24-11-2010 дата публикации
Номер: CN0101891317A
Принадлежит:
The invention discloses a synthetic diamond purification wastewater treatment method which comprises the following steps: collecting wastewater into a stock solution tank by using ducts, and pumping the wastewater stock solution into an aeration tank to be aerated and oxidized for 15-24 hours, thereby oxidizing Fe<2+> in the stock solution into Fe<3+>; adding lime powder and liquid sodium hydroxide in the mass ratio of 1:2, stirring, and regulating the pH value of the solution to 3.5-4.0 so as to precipitate Fe<3+>; and pumping the filtrate into a secondary conditioning tank, adding 150-200 g/L sodium sulfide solution, stirring, regulating the pH value to 7.0-8.0 and precipitating all nickel ions and remnant ferrous ions. The pH value of the treated water is 7.0-8.0, the content of Fe is 0-3 mg/L, the concentration of nickel ions is less than 1 mg/L, and thus, the treated water completely reaches the emission standard; and the amount of secondary filter pressing mud is small, thereby saving ...
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