Fe0/H₂O₂高级氧化处理制药废水的实验研究

Experimental Study on Fe0/H₂O₂ Advanced Oxidation Treatment of Pharmaceutical Wastewater

摘要: 本研究的目的是采用Fe0/H₂O₂技术处理某药业有限公司废水的可行性。该公司主要生产抗生素类药物，废水中COD和氨氮含量较高，并含有来源结构稳定、高浓度的、难生物降解的、有毒有害多种有机污染物。依靠零价铁在酸性条件下生成的Fe²⁺和H₂O₂构成Fenton体系，通过Fe0的还原作用和Fenton体系产生的羟基自由基(•OH)的氧化作用来降解废水中的有机物。实验从Fe0的还原时间、Fenton试剂反应时间、Fe0的投加量、H₂O₂的投加量、pH、制药废水初始浓度这几个方面来对制药废水的COD和氨氮含量的去除率展开探讨。Fe0/H2O2氧化处理制药废水的结果表明，最佳条件是在Fe0的投加量为0.2 g/L、H₂O₂的投加量为10 mmol/L，在pH = 3的条件下，Fe0/H2O2氧化时间为60 min，处理初始浓度COD为2230 mg/L、氨氮为120.4 mg/L的制药废水时COD去除率为85.52%，氨氮去除率为84.56%。

Abstract: The purpose of this study is to investigate the feasibility of using Fe0/H₂O₂ technology to treat wastewater from a pharmaceutical limited company. The company mainly produces antibiotic drugs, and the wastewater contains high levels of COD and ammonia nitrogen, as well as various organic pollutants with stable source structure, high concentration, difficult biodegradation, and toxicity. The Fenton system is composed of Fe²⁺ and H₂O₂ generated by zero valent iron under acidic conditions. The organic matter in wastewater is degraded through the reduction of Fe0 and the oxidation of hydroxyl radicals (∙OH) generated by the Fenton system. The experiment explores the removal rate of COD and ammonia nitrogen content in pharmaceutical wastewater from several aspects: Fe0 reduction time, Fenton reagent reaction time, Fe0 dosage, H₂O₂ dosage, pH, and initial concentration of pharmaceutical wastewater. The results of Fe0/H₂O₂ oxidation treatment of pharmaceutical wastewater show that the optimal conditions are: the dosage of Fe0 is 0.2g/L, the dosage of H₂O₂ is 10mmol/L, and at pH=3, Fe0/H₂O₂, oxidation time is 60 minutes. When treating pharmaceutical wastewater with an initial concentration of COD of 2230mg/L and ammonia nitrogen of 120.4mg/L, the COD removal rate is 85.52%, and the ammonia nitrogen removal rate is 84.56%.