超临界水氧化法改善有机污染物可生化性的研究

难生化有机污染物二甲基甲酰胺、乙睛、氨基萘磺酸或羟基萘磺酸的高浓度水溶液 (4777— 2 82 4 4mg/L) ,经超临界水氧化处理后 ,其可生化性都有了大幅度的提高。二甲基甲酰胺、乙睛、氨基萘磺酸和羟基萘磺酸处理前的BOD5/CODCr,分别为 8.4 %、1.5 6 %、1.5 6 %和 2 .73%。经过超临界水氧化处理 ,它们的BOD5/CODCr可分别达到 2 3.2 %、5 5 .1%、5 0 .2 %和 38.8%。且随着处理温度的升高和COD去除率的上升 ,可生化性越来越好。这表明 ,超临界水氧化法不仅可以用来彻底降解有机污染物 ,也可以用于难生化有机污染物的预处理 ,为难生化有机污染物的生物处理创造条件

Investigation on biodegradability improvement of organic pollutants by supercritical water oxidation

After treatment by supercritical water oxidation(SCWO), biodegradabilities of organic pollutants, such as dimethylformamide, acetonitrile, amino naphthalenesulfonic acid and hydroxy naphthalenesulfonic acid were improved greatly. The rates of BOD 5/COD Cr of these four model pollutants increase to 23.2%, 55.1%,50.2% and 38.8% respectively after treatment, compared to the original BOD 5/COD Cr rates of 8.4%,1.56%,1.56% and 2.73% respectively. The biodegradability improvement becomes more outstanding with the increase of treating temperature and COD removal rate. It was concluded that SCWO can be used not only for throughly destruction of organic pollutants, but also for pre treatment of difficult biodegradating pollutants.