The batik industry produces large volumes of wastewater with high organic content. Dyes in batik wastewater are difficult to degrade by biological processes. Therefore, further processing is needed to reduce pollutants before being released into the environment. This study aims to observe the performance of the ultrasonic cavitation, ozonation, and combination of ozonation/ultrasonic cavitation to treat batik wastewater, which was first given a coagulation-flocculation pre-treatment with Polyaluminium Chloride (PAC) coagulants. The variations applied were ultrasonic intensity (20%, 30%, and 60%) and pH of wastewater (4, 7, and 10). In this study, it was found that the combination of the ozonation/ultrasonic cavitation method with a pH of 4 and ultrasonic intensity of 20% produced the best performance, namely COD, TSS, and color (Pt-Co) removal of 77.02%, 95.15%, and 94.88%. The ultrasonic intensity and initial pH of wastewater played an important role in the performance of the treatment process. In the ultrasonic cavitation method with an ultrasonic intensity of 20%, the highest percentage of COD, TSS, and color (Pt-Co) removal was 65.59%, 91.51%, and 93.41%. The ozonation method in acidic conditions (pH 4) produced a better performance with COD, TSS, and color (Pt-Co) removal of 70.51%, 94.35%, and 96.10% for 60 minutes.

蜡染行业产生大量有机物含量高的废水。蜡染废水中的染料很难通过生物过程降解。因此，在排放到环境中之前，需要进一步处理以减少污染物。本研究旨在观察超声空化、臭氧化和臭氧化/超声空化联合处理蜡染废水的性能，该废水首先使用聚合氯化铝 (PAC) 混凝剂进行混凝-絮凝预处理。应用的变化是超声波强度（20%、30% 和 60%）和废水的 pH 值（4、7 和 10）。在本研究中，发现 pH 值为 4 和超声波强度为 20% 的臭氧化/超声空化方法的组合产生了最佳性能，即 COD、TSS、和颜色 (Pt-Co) 去除率分别为 77.02%、95.15% 和 94.88%。废水的超声波强度和初始 pH 值对处理过程的性能起着重要作用。在超声强度为 20% 的超声空化法中，COD、TSS 和颜色 (Pt-Co) 去除率最高，分别为 65.59%、91.51% 和 93.41%。酸性条件 (pH 4) 下的臭氧化方法产生了更好的性能，COD、TSS 和颜色 (Pt-Co) 去除率分别为 70.51%、94.35% 和 96.10%，持续 60 分钟。