Sludge reduction has been a key issue in waste activated sludge (WAS) treatment. In this study, composite ferrate solution (CFS) has been used to disintegrate WAS. The results showed that CFS could effectively disrupt sludge flocs and cells and caused the release of intracellular matter such as SCOD, cations and organic acids. These results showed that the sludge disintegration process could be divided into a rapid reaction stage (0–2 h) and a slow reaction stage (2–24 h). It was determined that at a CFS dosage of 50 mg Fe/g SS and a reaction time of 24 h, the sludge reduction was 55.4% and SV and SVI were reduced by 12.1% and 46.4%, respectively. The Fe(VI), ClO⁻ and OH⁻ in CFS all played important roles in sludge decomposition, but they did not have synergistic effects. The small-particle sludge, in situ formed Fe³⁺ and released Ca²⁺ could improve the sludge settleability.

减少污泥一直是废物活性污泥（WAS）处理中的关键问题。在这项研究中，复合高铁酸盐溶液（CFS）已用于分解WAS。结果表明，CFS可以有效地破坏污泥的絮凝物和细胞，并引起诸如SCOD，阳离子和有机酸等细胞内物质的释放。这些结果表明，污泥分解过程可分为快速反应阶段（0–2小时）和慢速反应阶段（2–24小时）。经测定，在CFS剂量为50 mg Fe / g SS和反应时间为24 h的情况下，污泥减少率为55.4％，SV和SVI分别减少了12.1％和46.4％。中的Fe（VI），CLO ^-和OH ^-CFS中的所有元素都在污泥分解中起重要作用，但没有协同作用。原位形成Fe ³⁺并释放Ca ²⁺的小颗粒污泥可提高污泥的沉降性。