a liquid to be treated, and a liquid treatment method.SOLUTION: The liquid treatment apparatus 1 includes: a reaction vessel 10 having an ultraviolet light-emitting layer 22 filled with not less than 2 of granular light emitters 24, 26 having different emitting wave lengths as a granular emitter emitting ultraviolet light by microwave and a microwave-generating device 12, where germicidal treatment of bacteria and oxidative decomposition treatment of organic substances are performed by passing a liquid to be treated containing the organic substances and the bacteria through the reaction vessel 10 while irradiating the granular emitters 24, 26 with microwave generated by the microwave-generating device 12.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2018,JPO&INPIT【課題】被処理液体中に有機物と細菌類とが混在する場合でも、有機物の酸化分解処理とともに細菌類の殺菌処理を効率的に行うことができる液体処理装置および液体処理方法を提供する。【解決手段】マイクロウェーブにより紫外線発光する粒状発光体として発光波長の異なる2種類以上の粒状発光体24,26を充填した紫外線発光層22を有する反応槽10と、マイクロウェーブ発生装置12と、を備え、マイクロウェーブ発生装置12により発生させたマイクロウェーブを粒状発光体24,26に照射しながら、有機物と細菌類とを含む被処理液体を反応槽10に通液させて、有機物の酸化分解処理とともに細菌類の殺菌処理を行う液体処理装置1である。【選択図】図1