本文讨论了通过使用某些处理工艺提高钠浓度的方法，并提出了通过减少总溶解固体来降低钠水平的替代技术。包括离子交换和石灰-纯碱软化、pH值调整、腐蚀控制、消毒、氟化、混凝、反渗透、蒸馏、电渗析和混合。包括34个参考文献、表格、图表。

This paper discusses the ways in which sodium concentrations are increased through the use of certain treatment processes and suggests alternative techniques for reducing sodium levels via reduction of total dissolved solids. Ion exchange and lime-soda ash softening, pH adjustment, corrosion control, disinfection, fluoridation, coagulation, reverse osmosis, distillation, electrodialysis, and blending are covered. Includes 34 references, tables, figures.