超重力-臭氧法处理TNT红水的试验研究

Experimental Research on High-gravity Ozone Oxidative Treatment of TNT Red-Water

为提高O3氧化处理TNT红水的功效和利用率,节约水处理成本,将具有高效传质特性的旋转填料床用于研究O3氧化处理TNT红水的特性规律。考察了超重力因子β、红水初始pH值和气液比等因素对红水COD去除率的影响。结果表明,β对COD去除率有明显的影响,随着pH值的增大β对COD去除率的影响增大,β大于100后对COD去除率的影响不明显;COD去除率随气液比的增加呈先减小后增大的趋势;COD去除率随pH值的增大而升高,当pH值超过11时,COD去除率有所下降。通过试验证明了该方法在技术上是可行的,具有良好的应用前景。

In order to increase the efficiency of the ozone oxidative treatment of TNT red-water and reduce the costs of treatment,a novel rotating packed bed with high mass transfer characteristics is used to investigate the characteristic rule of the ozone oxidative treatment of TNT red-water. Various operating variables, including high gravity factor β, initial pH value of red-water and ratio of gas to liquid, affecting the removal efficiency of COD in red-water are studied. The results indicate that the effect of high gravity factor on the removal efficiency of COD in red-water increases with increasing initial pH value of red-water. However this effect is not obvious as high gravity factor t3 is higher than 100. The removal efficiency of COD decreases with increasing ratio of gas to liquid, then gently increases. The removal efficiency of COD increases with increasing initial pH value. When pH value exceed 11, the removal efficiency of COD will decrease. The experimental results prove the possibility in technique and show a good application future for high-gravity ozone oxidative treatment of TNT red-water.