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Assessment of sulfide production in a full scale wastewater sludge rising main

机译:大型废水污泥中硫化物产量的评估主要依据

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摘要

Production and build-up of sulfide in wastewater systems, especially downstream of rising mains, may lead to severe odour nuisance, toxic environments and high risk of corrosion. Due to increased population migration towards cities and lower area availability for treatment facilities, rising mains for the conveyance of wastewater sludge are becoming more frequent, and research on sulfide build-up in such cases is needed. In this paper the findings of the work carried out in a full scale wastewater sludge rising main, operated during different seasons and under distinct conditions are presented (comprising both the start-up and normal operation stages of the facility). Results showed a sulfide build-up rate of 3.24 g S−2m−2d−1in the summer and of 2.30 g S−2m−2d−1during the winter. The ratio of sulfate reduction to sulfide production (SO4−2/S−2) was of roughly 3 to 1, as expected. Furthermore, obtained results allowed adjusting a second order polynomial empirical equation for the forecasting of sulfide build-up within the sludge rising main. The obtained equation for sludge significantly differs from existing equations obtained for wastewater. Moreover, this work also allowed obtaining new insight into the positive influence of biofilm and hydraulic retention time in the biological sulfide generation, as well as into its variation along the length of the rising main.
机译:废水系统中硫化物的产生和积累,尤其是在干线上升的下游,可能导致严重的臭味,有毒的环境和极高的腐蚀风险。由于人口向城市的迁移增加以及处理设施的可利用性降低,废水污泥输送的干线越来越频繁,因此需要研究这种情况下硫化物的积累。在本文中,介绍了在不同季节和不同条件下运行的全尺寸污泥上升总管中所进行工作的结果(包括设施的启动和正常运行阶段)。结果显示,夏季硫化物积累率为3.24 g S−2m−2d−1,冬季为2.30 g S−2m−2d−1。如预期的那样,硫酸盐还原与硫化物生成的比率(SO2-4 / S-2)大约为3:1。此外,获得的结果允许调整二阶多项式经验方程,以预测污泥上升主管道内的硫化物累积。所获得的污泥方程与现有的废水方程显着不同。此外,这项工作还使人们对生物膜和水力停留时间对生物硫化物产生的积极影响以及其沿上升主管道长度的变化有了新的认识。

著录项

  • 来源
    《Journal of Environmental Management》 |2018年第1期|505-514|共10页
  • 作者单位

    CERIS, Civil Engineering Research and Innovation for Sustainability, Instituto Superior Técnico, University of Lisbon;

    CERIS, Civil Engineering Research and Innovation for Sustainability, Instituto Superior Técnico, University of Lisbon;

    CERIS, Civil Engineering Research and Innovation for Sustainability, Instituto Superior Técnico, University of Lisbon;

    Águas do Vale do Tejo, S.A., Guia Department;

    CERIS, Civil Engineering Research and Innovation for Sustainability, Instituto Superior Técnico, University of Lisbon;

  • 收录信息 美国《科学引文索引》(SCI);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Biofilm; Odor control; Sludge handling; Sulfate reducing bacteria; Sulfide build-up;

    机译:生物膜;气味控制;污泥处理;硫酸盐还原菌;硫化物积累;
  • 入库时间 2022-08-17 13:31:53

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