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Reduction of hydrogen sulfide gas in a small wastewater collection system using sodium hydroxide

机译:使用氢氧化钠在小型废水收集系统中还原硫化氢气体

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摘要

The Kennebunk Sewer District collection system experienced H2S-induced corrosion downstream of terminus manholes for the Wells Road and Boothby Road pumping stations. An automated odor control system using sodium hydroxide (NaOH) was developed to mitigate further corrosion. System performance was quantified by recording the [H2S] in the terminus manholes before and after NaOH treatment. Preliminary evaluation at the Wells Road facility demonstrated significant (p 0.001) reduction in the average [H2S] between the treatment (4.8 +/- 0.3 ppm) and control (67 +/- 1.5 ppm). Permanent systems installed at both facilities in 2017 yielded similar positive results. The average [H2S] in the Wells and Boothby Road terminus manholes reduced from 89.4 +/- 1.0 to 8.0 +/- 0.1 ppm and from 7.9 +/- 0.2 to 0.82 +/- 0.06 ppm, respectively. This work demonstrates the ability of the NaOH system presented here to minimize emission of corrosive H2S gas in small collection systems. (C) 2019 Water Environment Federation
机译:肯纳邦克污水处理区的收集系统在韦尔斯路和布斯比路泵站的总站人孔下游经历了硫化氢引起的腐蚀。开发了使用氢氧化钠(NaOH)的自动气味控制系统以减轻进一步的腐蚀。通过在NaOH处理之前和之后在总井口记录[H2S]来量化系统性能。在Wells Road设施进行的初步评估显示,处理(4.8 +/- 0.3 ppm)和对照(67 +/- 1.5 ppm)之间的平均[H2S]显着降低(p <0.001)。 2017年在这两个工厂安装的永久系统产生了相似的积极成果。 Wells和Boothby Road总站沙井中的平均[H2S]分别从89.4 +/- 1.0降至8.0 +/- 0.1 ppm和从7.9 +/- 0.2降至0.82 +/- 0.06 ppm。这项工作证明了此处介绍的NaOH系统能够最大程度地减少小型收集系统中腐蚀性H2S气体的排放。 (C)2019水环境联合会

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