Sludge dewaterability is commonly poor due to the hydrophilic biopolymeric substances. The highly efficient oxidation process is of great significance for extracellular biopolymers disintegration and bound water discharge. This work investigated the novel CaO₂-enhanced peroxone (CaO₂/O₃) process to adjust sludge characteristics for dewaterability enhancement and focused on the molecular composition and transformation of dissolved organic matters (DOM). CaO₂/O₃ (60/40 mg/gTS (total solid)) treatment showed more powerful sludge solubilization of 57.8% and cell death proportion of 46.1% over single CaO₂ or O₃ treatment. Hydrophilic extracellular polymeric substances, especially protein-like substances, were substantially degraded, and their conformation turned to be more hydrophobic, and carbohydrate-like, aminosugars-like, and lignins-like substances increased in CaO₂/O₃ process. Meanwhile, CaO₂/O₃ handling resulted in more decomposition of CHO-containing compounds than N-containing or S-containing compounds. Subsequently, 60 mg/gTS PFS (polyferric sulfate) reflocculation exerted a strengthened role in eliminating proteins & lipids-like, lignins-like, and unsaturated hydrocarbons-like substances, and especially S-containing compounds, which compensated for the unsatisfactory removal effects of these substances in the CaO₂/O₃ oxidation process. Therefore, the CaO₂/O₃-PFS treated sludge with less hydrated DOM easily harvested deep-dewatering in pressure filtration. Furthermore, it was noteworthy that the presence of CaO₂ created an alkaline environment and served as the source of sustained-release H₂O₂, which accelerated O₃ decomposition and greatly improved ^•OH generation. These findings provided molecular insight into a novel sludge conditioning approach for ideal dewaterability based on the CaO₂-enhanced peroxone process in sludge treatment.

由于亲水性生物聚合物，污泥脱水性通常很差。高效的氧化过程对于细胞外生物聚合物的分解和结合水的排放具有重要意义。本工作研究了新的 CaO ₂增强过氧酮 (CaO ₂ /O ₃ ) 工艺以调整污泥特性以增强脱水性，并重点研究溶解有机物 (DOM) 的分子组成和转化。CaO ₂ /O _{3 (60/40 mg/gTS (总固体))处理显示出比单一CaO 2}或O ₃更强的57.8%的污泥溶解和46.1%的细胞死亡比例治疗。_{在CaO 2} /O ₃过程中，亲水性胞外聚合物，尤其是类蛋白质物质，被大量降解，构象变得更加疏水，类碳水化合物、类氨基糖和类木质素物质增多。同时，CaO ₂ /O ₃处理导致含CHO化合物比含N或含S化合物分解更多。随后，60 mg/gTS PFS（聚合硫酸铁）再絮凝在去除蛋白质和脂类、木质素类和不饱和烃类物质，尤其是含硫化合物方面发挥了加强作用，弥补了对去除效果不理想的影响。 CaO ₂中的这些物质/O ₃氧化过程。因此，CaO ₂ /O ₃ -PFS处理的水化DOM较少的污泥在压滤深度脱水时容易收获。此外，值得注意的是，CaO ₂的存在创造了碱性环境，并作为缓释H ₂ O ₂的来源，加速了O ₃的分解，大大改善了^• OH 的生成。_{这些发现为基于 CaO 2}增强过氧酮工艺的污泥处理中理想脱水性的新型污泥调理方法提供了分子见解。