| 摘要 |
PURPOSE: A preparation method of a polymeric organic/inorganic coagulant for wastewater treatment is provided, which is characterized in that a polymeric organic coagulant is mixed with an inorganic coagulant(one of ferrous sulfate(FeSO4), ferric sulfate(Fe2(SO4)3), ferrous chloride(FeCl2) and ferric chloride(FeCl3)) to treat wastewater, so that the treatment process becomes simplified and removal rates of COD, BOD, SS and heavy metals are increased. CONSTITUTION: A preparation method of a polymeric organic/inorganic coagulant for wastewater treatment comprises the following steps of: (i) mixing a liquid anionic or cationic poly-amide(1000 ppm) as the polymeric organic coagulant with the ferric salts as the inorganic coagulants; (ii) stirring to mix those about for an hour. In the use of the cationic poly-amide, 500 ppm of calcium chloride(CaCl2) is added to prevent agglomerating. In wastewater treatment process, the treatment efficiency is higher when this prepared polymeric organic/inorganic coagulant is injected than when the polymeric organic coagulant and the ferric salts are injected separately.
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