黄海南部海水中COD降解规律的研究

The Degradation Rule of COD In South Yellow Sea

基于黄海南部海水实际的环境条件,对排海尾水中主要污染物COD在不同的温度、COD质量初始浓度、pH值和Cl-质量浓度下于海水中的降解进行正交组合的实验研究;应用统计学原理,进行实验数据的整理分析,定量化地进行污染物降解的动力学过程研究;建立不同条件下的动力学模型,应用最小二乘法原理进行参数的回归分析;运用相关分析法、统计学假设检验进行模型的显著性验证,以正交实验结果为基础,进行COD降解的单因素分析以及多因素影响的主因素分析。结果表明,COD降解规律符合一级反应动力学过程;温度、COD质量初始浓度是影响COD降解速率的最重要因素。

Based on the actual environment condition of the water quality in the south Yellow sea, The biodegradation problem of chemical oxygen demand （COD） in the seawater was researched under laboratory conditions. The COD biodegradation was measured at different temperature, initial pollutant concentration, PH, and concentration of the chloridion. According to the first order research kinetics, the kinetic models were established under different conditions. The regression analysis to the parameter was made with the least-square principle, the model＇s signif- icance with correlation analysis technique and statistic hypothesis testing were tested; the orthogonal experiment data is based on the most factors of COD degradation. The results showed that COD degradation follows the first-order kinetic relationship, and temperature and initial concentration of pollutants were the main factors.