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首页> 外文期刊>Journal of Hazardous Materials >Comparative study of Fenton, Fe~(2+) /NaOCl and Fe~(2+)/(NH_4)_2S_2O_8 on tannery sludge dewaterability, degradability of organics and teachability of chromium
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Comparative study of Fenton, Fe~(2+) /NaOCl and Fe~(2+)/(NH_4)_2S_2O_8 on tannery sludge dewaterability, degradability of organics and teachability of chromium

机译：FENTON，Fe〜（2+）/ NaOCL和Fe〜（2 +）/（NH_4）_2S_2O_8对鞣制污泥脱水性，有机性可降解性和铬的可降解性的比较研究

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摘要

In this work, a comparative analysis of Fenton, Fe2+/NaOCl and Fe2+/(NH4)(2)S2O8 assisted advanced oxidation processes was carried out to study its efficacy in enhancing tannery chemical sludge dewaterability. Experimental results showed that, after conditioning of sludge at optimum pH, oxidant and catalyst dosage, capillary suction time (CST) was decreased by 75 +/- 5 % and moisture content of sludge cake (M.Ccake) was reduced to 74 +/- 2 % for all processes at 10 min reaction time. Among the three processes, Fe2+/(NH4)(2)S2O8 process was noted to have larger impact on the breakdown of sludge cells, which is reflected in terms of its highest amount of total organic carbon, protein and total dissolved solids present in the separated sludge fractions. In addition, Fe2+/(NH4)(2)S2O8 process was also observed to leach out largest fraction say 73.3 % of chromium present in the raw sludge into the treated sludge filtrate. The investigation carried out through zeta potential and scanning electron microscopy reveals the role of a two-step mechanism, namely oxidation followed by coagulation in enhancing the sludge dewaterability. Further studies on the possibility of utilizing dried treated sludge as biomass fuel could be carried out.
机译：在这项工作中，对Fenton，Fe2 + / NaoCl和Fe2 + /（NH4）（2）S2O8辅助先进的氧化方法进行了对比分析，以研究其在增强制革的化学污泥脱水性方面的功效。实验结果表明，在最佳pH值下调节污泥，氧化剂和催化剂剂量时，毛细管吸入时间（CST）降低75 +/- 5％，污泥饼（M.CAKE）的水分含量降低至74 + / - 在10分钟的反应时间内所有过程的2％。在这三种方法中，注意到FE2 + /（NH4）（2）S2O8过程对污泥细胞的崩解产生较大影响，其在其最高量的总有机碳，蛋白质和存在于中的总溶解固体方面反映分离的污泥级分。此外，还观察到Fe2 + /（NH4）（2）S2O8过程以浸出最大​​的分数，例如将73.3％存在于原料污泥中存在的铬化滤液。通过Zeta电位和扫描电子显微镜进行的研究揭示了两步机构的作用，即氧化，然后在提高污泥脱水性方面进行凝结。进一步的研究可以进行利用干燥处理的污泥作为生物质燃料的可能性。

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  • 来源
    《Journal of Hazardous Materials》 |2021年第1期|123495.1-123495.10|共10页
  • 作者

    Jessieleena A. Angel; Priyanka M.; Saravanakumar M. P.;

  • 作者单位

    Vellore Inst Technol Sch Civil Engn Dept Environm & Water Resources Engn Vellore 632014 Tamil Nadu India;

    Vellore Inst Technol Sch Civil Engn Dept Environm & Water Resources Engn Vellore 632014 Tamil Nadu India;

    Vellore Inst Technol Sch Civil Engn Dept Environm & Water Resources Engn Vellore 632014 Tamil Nadu India;

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

    Tannery sludge; Oxidation; Dewaterability; Chromium; Capillary suction time;

    机译：Tannery污泥;氧化;脱水性;铬;毛细管吸入时间;

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