超临界水氧化技术在城市污泥处理中的应用

Application of the supercritical water oxidation technique to municipal sludge treatment

综述了超临界水氧化(SCWO)技术的基本原理和工艺、在城市污泥处理中应用的国内外研究进展,并就SCWO处理城市污泥的前景作了展望。SCWO技术处理城市污泥,污泥中有机物的去除率可达99.9%以上,污泥氧化后的最终残余固体产物的容积仅为浓缩污泥容积的1.2%左右,反应后剩余收集液的COD质量浓度小于10 mg/L,处理后的残留固体还可以进行磷酸盐和重金属回收。

The principles, process, prospects and application of the supercritieal water oxidation （SCWO） technique for treating municipal sludge is reviewed. The SCWO technique can remove 99.9 % of organic substances, and the COD of residual liquid from treated sludge is less than 10 mg/L. The final volume of residual solid is only 1.2% of the original condensed sludge volume and phosphate and heavy metals can be recovered from it.