粉末活性炭（PAC）是一种行之有效的去除有机污染物的技术 饮用水中的化合物，包括天然有机物（NOM）、味道和气味 化合物和杀虫剂（Karanfil等人，1999年；Treguer等人，2006年）。PAC是 通常在快速混合阶段加入混凝剂，以便 PAC可并入絮凝体中，并与污泥一起去除。然而 虽然这种给药方式可以使PAC与絮体骨料一起去除，但存在一个问题 当PAC包含在溶液中时，可用于吸附的表面积显著减少 絮凝体和PAC与混凝剂之间存在直接竞争，以获得NOM 远离的。 改变给药程序有可能显著改善给药效果 去除总NOM，澄清浊度。 本文关注的是一个实际的操作问题 在英国一家水处理厂（WTWs），并试图解决以下关键问题: PAC剂量: 如何以及在何处投加PAC以实现最佳NOM去除；PAC除凝血外的NOM是什么？这取决于什么 给药位置；和 在后续治疗中如何去除PAC？ 在这些实验中收集并测试了两种水。原水来自 Ewden水处理厂（WTWs）已建成（英国谢菲尔德）。这种水是典型的英国水 棕色的沼地水，溶解有机碳含量高，含水量低 碱性和低浊度。凝结后还收集了来自同一水处理厂的水 溶解气浮（DAF）。 测试了三种PAC:两种Chemviron Pulsorb（Pulsorb C和Pulsorb 207 CP90），以及 Norit SA Super）。通过评估三种PAC炭的吸附能力，对其进行了测试 在PAC剂量范围内和六种不同pH下去除NOM。将生的和凝固的NOM添加到锥形烧瓶（250 mL）中。在不同浓度和浓度下给药PAC 在不同pH水平下为80 mg/L。进行了6个小时的吸附 吸附达到平衡。每种情况都进行了三次。 对这两种水类型进行了试验，以确定使用PAC和 使用罐子测试仪（Phipps和Bird）进行凝固。使用的混凝剂是硫酸铁（Ferripol） 四十） 并在pH值为4.0的情况下，以预先确定的该水的最佳剂量（10 mg/L）投加。PAC是 以20 mg/L的剂量给药。试验了一系列混凝剂PAC给药方案。包括5个参考文献、表格、图表。

Powdered activated carbon (PAC) is a well proven technology for removal of organic compounds from drinking water including natural organic matter (NOM), taste and odor compounds and pesticides (Karanfil et al., 1999; Treguer et al., 2006). PAC is normally added during the rapid mix stage along with the coagulant during coagulation so that the PAC can be incorporated into the floc and be removed along with the sludge. However, while this dosing regime enables the PAC to be removed with the floc aggregates, there is a significant reduction in the surface area available for adsorption when the PAC is contained in the floc and there is direct competition between the PAC and coagulant for the NOM being removed. Alteration of the dosing procedure has the potential of providing a significant improvement in the overall NOM removed and the clarified turbidity. This paper focuses on a real operational problem at a United Kingdom water treatment works (WTWs) and attempts to address the following key questions for PAC dosing: how and where should PAC be dosed for optimum NOM removal; what NOM does PAC remove over and above coagulation and is this dependent on dosing position; and, how is PAC removed during subsequent treatment? Two waters were collected and tested during these experiments. Raw water from Ewden water treatment works (WTWs) was taken (Sheffield, United Kingdom). This water is typical of a United Kingdom brown colored moorland water being of high dissolved organic carbon content and low alkalinity and low turbidity. Water from the same WTWs was also collected after coagulation and dissolved air flotation (DAF). Three PAC were tested: two types of Chemviron Pulsorb (Pulsorb C and Pulsorb 207 CP90, and Norit SA Super). The adsorption capacity of the three PAC carbons was tested by assessing NOM removal at a range of PAC doses and at six different pH. Raw and coagulated was added to a conical flask (250 mL). PAC was dosed at various concentrations and 80 mg/L at various pH levels. Adsorption was left for 6 hours, the time taken for adsorption to reach equilibrium. Each condition was carried out in triplicate. The two water types were tested on to determine the optimum removal of NOM using PAC and coagulation using a jar tester (Phipps and Bird). The coagulant used was ferric sulphate (Ferripol XL) and was dosed at a pre-determined optimum for this water at 10 mg/L at pH 4.0. PAC was dosed at 20 mg/L. A range of coagulant PAC dosing protocols were tested. Includes 5 references, tables, figures.