冷冻复合法处理高盐高有机物废水

基于水分子冷冻结晶过程中排除杂质的原理,将重力、微波和离心方法应用于脱除废水中的有机物和盐.对于配置的初始化学需氧量为10000mg?L-1,初始盐度为10 000mg?L-1的模拟废水,实验研究了应用冷冻-重力-离心方法(FGCM)、冷冻-微波-离心方法(FMCM)和冷冻-微波-重力-离心方法(FMGCM)处理高盐高...

Treatment of the wastewater with high concentration of salt and organic matters using the combined methods with freezing

During the solution freezing process, impurities are expelled by ice formation from water molecules. In this study, gravity-induced, microwave or centrifugal treatment methods were combined with freezing method to remove the salt and organic matter from wastewater. For the simulated wastewater with the initial chemical oxygen demand (COD) of 10 000 mg·L−1 and the initial salinity of 10 000 mg·L−1, treatment experiments were carried out using three combined methods: freezing, gravity-induced and centrifugal method (FGCM), the freezing, microwaving and centrifugal method (FMCM) and the freezing, microwaving, gravity-induced and centrifugal method (FMGCM), to investigate the organic matter and salt removal rates. The results show that FGCM had the highest removal rate, but the longest process duration; FMCM had the shortest process duration, but the lowest removal rate; FMGCM had similar removal rate as FGCM and could effectively reduce the process duration. These three methods always presented higher organic matter removal rate than salt removal rate.