Abstract: A method of removing arsenic from water by using a reactor that is provided with a fluidized bed of carriers is disclosed. An arsenic-containing influent is mixed in the reactor with a sulfide aqueous solution or metallic salt aqueous solution at a predetermined pH, thereby resulting in formation of crystals of arsenic sulfides or arsenic acid metal salts. The arsenic contained in the influent is thus removed by crystallization. An effluent with a reduced arsenic content is discharged from the reactor. The carriers, on which the crystals are formed, are periodically removed from the reactor which is replenished with fresh carriers immediately after.

Abstract: A wastewater treatment equipment comprising a reaction tank, a plurality of anodic plates, a plurality of cathodic plates, a power supply and a collection device is provided. The reaction tank comprises an inlet and an outlet. The anodic plates and the cathodic plates are placed in a staggered order in the reaction tank. The power supply is electrically connected to the anodic plates and the cathodic plates. The collection device is disposed at the bottom of the reaction tank so the colloidal particles deposited at he bottom of the reaction tank can be removed.

Abstract: A method of removing arsenic from water by using a reactor that is provided with a fluidized bed of carriers is disclosed. An arsenic-containing influent is mixed in the reactor with a sulfide aqueous solution or metallic salt aqueous solution at a predetermined pH, thereby resulting in formation of crystals of arsenic sulfides or arsenic acid metal salts. The arsenic contained in the influent is thus removed by crystallization. An effluent with a reduced arsenic content is discharged from the reactor. The carriers, on which the crystals are formed, are periodically removed from the reactor which is replenished with fresh carriers immediately after.