The drilling waste sludge, as a colloidal suspension, would cause secondary pollution to environment if it’s inappropriately disposed. Dewatering pretreatment could reduce the volume and costs before final disposal. In this study, ultrasonic and potassium permanganate (KMnO₄) co-treatment was investigated in drilling waste sludge dewatering pretreatment. The results showed that the water content (WC) was significantly reduced to 27.09%, and the dewatering time and SRF decreased by 46.67% and 17.68% after pretreating by 60 W of US and 12 mg/g DS (dry solid) of KMnO₄ in 5 min. The volatile suspended solid (VSS) solubilization revealed that KMnO₄ could easily disintegrated organic matters and further elevated VSS solubilization to 41.05% with the assistance of US. The mechanistic investigation illustrated that ultrasonic helped decompose sludge flocs and KMnO₄ further oxidized recalcitrant organic matters, consequently enhancing sludge dewatering performance. In addition, the electrostatic repulsion was reduced and Zeta potential was elevated, which prompted particle size, flocculation and viscosity of drilling waste sludge. After US+KMnO₄ pretreatment, the electronegativity, flocculation, hydrophobicity, and porous structure were strengthened, which enhanced the dewaterability of drilling waste sludge. The result in this study illustrates that ultrasonic and KMnO₄ co-treatment is efficacious in drilling waste sludge dewatering pretreating.

钻井废泥为胶体悬浮液，处理不当会对环境造成二次污染。脱水预处理可以减少最终处置前的体积和成本。在这项研究中，超声波和高锰酸钾（KMnO ₄）协同处理在钻井废污泥脱水预处理中进行了研究。结果表明，经60 W US和12 mg/g DS（干固体）KMnO ₄预处理后，含水量（WC）显着降低至27.09%，脱水时间和SRF分别降低46.67%和17.68%在 5 分钟内 挥发性悬浮固体 (VSS) 增溶表明 KMnO ₄在美国的帮助下，可以很容易地分解有机物，并进一步将 VSS 溶解度提高到 41.05%。机理研究表明，超声波有助于分解污泥絮体，KMnO ₄进一步氧化顽固的有机物，从而提高污泥脱水性能。此外，静电斥力降低，Zeta电位升高，促使钻井废泥的粒径、絮凝和粘度增加。US+KMnO ₄预处理后，电负性、絮凝性、疏水性和多孔结构得到加强，提高了钻井废泥的脱水能力。本研究结果表明，超声波和 KMnO ₄ 协同处理在钻井废污泥脱水预处理中是有效的。