Abstract：
The use of photocatalysts in continuous stirred tank reactor (CSTR) systems allows for efficient and continuous water treatment, thus meeting the demand for scalable technology and comparative data in large-scale implementations. Hence, this study aims to explore the feasibility of a floating photocatalyst within a CSTR system for continuous water treatment. An expanded polystyrene (EPS)-TiO2 composite was synthesized following established methodologies, and their efficacy in removing the water pollutant methylene blue (MB) was compared for both batch and CSTR systems. A nonlinear first-order model was identified as the most suitable approach to accurately simulate MB degradation under experimental conditions, and the calculated pseudo-first-order degradation rate constant (k\') for the CSTR system (0.0126-0.0172/min) was found to be superior to that observed for the batch system (0.0113/min). In addition, an increase in the flow rate reduced the retention time, leading to lower MB removal efficiency for the CSTR system. In addition, the EPS-TiO2/UV system with a CSTR configuration was found to efficiently use light and energy based on the calculated quantum yield (Φ = 2.86 × 10-4) and electrical energy per order (EEO = 857.46 kWh/m3/order). The findings of this study contribute to the development of sustainable and efficient water treatment strategies, offering valuable insight into the implementation of practical water treatment processes.
摘要：
在连续搅拌釜反应器（CSTR）系统中使用光催化剂可以实现高效和连续的水处理，从而满足大规模实施中对可扩展技术和比较数据的需求。因此，这项研究旨在探索CSTR系统中浮动光催化剂用于连续水处理的可行性。一种发泡聚苯乙烯（EPS）-TiO2复合材料的合成遵循既定的方法，并比较了分批和CSTR系统去除水污染物亚甲基蓝（MB）的功效。非线性一阶模型被确定为在实验条件下准确模拟MB降解的最合适方法，并且发现CSTR系统的计算的伪一级降解速率常数（k\'）（0.0126-0.0172/min）优于分批系统的观察值（0.0113/min）。此外,流量的增加减少了保留时间，导致CSTR系统的MB去除效率较低。此外,根据计算的量子产率（Φ=2.86×10-4）和每阶电能（EEO=857.46kWh/m3/阶），发现具有CSTR配置的EPS-TiO2/UV系统可以有效利用光和能量。这项研究的结果有助于制定可持续和有效的水处理策略，为实际水处理工艺的实施提供有价值的见解。
