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Combination of magnetic field and ultraviolet for fouling control in saline wastewater distribution systems

文献类型： 外文期刊

作者： Liu, Zeyuan 1 ; Xiao, Yang 1 ; Muhammad, Tahir 5 ; Zhou, Yunpeng 1 ; Hou, Peng 1 ; Zha, Yingdong 1 ; Yu, Ruihong 3 ; Qu, Shen 3 ; Ma, Changjian 6 ; Li, Yunkai 1 ;

作者机构： 1.China Agr Univ, Coll Water Resources & Civil Engn, Beijing 100083, Peoples R China

2.Minist Educ, Engn Res Ctr Agr Water Saving & Water Resources, Beijing 100083, Peoples R China

3.Inner Mongolia Univ, Sch Ecol & Environm, Inner Mongolia Key Lab River & Lake Ecol, Hohhot 010070, Peoples R China

4.Minist Educ, Key Lab Mongolian Plateau Ecol & Resource Utilizat, Hohhot 010070, Peoples R China

5.Hohai Univ, Coll Hydrol & Water Resources, Nanjing 210098, Peoples R China

6.Shandong Acad Agr Sci, Inst Agr Resources & Environm, State Key Lab Nutrient Use & Management, Natl Agr Expt Stn Soil Qual Jinan, Jinan, Peoples R China

关键词： Saline wastewater; Biofouling; Particulates; Precipitates; Ultraviolet; Magnetic field

期刊名称：WATER RESEARCH （ 影响因子：12.8； 五年影响因子：13.3 ）

ISSN： 0043-1354

年卷期： 2024 年 251 卷

页码：

收录情况： SCI

摘要： Fouling is a significant challenge for recycling and reusing saline wastewaters for industrial, agricultural or municipal applications. In this study, we propose a novel approach of magnetic field (MaF) and ultraviolet (UV) combined application for fouling mitigation. Results showed, combination of MaF and UV (MaF-UV) significantly decreased the content of biofouling and reduced the complexity of microbial networks, compared to UV and MaF alone treatments. This was due to MaF as pretreatment effectively reduced the water turbidity, improve the influent water quality of UV disinfection and increases UV transmittance, eliminating the adverse impacts of UV scattering and shielding, hence increased the inactivation effectiveness of UV disinfection process. MaF assisted UV also reduced the abundance of UV-resistant bacteria and inhibited the risk of bacterial photoreactivation and dark repair. Meanwhile, MaF-UV drastically reduced the contents of precipitates and particulate fouling by accelerating the transformation rate of CaCO3 crystal from compact calcite to loosen hydrated amorphous CaCO3, and enhancing the flocculation process. These findings demonstrated that MaF-UV is an effective antifouling strategy, and provide insights for sustainable application of saline wastewaters.

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