PROBLEM TO BE SOLVED: To provide a liquid treatment unit that treats liquid efficiently.SOLUTION: A liquid treatment unit (100) includes: a treatment tank (101) provided with a liquid inlet and a liquid outlet, the treatment tank having a shape that allows a portion of liquid to be retained a controller (118) that stops the supply of liquid into the treatment tank (101) and the ejection of liquid from the treatment tank (101) in such a state that the liquid exists in the treatment tank (101) for a predetermined period of time and a plasma generator (102) that generates plasma in the liquid inside the treatment tank (101) while the supply and ejection of the liquid are stopped, thereby treating the liquid. After the liquid has been treated, the controller (118) resumes the supply of liquid to the treatment tank (101) and causes the liquid to be ejected while allowing a portion of the treated liquid to be retained inside the treatment tank (101).COPYRIGHT: (C)2015,JPO&INPIT【課題】効率よく液体を処理する液体処理ユニットを提供する。【解決手段】液体処理ユニット(100)は、液体供給口及び液体排出口が設けられ、液体の一部を滞留させる形状を有する処理槽(101)と、処理槽(101)内に液体が存在する状態で処理槽(101)への液体の供給及び処理槽(101)からの液体の排出を所定時間にわたって停止する制御装置(118)と、液体の供給及び液体の排出を停止している間、処理槽(101)内の液体中にプラズマを発生させて液体を処理するプラズマ発生装置(102)と、を備え、制御装置(118)は、液体が処理された後に処理槽(101)へ液体の供給を再開し、処理槽(101)内に処理された液体の一部を滞留させながら液体を排出する。【選択図】図1
