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采用混凝破乳-Fenton氧化联合工艺对高浓度丙烯酸乳液废水进行处理,探究了反应pH值和混凝剂用量对混凝处理效果的影响及pH值和芬顿试剂投加比例对氧化去除COD效果的影响。原丙烯酸废水COD为5 470mg/L,浊度为14 904.1NTU。结果表明,混凝破乳的最优条件为pH=8,PAC用量为0.9g/L,PAM用量为4mg/L。Fenton氧化处理的最优条件为pH=3,H_2O_2/COD(质量浓度比)=2,Fe~(2+)/COD(质量浓度比)=0.075。经混凝破乳-Fenton氧化处理后COD去除率为96.5%,浊度去除率约为99.6%,出水COD下降为190.3mg/L,浊度约为60NTU,废水的可生化性得到改善。
The coagulation-emulsion-Fenton oxidation process was used to treat high concentration acrylic acid emulsion wastewater. The effect of pH value and coagulant dosage on the coagulation treatment was investigated. The effects of pH and Fenton dosage on COD removal by oxidation Effect of effect. The original acrylic acid wastewater COD 5 470mg / L, turbidity 14 904.1NTU. The results showed that the optimal conditions for coagulation and demulsification were pH = 8, PAC dosage 0.9g / L, PAM dosage 4mg / L. The optimal conditions for Fenton oxidation were pH = 3, H 2 O 2 / COD = 2 and Fe 2+ / COD = 0.075. After the coagulation-demulsification-Fenton oxidation process, the COD removal efficiency was 96.5%, the turbidity removal rate was 99.6%, the effluent COD decreased to 190.3 mg / L, the turbidity was about 60 NTU, and the biodegradability of wastewater was improved.