威尔明顿市的斯威尼水处理厂（SWTP）处理一个具有挑战性的水资源 水源（Cape Fear River）采用一系列水处理工艺，包括臭氧氧化和 生物过滤。生物过滤过程具有满足过滤要求的双重目的 浊度和生产效率要求，以及通过吸附去除有机物的要求 以及生物降解。生物过滤器是带有颗粒活性炭（GAC）的双介质过滤器 在硅砂上。选择GAC而不是无烟煤是因为它提供了额外的屏障 防止水中产生味道和气味（T&O）的化学物质。 该工厂目前使用沥青基GAC，自1997年开始使用。GAC已经 在过滤和生物去除方面表现良好。然而，这座城市对此很感兴趣 在确定其他类型的GAC材料的性能是否与 沥青GAC。如果用其他材料制成的GAC也有同样的表现，那么该市的 广汽的供应商将大幅增加。NORIT同时供应褐煤GAC和沥青 GAC，但褐煤GAC是他们的主要产品。诺瑞特也有兴趣确定自己的表现有多好 褐煤GAC将发挥生物过滤作用。诺瑞特联系了斯威尼水处理厂的工作人员 并共同资助了一项全面的研究，以比较褐煤GAC和沥青GAC在不同环境中的差异 生物过滤模式。与沥青GAC相比，褐煤GAC的一个优点是其密度较低。这 转化为比沥青GAC更低的反洗水流量，以实现 同样的反洗效率，这反过来又转化为泵送能源和水资源的节约 浪费的水。 这项全面研究是在2001年6月至2002年7月期间进行的。会议的目标 研究结果如下: 比较褐煤活性炭和沥青活性炭的生物过滤性能； 确定褐煤GAC过滤器的反洗速度是否低于沥青GAC过滤器，且不会影响性能；和 收集有关两种GAC性能的长期运营数据，以备会议使用 浊度去除和过滤器运行时间的过滤要求。 包括表格、数字。

The City of Wilmington's Sweeney Water Treatment Plant (SWTP) treats a challenging water source (Cape Fear River) using a series of water treatment processes, including ozonation and biofiltration. The biofiltration process serves the dual purpose of meeting the filtration requirements for turbidity and production efficiency, and organics removal via adsorption and biodegradation. The biofilters are dual-media filters with granular activated carbon (GAC) over silica sand. GAC was chosen over anthracite because it provides an additional barrier against chemicals that cause taste-and-odor (T&O) in the water. The plant currently uses bituminous-based GAC that has been in place since 1997. The GAC has performed well in both filtration and biological BOM removal. However, the City was interested in determining whether other types of GAC material would perform as well as or better than the bituminous GAC. If GAC made from other material performs as well, then the City's options for GAC suppliers would increase substantially. NORIT supplies both lignite GAC and bituminous GAC, but lignite GAC is their main product. NORIT was also interested in determining how well lignite GAC would perform in a biofiltration role. NORIT contacted the staff of the Sweeney WTP and jointly funded a side-by-side full-scale study to compare lignite GAC to bituminous GAC in a biofiltration mode. One benefit of lignite GAC over bituminous GAC is its lower density. This translates into a lower backwash water flow rate compared to bituminous GAC to achieve the same backwashing efficiency, which in turn translates into savings in pumping energy and wasted water. This full-scale study was conducted between June 2001 and July 2002. The objectives of the study were as follows: compare the performance of lignite GAC to that of bituminous GAC for biofiltration; determine whether lignite GAC filters can be backwashed at a lower rate than bituminous GAC filters without compromising performance; and, collect long-term operational data on the performance of both GAC types for meeting the filtration requirements for turbidity removal and filter runtimes. Includes tables, figures.