The recent research for the removal of various pollutants has been triggered towards the realistic approach of the plug flow reactor system. For the first time once through plug flow approaching compound parabolic reactor was employed for the removal of Metronidazole by utilizing in-situ synergistic effect of photo-Fenton and photocatalysis. The novel concept of in-situ dual effect has been introduced through composite prepared of iron-TiO₂ utilizing foundry sand and fuller’s earth (industrial waste) with a coating of TiO₂. For the verification of the plug flow behavior, tanks in series model as well as plug flow model has been employed and validated. With the hydraulic retention time of 15 min, 6 parabolic reactors connected in series, pH 3.0-3.5, H₂O₂ dose of 450 mg L^-1, has led to maximum removal of 60%. 2.19 folds synergy was perceived in case of hybrid effect as compared to individual processes. Additionally, 45- 50% COD reduction accompanying the formation of nitrate, nitrite ions confirmed the mineralization. Retention of dual catalytic activity without much deterioration even after 40 recycles confirms its applications at industrial scale. Scale-up cost trials have also been studied for real time analysis of energy intensive parameters. Various characterizations including XRD, SEM-EDS, Mapping, and FT-IR confirmed the potential of the composite. This research unlocks the new horizon towards the degradation of wastewater employing large scale dual effect.

活塞流反应器系统的现实方法已经引发了有关去除各种污染物的最新研究。首次通过塞流式接近式复合抛物线反应器，利用光芬顿和光催化的原位协同作用，去除了甲硝唑。通过利用铸造砂和富勒土（工业废料）与TiO ₂涂层复合制备铁TiO ₂，引入了原位双重效应的新概念。为了验证塞流特性，已采用并验证了串联模型和塞流模型的储罐。水力停留时间为15分钟，六个串联的抛物线反应器，pH 3.0-3.5，H ₂ O₂剂量为450 mg L ^-1，导致最大去除量为60％。与单个过程相比，在混合效应的情况下，可观察到2.19倍的协同作用。此外，伴随硝酸盐，亚硝酸盐离子的形成，COD减少了45-50％，证实了矿化作用。即使在40次循环后，仍保留了双重催化活性而没有太大的劣化，这证实了其在工业规模上的应用。还研究了按比例放大的成本试验，以实时分析能源密集型参数。包括XRD，SEM-EDS，映射和FT-IR在内的各种表征证实了复合材料的潜力。这项研究开创了采用大规模双重效应降解废水的新视野。