水处理厂（WTP）废水残余流的再利用，如过滤器反冲洗水 （FBWW）被视为减少废物流和废水产生的可能途径 优化传统饮用水处理厂的处理性能。整体 本研究的目的是检查回收反冲洗水对环境的潜在影响 混凝沉淀过程中天然有机物（NOM）的去除。具体来说 采用北京两个地表水处理厂的低浊度水源水进行了一系列的罐试验 加拿大新斯科舍省将调查回收未经处理的反冲洗残余水的影响 硫酸铝（如明矾）混凝沉淀中有机物去除的研究 过程。试验中使用了来自两个不同主要处理序列的反冲洗水样 更仔细地研究物理和/或化学凝固影响的实验室规模研究 回收设计中的机制。来自传统过滤厂的FBWW（诺瓦州温莎） 加拿大斯科舍省），其中含有沉淀氢氧化铝（Al（OH）₃）固体和膜 来自微滤厂（加拿大新斯科舍省汉斯波特）的反冲洗水（MBWW） 在研究中使用的主要处理序列中不使用凝固剂。分析 罐测试的沉淀水样包括浊度、颜色、总有机碳（TOC）， 溶解有机碳（DOC）、UV-254、总铝和zeta电位。改进的 本研究在FBWW循环设计下发现的NOM去除表明 去除可能与与再循环相关的电荷中和更密切相关 沉淀氢氧化铝絮体存在于残余流中，而不是纯物理性质的 影响（即碰撞点或压载絮凝物的数量）机制，通过 MBWW回收实验。包括7个参考文献、表格、图表。

The reuse of water treatment plant (WTP) waste residual streams such as filter backwash water (FBWW) is viewed as a possible path towards minimizing the generation of waste streams and optimizing treatment performance in conventional drinking water treatment plants. The overall objective of this study was to examine the potential impact of recycling backwash water on natural organic matter (NOM) removal in coagulation-sedimentation processes. Specifically, a series of jar tests were conducted with low turbidity source water from two surface WTPs in Nova Scotia, Canada to investigate the impact of recycling untreated backwash water residual streams on organic removal in aluminum sulphate (e.g., alum) coagulation-sedimentation processes. Backwash water samples from two different main treatment trains were used in the bench-scale study to more closely examine the influence of physical and/or chemical coagulation mechanisms in recycle designs. FBWW from a conventional filtration plant (Windsor, Nova Scotia, Canada) that contained precipitated aluminum hydroxide (Al(OH)₃) solids and membrane backwash water (MBWW) from a microfiltration plant (Hantsport, Nova Scotia, Canada) that does not use a coagulant within the main treatment train were used in the study. Analysis of the settled water samples from the jar tests included turbidity, color, total organic carbon (TOC), dissolved organic carbon (DOC), UV-254, total aluminum and zeta potential. The improved removal of NOM found in this study under FBWW recycle design indicate that enhanced organic removal may be more closely linked to charge neutralization associated with recycling precipitated aluminum hydroxide flocs present in residual streams as opposed to purely physical impact (i.e., number of collision sites or ballasted flocculation) mechanisms as evaluated with the MBWW recycle experiments. Includes 7 references, table, figures.