1997年，该市选择博伊尔工程公司（Boyle Engineering Corporation，简称博伊尔）调查治疗情况 降低37井出水颜色和硫化氢含量的方法。此外 如果可能的话，需要进行砷还原处理。基于之前对汉福德的 使用氧化、沉淀和专有过滤工艺降低砷含量的水 利用两家制造商（Filtronics，Inc.和Pureflow过滤部门）进行的试点计划已经完成 推荐。 专有过滤过程（PFP）在封闭的容器中使用专有多媒体 压力容器。一般来说，原水在反应容器中使用氯、钠进行预处理 过滤前，亚硫酸氢盐，可能还有三氯化铁。 在这些处理系统中， 锰、硫化氢和砷被氧化。硫化氢被氧化成 硫酸盐。铁和锰以氢氧化物的形式沉淀，吸附砷。这个 添加三氯化铁有助于进一步降低砷含量。砷在溶液中被去除 以铁/砷或锰/砷沉淀物的形式填充介质的压力容器。过滤介质 无需再生，但必须像传统砂滤器一样定期反洗。 反冲洗水被引导至沉淀池，反冲洗水可在沉淀池中进行倾析和过滤 回收到工厂的头上。产生的污泥（有时是整个反洗） 水）可以被排放到下水道或其他地方- 现场污泥干化床。 1997年和2007年期间，Filtronics和Pureflow在37号井进行了多次先导试验 1998年。这些试验的目的是证明处理能力，以满足两个阶段的要求 治疗目标。汉福德独特的两阶段治疗目标 本文讨论了运营目标、水质标准合规性和预算。包括表格、数字。

In 1997, the City selected Boyle Engineering Corporation (Boyle) to investigate treatment methods to reduce the color and the hydrogen sulfide in the water from Well 37. In addition, arsenic reduction treatment was desired if possible. Based on previous pilot testing of Hanford's water for arsenic reduction using oxidation, precipitation, and a proprietary filtration process, a pilot program utilizing two manufacturers (Filtronics, Inc. and Pureflow Filtration Division) was recommended. The proprietary filtration process (PFP) utilizes a proprietary multimedia within an enclosed pressure vessel. In general, raw water is pretreated in a reaction vessel using chlorine, sodium bisulfite, and possibly ferric chloride prior to filtration. In these treatment systems iron, manganese, hydrogen sulfide, and arsenic are oxidized. The hydrogen sulfide is oxidized to sulfate. The iron and manganese are precipitated as hydroxides, adsorbing the arsenic. The addition of ferric chloride assists in further reducing the arsenic. The arsenic is removed in the media-filled pressure vessel as an iron/arsenic or manganese/arsenic precipitate. The filter media requires no regeneration but must be backwashed periodically like a conventional sand filter. The backwash water is directed to a settling tank where the backwash water can be decanted and recycled to the head of the plant. The resulting sludge (and sometimes the entire backwash water) can be disposed of to a sewer or to on-site sludge-drying beds. Multiple pilot tests were performed at Well 37 by both Filtronics and Pureflow during 1997 and 1998. The purpose of these tests was to demonstrate the treatment capabilities to meet two-phased treatment objectives. The two-phased treatment objective unique to Hanford's operational goals, water quality standard compliance, and budget is discussed in this paper. Includes tables, figures.