AN ELECTRO-COAGULATION METHOD OF COLOR REMOVAL IN WASTEWATER OR WATER WITH LOW POWER CONSUMPTION

摘要

A method of treatment of wastewater or water where the wastewater/water (W 1 ) to be treated is first mixed with wood ash (L1) at a ratio of 0,278 kg of ash per mSUP3/SUP of wastewater/water. The resulting wood ash leachate is first allowed to settle to remove larger debris (tank 3) before it is subjected to electro-coagulation to remove colour (tank 4). The detention time of leachate during electro-coagulation is kept at a maximum of one minute to ensure minimal power consumption. Further to this, the ratio of electrode (10a, 10b, 11 a, 11 b, 12a, 12b) surface area to volume of water is kept close to 0,0645 mSUP2/SUP/mSUP3/SUP.