Fenton氧化技术处理有机硅胶生产废水的研究

Research on Processing Wastewater from Organic Silicone Production by Fenton Oxidation Technology

有机硅胶生产废水酸度大,有机物浓度高,利用常规的物理生物方法处理,很难做到达标排放。本实验采用Fenton氧化的技术处理废水,实验考察了H2O2投加量、H2O2与Fe2+的物质的量比、p H值、反应时间对Fenton氧化效果的影响。通过实验确定了最佳反应条件:p H为3.00,H2O2(质量分数为30%)投加量为160.0 m L/L,H2O2/Fe2+物质的量比为22.4∶1,反应时间2 h。该条件下COD由17466 mg/L降到3058 mg/L,去除率达82.5%,有机物去除率高,无二次污染,与传统化学方法相比有较大的优势。

The wastewater from organic silicone production has high acidity and contains organics of high concentration, which hardly meets the discharge standard after being processed by conventional physical or biological method. Fenton oxidation technology was adopted in the experiment to process the wastewater. The influence of dosage of H2O2 , amount of substance ratio of H2O2 and Fe^2＋, pH value and reaction time on oxidation effect of Fenton was studied. The optimal reaction condition was defined as following： pH value was 3.0, dosage of H202 （mass fraction = 30% ） was 160. 0 mL/L, amount of substance ratio of H2O2 and Fe^2＋ was 22. 4 ： 1, reaction time was 2 h. COD under the mentioned condition decreased from 17466 mg/L to 3058 mg/L with a removal rate of 82.5%. With high rate of organics removal and without secondary pollution, Fenton oxidation technology had greater advantage over conventional chemical method.