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Treatment of rural wastewater by infiltration percolation process using sand-clay fortified by pebbles

机译：卵石强化砂土的渗透渗滤工艺处理农村污水

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摘要

The quest for simple, low-cost and high-performance decentralized wastewater treatment system for rural application in developing nation necessitated this study. The ability of sand-clays fortified by pebbles in rural wastewater treatment was investigated in this article. Clay samples, collected from northeastern Tunisia, were characterized by studying the mineralogical and geochemical composition using X-ray diffractometer and atomic absorption spectro-photometer, respectively. Permeability studies were conducted to determine the best combination ratio (3:1) of sand-clay/pebbles. The sand-clay mixture, containing 90% of sand and 10% of clay by weight and fortified with pebbles in a ratio of 3:1, this reconstituted sand filter, gave the optimum wastewater purification and appropriate permeability, the values are 2.18 × 10~(-6) m/s for no fortified sand-clay and 2.29 × 10~(-5) m/s for fortified sand-day in ratio 3:1. The performance efficiency of the fortified column was studied and the results showed a decrease of nitrogen (65%), biochemical oxygen demand (75%), chemical oxygen demand (73%), and bacteria such as fecal coliform (0.7Ulog), fecal streptococci (4Ulog), and total bacteria (2Ulog).
机译：对发展中国家农村应用简单，低成本，高性能的分散式废水处理系统的追求使这项研究成为必要。本文研究了用卵石强化的砂粘土在农村污水处理中的能力。通过分别使用X射线衍射仪和原子吸收分光光度计研究矿物学和地球化学组成，对从突尼斯东北部收集的粘土样品进行了表征。进行了渗透性研究，以确定砂土/卵石的最佳组合比（3：1）。这种砂土混合物含有重量比为90％的沙子和10％的粘土，并以3：1的比例用卵石强化，这种经重组的砂滤器提供了最佳的废水净化和适当的渗透性，值为2.18×10无强化砂土的〜（-6）m / s和强化砂日的2.29×10〜（-5）m / s的比率为3：1。研究了强化柱的性能效率，结果显示氮减少了（65％），生化需氧量（75％），化学需氧量（73％）和粪便大肠菌群（0.7Ulog），粪便等细菌减少了链球菌（4Ulog）和总细菌（2Ulog）。

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  • 来源
    《Desalination and water treatment》 |2012年第3期|65-73|共9页
  • 作者

    Saifeddine Eturki; Fadhila Ayari; Hamadi Kallali; Naceur Jedidi; Hamed Ben Dhia;

  • 作者单位

    Wastewater Treatment Laboratory, Water Research and Technologies Center, Borj Cedria Techno Park, BP 273, Soliman 8020, Tunisia,Water, Energy and Environment Laboratory, National School of Engineers of Sfax, Road of Soukra, Sfax 3038, Tunisia;

    Wastewater Treatment Laboratory, Water Research and Technologies Center, Borj Cedria Techno Park, BP 273, Soliman 8020, Tunisia;

    Wastewater Treatment Laboratory, Water Research and Technologies Center, Borj Cedria Techno Park, BP 273, Soliman 8020, Tunisia;

    Wastewater Treatment Laboratory, Water Research and Technologies Center, Borj Cedria Techno Park, BP 273, Soliman 8020, Tunisia;

    Water, Energy and Environment Laboratory, National School of Engineers of Sfax, Road of Soukra, Sfax 3038, Tunisia;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Wastewater treatment; Infiltration percolation; Fortified sand-clay; Pebbles; Rural effluent; Column;

    机译：废水处理;渗透渗滤;强化沙土;鹅卵石农村污水;柱;

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