混凝-活性炭工艺处理高浓度有机废水研究

Study on the treatment of high strength organic wastewater with coagu｜ation-ac

采用混凝和活性炭组合工艺处理高负荷有机废水，比较了自制的聚合硅酸铁（PSF）和复合铝铁（PFA）的混凝效果。实验结果表明：PSF在投药量为500mg．L^-1、活性炭（AC）用量为log／t、吸附时间为45min、pH：7左右的条件下，COD去除率可以达到92％，从99660mg／L降低到8257mg／L，而同样条件下PFA去除率仅在84％以下。验证了该流程降解难生物降解有机物的机理主要是Fe^3＋氧化作用和活性炭的吸附作用。

Coagulation-activated carbon （AC） process was introduced into the treatment of high strength organic wastewater. Removal efficiency of poly-silicon-ferric sulfate （PSF） was compared with polymeric-ferric aluminum （PFA）, the result showed that COD removal could reach 92% under the condition of PSF and AC dosage 500 mg/L and 20 g/L, absorption time 45rain, pH 7. COD reduced to 8257 mg/L from 99660 mg/L, while PFA could only remove less than 84% COD on the same condition. The mechanism of degradation of biorefractory organic matters with coagulation-AC process were proved to be the oxidation of Fe^3＋ and absorption of AC.