| 摘要 |
PURPOSE: A wastewater treatment equipment using cylindrical electro-coagulator, which is able to treat a large amount of wastewater at a low cost in a shortened reaction time, thereby reducing sludge discharge with not using any inorganic coagulant agent, is provided. CONSTITUTION: The system comprises a pre-treatment step, an electrocoagulation device(20) and a settling basin(30). At the pre-treatment step, water with the pH adjusted to 5 to 6 by feeding acid or alkali and ozonized to 15 ppm by ozone of ozone generator(16) in a raw water tank(10) is pumped to the electrocoagulation device(20) through a sand filter(18). In the electrocoagulation device(20), cathode bar(24) and anode bar(26), which are made of aluminum material, are installed at positions spaced apart and applied by alternations of 200 times per minute by direct current of 400A at 15V from electrical power generator(28) to discharge Al¬+3 ion forming coagulated floc in wastewater.
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