此powerpoint演示文稿概述了俄亥俄州南部格林县工厂的一项中试规模过滤器研究。提供了背景信息的简要概述，包括:超过一半（28微克/升）的砷 过滤器是可溶的； 超过一半（23微克/升）的砷进入 过滤器为As（III）形式； 意外且无法解释的砷去除 通过过滤，无强氧化剂； As（V）在过滤废水中占主导地位；和 完全硝化作用发生在过滤器中。研究目标包括:确定过滤器中的砷发生了什么；确定 更换现有过滤介质对环境的影响 脱砷和氨氧化；然后，确定 让新过滤器上线的最佳方式 达到之前的生物活性。主要试点研究结论: 微生物积累和完全硝化 （NH3-NO3）在所有先导过滤器中均在71天内达到； 两种播种方法之间没有显著差异 柱； 砷（III）在氧化过程中显著氧化为砷（V） 过滤（可溶性As（III）含量大于80%） 启动后； 过滤去除了75%以上的总砷 （推测是通过铁吸附砷[V]）； 残留砷主要以砷的形式存在 可溶性As（V）；和 启动时，先导系统有效地去除了铁。包括表格、数字。

This powerpoint presentation outlines a pilot scale filter study at the Greene County, Ohio, South Plant. A brief overview of background information is provided, including: more than half (28 µg/L) of the arsenic entering filter is soluble; more than half (23 µg/L) of the arsenic entering the filter is in As(III) form; unexpected and unexplained removal of arsenic through filter, no strong oxidant; As(V) dominates filter effluent; and, complete nitrification takes place in filter. Objectives of the study included: determine what was happening to the arsenic in the filter; determine the impact of replacing existing filter media on arsenic removal and ammonia oxidation; and, determine the best way to bring new filters on-line to achieve previous biological activity. Key pilot study conclusions: microbiological accumulation and complete nitrification (NH3 - NO3) was achieved in all pilot filters by 71 days; no significant difference between methods of seeding columns; significant oxidation of As (III) to As (V) occurs during filtration (greater than 80% of soluble As (III) ) shortly after start-up; filtration removes greater than 75% of total arsenic (presumably by iron adsorption of As [V]); residual arsenic is predominantly in the form of soluble As (V); and, iron was effectively removed by pilot system at start-up. Includes tables, figures.