为应对长期干旱和水源供应减少，该市 威奇托瀑布已经开始了一项资本改善计划，以建设一个新的双阶段 开发所需的膜（微滤和反渗透）水处理厂 历史上被认为不适合作为公共用水的现有地表水供应 供给 膜的使用正在向更复杂的水源水的处理扩展 具有高水平的溶解污染物（DOC、颜色、味道和气味） 物质）和高水平的颗粒物质（浊度、微生物、悬浮物） 固体）。当膜被考虑用于这些更难处理的水时，选择 必须根据预澄清装置工艺的整合来评估直接过滤的效果。 本文介绍了用于选择预处理的中试评估过程和数据 用于设计新的10 MGD双级膜式地表水处理厂的方法 德克萨斯州威奇托瀑布市。讨论了膜先导系统的性能 对于这两种情况:直接给药/过滤和预澄清。核心设计 还介绍了在系统设计过程中开发的系统设备和计算工具 提出了。包括表格、数字。

In response to extended drought conditions and shrinking source water supply, the City of Wichita Falls has begun a capital improvements program to build a new dual-stage membrane (microfiltration and reverse osmosis) water treatment plant necessary to develop an existing surface water supply that was historically considered unfit as a public water supply. The use of membranes is expanding towards the treatment of more complex source waters featuring high levels of dissolved contaminants (DOC, color, taste and odor causing substances) and high levels of particulate material (turbidity, microorganisms, suspended solids). When membranes are considered for these more difficult to treat waters, the choice of direct filtration must be evaluated against integration of a preclarification unit process. This paper presents the pilot evaluation process and data used to select a pretreatment approach used to design the new 10 MGD dual stage membrane surface water plant for the City of Wichita Falls, Texas. The performance of the membrane pilot system is discussed for both scenarios: in direct dosing/filtration and in preclarification. Design of the core system equipment and calculation tools developed during the design of the system is also presented. Includes tables, figures.