In order to evaluate comprehensively the impact of calcium peroxide (CP) on anaerobic digestion (AD) of primary sludge (P-sludge) and secondary sludge (S-sludge) of anaerobic/anoxic/aerobic process, a series of batch experiments were conducted in the lab scale. Results showed that CP pretreatment could kill Fecal Coliform completely in 72.0 h and promote the solubilization of S-sludge more significantly than P-sludge. Compared with the control, the maximum CH₄ production potential and the maximum specific CH₄ production rate of P-sludge AD only increased by 11.2 % and 6.10 %, respectively, but those of S-sludge AD increased by 40.7 % and 58.4 % after the same pretreatment, indicating that CP pretreatment was more conducive to methane production of S-sludge. Moreover, the increase of alkalinity and initial acetate concentration of S-sludge was greater than that of P-sludge after pretreatment according to the process analysis of hydrolysis. Notably, CP pretreatment reduced the PO₄³⁻-P concentration and chromaticity in the AD supernatant of both sludges, which was beneficial to the subsequent treatment of biogas slurry. In addition, CP pretreatment increased the content of total nutrient and decreased the content of harmful heavy metals in both biogas residues. Conclusively, compared with P-sludge, CP pretreatment is more suitable for S-sludge AD. This work firstly provides a comprehensive evaluation of CP pretreatment to waste sludge produced in anaerobic/anoxic/aerobic process of wastewater treatment plant (WWTP), which is of great significance in enriching the pretreatment technology of waste sludge and promoting the application of CP pretreatment in WWTP.

为全面评价过氧化钙（CP）对厌氧/缺氧/好氧工艺初级污泥（P-sludge）和二级污泥（S-sludge）厌氧消化（AD）的影响，进行了一系列批次实验在实验室规模。结果表明，CP预处理可在72.0 h内完全杀灭大肠菌群，对S-污泥的增溶作用比P-污泥更显着。与对照相比，最大 CH ₄生产潜力和最大比 CH ₄P-sludge AD产率仅分别提高了11.2 %和6.10 %，而S-sludge AD产率在相同预处理后分别提高了40.7 %和58.4 %，说明CP预处理更有利于S-污泥。此外，根据水解过程分析，预处理后S污泥的碱度和初始乙酸盐浓度的增加大于P污泥。值得注意的是，CP 预处理降低了 PO ₄ ³⁻-两种污泥AD上清液中的P浓度和色度，有利于沼液的后续处理。此外，CP预处理提高了两种沼渣中总养分的含量，降低了有害重金属的含量。结论是，与P-sludge相比，CP预处理更适合S-sludge AD。本工作首次对污水处理厂（WWTP）厌氧/缺氧/好氧工艺产生的废污泥进行CP预处理进行综合评价，对于丰富废污泥预处理技术，促进CP预处理在污水处理厂的应用具有重要意义。污水处理厂。