Department of Environmental Health Engineering, School of Public Health, Research Centre for Health Sciences, Hamadan University of Medical Sciences, Hamadan, Iran.
Department of Chemistry, University of Kurdistan, Sanandaj, Kurdistan, Iran.
Sci Rep. 2023 Jun 21;13(1):10102. doi: 10.1038/s41598-023-37167-0.
Increased levels of nutrients and algae can cause drinking water problems in communities. Harmful algal blooms affect humans, fish, marine mammals, birds, and other animals. In the present study, we investigated the use of a combined system [Hydrodynamic Cavitation, Ozone (O), and Hydrogen Peroxide (HO)] on the removal of Chlorophyll a and Organic substances in the raw water was investigated. The Effect of different operating conditions such as pH, cavitation time, pressure, distance, flow rate, ozone dose, and hydrogen peroxide concentration was studied. Utilizing the Taguchi design method, experiments were planned and optimized. The combined system treatment yielded a maximum reduction in Chlorophyll a and Total Organic Carbon (TOC) at an optimum condition of pH 5, cavitation pressure 5 bar, flow rate of 1 m/h, a distance of 25 cm from the orifice plate, O 3 g/h and 2 g/l of HO concentrations. The most efficient factor in the degradation of TOC and Chlorophyll a, was cavitation pressure based on the percentage contributions of each parameter (38.64 percent and 35.05 percent, respectively). HO was found to have the most negligible impact on degradation efficiency (4.24 percent and 4.11 percent, respectively).
营养物质和藻类水平的增加会导致社区饮用水出现问题。有害藻类大量繁殖会影响人类、鱼类、海洋哺乳动物、鸟类和其他动物。在本研究中，我们研究了联合系统[空化、臭氧 (O) 和过氧化氢 (HO)]在去除原水中叶绿素 a 和有机物质方面的应用。研究了不同操作条件（如 pH 值、空化时间、压力、距离、流速、臭氧剂量和过氧化氢浓度）的影响。利用田口设计方法，对实验进行了规划和优化。在最佳条件下（pH 值为 5、空化压力为 5 巴、流速为 1 m/h、孔板距离为 25 cm、O3 剂量为 3 g/h 和 HO 浓度为 2 g/l），联合系统处理可使叶绿素 a 和总有机碳 (TOC) 的去除率达到最大值。在 TOC 和叶绿素 a 的降解中，空化压力是最有效的因素，根据每个参数的贡献率（分别为 38.64%和 35.05%）。过氧化氢对降解效率的影响最小（分别为 4.24%和 4.11%）。
