Patent ID: 8182064

Claim:
A waste liquid treatment device comprising: a storage unit configured to store waste liquid which is cured upon reception of an ultraviolet ray; an irradiating unit configured to irradiate a liquid surface of the waste liquid in the storage unit in an uncured state with an ultraviolet ray, wherein the irradiating unit performs a spot irradiation of the ultraviolet ray so that the surface area of the liquid surface which is irradiated with the ultraviolet ray is smaller than the surface area of the liquid surface, a moving mechanism configured to move the irradiating unit upward and downward; and a controller configured to control the moving mechanism, the irradiating unit including: a light source of the ultraviolet ray; and a lens being positioned downwardly of the light source, the lens configured to focus the ultraviolet ray from the light source, the controller controls the moving mechanism so that a focal point of the lens is positioned at the position corresponding to the liquid surface.