The invention discloses a domestic
water treatment device, comprising a casing with an inlet and an outlet, wherein the water inlet is arranged on the bottom of the casing, the water outlet is arranged on the top of the casing, and the casing is characterized in that: a nanometer
titanium dioxide-supported catalytic reactor and a waterproof lighting device are arranged in the casing, the nanometer
titanium dioxide-supported catalytic reactor is arranged on the bottom wall of the casing, the waterproof lighting device is fixed between the upper wall and the bottom wall of the casing, the nanometer
titanium dioxide-supported catalytic reactor is at least composed of a nanometer
titanium dioxide-supported catalytic member, the nanometer
titanium dioxide-supported catalytic member is composed of a first clamp
pipe, a nanometer
titanium dioxide-supported catalytic sheet and a second clamp
pipe, one side of the nanometer titanium dioxide-supported catalytic sheet is clampedly connected on the first clamp
pipe, and the other side is clampedly connected on the second clamp pipe. The nanometer titanium dioxide-supported catalytic sheet, matched to illumination, is reacted with disinfection by-products in
tap water, thereby effectively decomposing the disinfection by-products in
tap water, and reaching an ideal water purification effect.