Research on the Combined Treatment of COD Wastewater by Fenton Oxidation Flocculation Precipitation
According to the characteristics of organic wastewater,this paper adopts the combined treatment method of Fenton oxidation-flocculation sedimentation.Through orthogonal experiments,the effects of factors such as pH value,reaction time,hydrogen peroxide,ferrous sulfate,aluminum sulfate,and polyacrylamide on the COD removal rate are investigated.The experimental results show that when the pH value of wastewater is adjusted to 3.0,the dosage of ferrous sulfate is 1.0 g/L,the dosage of 30% hydrogen peroxide is 6.0 ml/L,the reaction time is 30 minutes,the addition amount of aluminum sulfate is 2.0 g/L,and the addition amount of polyacrylamide is 1.0 g/L,the combined treatment method of Fenton oxidation-flocculation sedimentation has the best removal effect on the COD value in domestic sewage,reaching 75.2% .
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