METHOD AND APPARATUS FOR TREATMENT OF WASTE WATER

PURPOSE:To reduce treatment cost, by using a soluble electrode as an anode while using a solar cell as a power supply to apply electrolytic treatment to waste water. CONSTITUTION:In a waste water treatment apparatus consisting of a solar cell 1 and an electrolytic cell 7, six pairs of electrodes 12, 12A are provided in an electrolytic cell 7 and a separation tank 10 for separating the floc formed in the electrolytic cell 7 is connected to the electrolytic cell 7. A waste water storage tank 5 stores waste water temporarily and also has functions for adjusting pH and the concn. of an electrolyte, and a stirrer 8 and an air bubble generator 9 promote the electrolytic treatment in the electrolytic cell 7 and prevent the surface contamination of the electrodes. When a DC current is supplied to the electrodes, nascent colloidal anodic metal hydroxide is formed from anodes and heavy metal hydroxide is floated and precipitated as floc along with anodic metal hydroxide colloid to be separated from waste water. By this method, a heavy metal can be effectively separated.