微电解Fenton法处理有机废水可行性研究

采用微电解Fenton法处理硫铵酯-苯甲羟肟酸-苯胺黑有机废水。考察了初始pH值、铁屑及活性炭投入量、曝气量、H₂O₂用量、催化剂MnO₂加入量和反应时间对废水COD、NH₃-N和色度去除率的影响。最佳条件为:初始pH=3、铁屑用量70 g/L、活性炭用量80 g/L、H₂O₂用量7 mg/L、MnO₂用量8.0 g/L、曝气量500 mL/(min·L)、反应时间20 min,此时废水COD、NH₃-N和色度的去除率达88.21%、93.57%和98.68%。通过多因素正交实验确定了影响COD、NH₃-N和色度去除率的因素强弱顺序为:铁屑投入量=活性炭投入量>H₂O₂用量>pH值>MnO₂用量。

Feasibility Study of Microelectrolysis-Fenton Process for Organic Wastewater Treatment

The organic wastewater containing ammonium thiosulfate-benzhydroxamic acid-aniline black was treated by using microelectrolysis-Fenton process. The effects of initial pH value, amount of iron scraps and activated carbon, volume of aeration, H₂O₂ dosage, amount of catalyst MnO₂, as well as reaction time on removal rates of COD, NH₃-N and chroma in wastewater were investigated. It is found that under the following optimal conditions, including an initial pH value of 3, 70 g/L of iron scraps, 80 g/L of activated carbon, 7 mg/L of H₂O₂, 8.0 g/L of MnO₂, aeration at 500 mL/(min·L) and 20-min reaction time, the removal rates of COD, NH₃-N and chromaticity in wastewater are 88.21%, 93.57% and 98.68%, respectively. A multi-factor orthogonal experiment was then performed to determine the order of factors affecting removal rates of COD, NH₃-N and chroma, which is shown in the following order: iron scraps input=activated carbon input>H₂O₂ volume>pH value>MnO₂ dosage.