| 摘要 |
PURPOSE:To remove effectively oil including water-soluble oil or COD in waste water by bringing waste water into contact with coal or coke having specified grain size. CONSTITUTION:Waste water is brought into contact with coal or coke having <=5mm grain size in a mixing tank or an adsorption tower. Namely, since coal or coke having excellent physical and chemical adsoptive power and also having high adsorptive power to a substance having strong polarity is used, oil or COD in industrial waste water can be effectively treated, coal or coke, an adsorbent, obtained only by crushing already oxidized coal or coke in specified grain size need not be reactivated unlike activated carbon and hence is far cheaper than activated carbon, a compound and multistage apparatus is not necessitated and water-soluble oil can be removed with high efficiency with a simple means such as mixing.
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