废水处理系统中有机物分子量分布及其变化

采用超滤膜法对废水处理系统中有机物的分子量分布及其变化进行研究,分析有机物分子量分布特性及不同分子量分布区间有机物的相对含量。结果表明:厌氧、缺氧、好氧反应池出水中,小于1K分子量区间上的有机物所占比例最高。该分子量区间有机物TOC分别占总TOC的60.9%、58.5%、65.2%,UV254分别占总UV254的69.9%、67.9%、82.1%。传统工艺对小分子量有机物去除效率较低。

Distribution and Transformation of Molecular Weight of Organic Matters in a Wastewater Treatment System

Distribution and transformation of molecular weight of organic matters in a wastewater treatment system were monitored by ultrafiltration membrane method.Characteristics of molecular weight distribution of organic matters and amounts of organic fractions in different molecular weight ranges were measured.Results showed that organics on the fraction of molecular weight less than 1K had the largest ratio in total organics of outlets in the anaerobic,anoxic and aerobic tank.TOC of the organics with low molecular weight less than 1K was 60.9%,58.5%,65.2% of total TOC,and UV254 was 69.9%,67.9%,82.1% of total UV254 respectively.It is less efficient to remove organics of low molecular weight by traditional treatment process.