| 摘要 |
PURPOSE:To stably and properly treat even agricultural chemical-containing water of which the pH is made acidic by acidic rain up to desired contamination concn. by bringing agricultural chemical-containing waste water into contact with a mineral carbonate are before treating the same with a biological carrier. CONSTITUTION:A treatment tank 10 having a water collecting port 12 as agricultural chemical-containing waste water inflow and outflow ports is packed with a mineral carbonate are, for example, finger coral 13 on the inlet side thereof and packed with active carbon 14 and aggregate 15 as a biological carrier on the outflow port side of the mineral carbonate are and at least agricultural chemical-containing waste water is brought into contact with finger coral 13 and subsequently treated with active carbon 15 being the biological carrier. Since agricultural chemical-containing waste water is treated by combining the mineral carbonate are bed and the biological carrier bed in a specific order as treatment beds, agricultural chemical-containing waste water is buffered in its pH at first to be subsequently microbiologically treated and even agricultural chemical-containing waste water of which pH is changed to an acidic side by acidic rain is properly treated. |
