Ozone treatment has been proven as an effective technology for removing PAHs in municipal sewage sludge. However, given the complex interaction of PAHs with sludge extracellular polymeric substances (EPS), effective sludge disintegration is required to make PAHs more accessible to oxidants, which also affects PAHs partitioning. Here, we investigated two treatment systems, namely ozonation (ozone) and sequential hydrodynamic cavitation and ozonation (HC+ozone), under varied conditions, to determine whether the extent of sludge disintegration can estimate a measurable removal of PAHs. The results showed that both the PAHs removal efficiency and kinetics highly depended on pH and ozone dose. Although no significant removal of PAHs occurred during HC treatment, the observed rate constants for Σ₁₆ PAHs removal in HC+ozone system were 1.2–1.4-fold higher than those obtained in ozone system under the same condition. The accelerated PAHs removal could be attributed to the reduced flocs size (80% smaller) and increased soluble EPS concentration (5-fold higher) with HC pretreatment. Lastly, a positive correlation was noted between the PAHs removal efficiency and soluble EPS concentration (R² = 0.85), indicating the important role of dissolved and colloidal matter (DCM) for PAHs partitioning between aqueous and particulate phases.

臭氧处理已被证明是去除市政污水污泥中多环芳烃的有效技术。但是，考虑到PAHs与污泥细胞外聚合物（EPS）的复杂相互作用，需要有效的污泥分解才能使PAHs更容易被氧化剂利用，这也影响了PAHs的分配。在这里，我们研究了两种处理系统，即臭氧化（臭氧）和顺序的水力空化和臭氧化（HC +臭氧），在不同的条件下，以确定污泥分解的程度是否可以估算出可测量的多环芳烃去除量。结果表明，PAHs的去除效率和动力学都高度依赖于pH和臭氧剂量。虽然HC处理过程中没有发生显著去除多环芳烃，观察到的速率常数Σ ₁₆在相同条件下，HC +臭氧系统中的PAHs去除率比臭氧系统中的PAHs高1.2-1.4倍。通过HC预处理，絮凝物尺寸减小（减小了80％）和可溶性EPS浓度增加（高了5倍）可以促进PAHs的去除。最后，注意到PAHs去除效率与可溶性EPS浓度之间存在正相关关系（R ² = 0.85），表明溶解和胶体物质（DCM）对于PAHs在水相和颗粒相之间分配的重要作用。