城市污泥中甾类在堆肥、消化过程中的稳定性

在应用气相色谱-质谱仪联机检测技术（GC/MS）对深圳、广州两地城市污泥中甾类污染物进行检测的基础上，研究污泥堆肥、消化过程中甾类的转化、降解稳定性。研究结果表明，深圳和广州两地城市污泥中含有丰富的甾类污染物，主要来源于家庭生活污水，且以动物来源甾类为主，植物和酵母细菌来源次之。好氧堆肥对广州污泥和厌氧消化对深圳污泥中大部分甾族化合物均有明显的降解作用。好氧堆肥并不能促进甾醇中稳定组分甾酮的转化，厌氧消化亦不能使甾酮丰度降低。这表明有环境微生物介入的转化、降解作用与化合物本身的化学稳定性并不一定吻合。

Sources of Steroids in Municipal Sludges and Their Stabilitiesduring Aerobic Composting and Anaerobic Digestion.

The source of steroid pollutants in two municipal sl udges: G from Guan gzhou and S from Shenzhen, and the stabilities of sterols, the precursor compoun d of steroids in the sludges, aerobic composting and anaerobic digestion were in vestigated. Domestic waste and wastewater was found to be the main source respon sible for the abundant steroids present in the two original sludges G and S, whi le petrochemical industrial contribution is negligible. Anaerobic digestion and aerobic composting were effective in degrading most of the steroids. However, mu ch contrary to the relative chemical stabilities of sterols and sterones, anaero bic composting can't increase the relative percentage of sterones in the ste roid s, indicating that microbe-mediated steroid transformational degradation might b e very different from a pure chemical stability-controlled one.