Substituted polycyclic aromatic hydrocarbons released from sewage sludge pyrolysis bring the concern of the clean utilization for the waste. Herein, the roles of calcium oxide on the release of these compounds, especially the heavy ones containing nitrogen and oxygen atoms were investigated. The results showed that calcium oxide significantly decreased light substituted polycyclic aromatic hydrocarbons in the volatiles from 450 to 850 °C and showed obvious inhibitory effects on the formation of heavy substituted polycyclic aromatic hydrocarbons at 850 °C. To understand the impact mechanisms, pyrolysis experiments of sludge model compounds lipid, protein and polysaccharides were conducted. It was found that calcium oxide could catalyze or react with all three components to decrease the content of light substituted polycyclic aromatic hydrocarbons. Heavy oxygen-containing aromatics in sludge derived volatiles mainly resulted from polysaccharides and protein, and they considerably decreased after mixing with calcium oxide. Oxygen-containing aromatics content in the lipid derived volatiles, however, would increase due to polymerization reactions. The decreasing release of nitrogen substituted polycyclic aromatic hydrocarbons from sludge could be attributed to the synergy effects of CaO and other minerals or the effects of CaO on the interaction between protein and other organics.

污水污泥热解释放的取代多环芳烃引起了废弃物清洁利用的关注。在此，研究了氧化钙对这些化合物尤其是含氮和氧原子的重化合物释放的作用。结果表明，氧化钙在450~850 ℃下显着降低了挥发物中的轻取代多环芳烃，对850 ℃下重取代多环芳烃的形成有明显的抑制作用。为了了解影响机制，进行了污泥模型化合物脂质、蛋白质和多糖的热解实验。发现氧化钙可以催化或与所有三种组分反应以降低轻取代的多环芳烃的含量。污泥衍生挥发物中的重氧芳烃主要来源于多糖和蛋白质，与氧化钙混合后显着减少。然而，脂质衍生的挥发物中的含氧芳烃含量会由于聚合反应而增加。污泥中氮取代多环芳烃的释放减少可能归因于CaO和其他矿物质的协同作用或CaO对蛋白质与其他有机物之间相互作用的影响。