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Effect of potassium ferrate on disintegration of waste activated sludge (WAS)

机译：高铁酸钾对废活性污泥（WAS）分解的影响

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摘要

The activated sludge process of wastewater treatment results in the generation of a considerable amount of excess activated sludge. Increased attention has been given to minimization of waste activated sludge recently. This paper investigated the effect of potassium ferrate oxidation pretreatment on the disintegration of the waste activated sludge at various dosages of potassium ferrate. The results show that potassium ferrate pretreatment disintegrated the sludge particle, resulting in the reduction of total solid content by 31%. The solubility (SCOD/TCOD) of the sludge increased with the increase of potassium ferrate dosage. Under 0.81 g/g SS dosage of potassium ferrate, SCOD/TCOD reached 0.32. Total nitrogen (TN) and total phosphorous (TP) concentrations in the solution all increased significantly after potassium ferrate pretreatment. The sludge particles reduced from 116 to 87 μm The settleability of the sludge (SV1) was enhanced by 17%, which was due to the re-flocculation by the by-product, Fe(Ⅲ), during potassium ferrate oxidation and the decrease of the viscosity. From the result of the present investigations, it can be concluded that potassium ferrate oxidation is a feasible method for disintegration of excess activated sludge.
机译：废水处理的活性污泥过程导致大量过量的活性污泥产生。最近，人们对减少废物活性污泥的关注日益增加。本文研究了高铁酸钾氧化预处理对不同剂量高铁酸钾对废活性污泥分解的影响。结果表明，高铁酸钾预处理会分解污泥颗粒，从而使总固体含量降低31％。污泥的溶解度（SCOD / TCOD）随着高铁酸钾剂量的增加而增加。在SS剂量为0.81 g / g的高铁酸钾下，SCOD / TCOD达到0.32。高铁酸钾预处理后溶液中的总氮（TN）和总磷（TP）浓度均显着增加。污泥颗粒从116减少到87μm。污泥（SV1）的沉降能力提高了17％，这是由于高铁酸钾氧化过程中副产物Fe（Ⅲ）的再絮凝和污泥的减少所致。粘度。从目前的研究结果可以得出结论，高铁酸钾氧化是一种分解多余活性污泥的可行方法。

著录项

  • 来源
    《Journal of Hazardous Materials》 |2012年第15期|p.164-168|共5页
  • 作者

    Fenxia Ye; Haizhuang ji; Yangfang Ye;

  • 作者单位

    Department of Chemical Engineering, Ningbo University of Technology, Ningbo 3/5016, China;

    Department of Chemical Engineering, Ningbo University of Technology, Ningbo 3/5016, China;

    Faculty of Life Science and Biotechnology, Ningbo University, Ningbo 315036, China;

  • 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

    waste activated sludge (WAS); potassium ferrate; pretreatment; disintegration; settleability;

    机译：废物活性污泥（WAS）;高铁酸钾预处理解体;沉降性;

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