Nuclear Technology Development Center, CDTN, Belo Horizonte, Brazil.
Department of Sanitary and Environmental Engineering, Federal University of Minas Gerais, Belo Horizonte, Brazil.
Environ Technol. 2022 Apr;43(10):1437-1445. doi: 10.1080/09593330.2020.1832584. Epub 2020 Oct 8.
Sunlight-mediated disinfection in wastewater treatment ponds is widely recognised as the main role for disinfection, but pathogen removal can be limited by poor light penetration in the water column. The aim of this research is to evaluate a different and simple type of intervention for improving bacterial disinfection, by placing mid-depth transverse baffles perpendicular to the theoretical flow in an existing shallow maturation pond, aiming at increasing the opportunity for bacteria to receive radiation at the upper layers of the pond. In order to understand the hydrodynamic mechanisms and evaluate the effectiveness of the proposed intervention, a 3D Computational Fluid Dynamic (CFD) model was applied, including the transverse baffles and a particle-tracking model. This was complemented by monitoring in the pond, in the phase before and after inclusion of the transversal baffles. Overall, the transverse baffles increased disinfection efficiency by moulding/re-routing the hydrodynamic flow and increasing microorganism exposure to the sunlight.
阳光介导的污水处理池消毒被广泛认为是主要的消毒方式，但由于水柱中的光穿透性差，病原体的去除可能受到限制。本研究旨在通过在现有的浅层成熟池内垂直于理论水流方向设置中深横向挡板，评估一种不同的简单干预方式来提高细菌消毒效果，以增加细菌在池塘上层接受辐射的机会。为了了解水动力机制并评估所提出的干预措施的有效性，应用了三维计算流体动力学（CFD）模型，包括横向挡板和颗粒跟踪模型。这通过在包括横向挡板之前和之后在池塘中进行监测来补充。总的来说，横向挡板通过塑造/重新引导水动力流并增加微生物对阳光的暴露，提高了消毒效率。
