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Introduction to Sludge Treatment

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Physicochemical Treatment Processes

Part of the book series: Handbook of Environmental Engineering ((HEE,volume 3))

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Abstract

Sludge accumulates as a residue in all sorts of wastewater treatment. Sludge comprises the solids and colloids separated from wastewater as well as substances from biological and chemical operation units. Some sludges are produced during wastewater treatment, including primary sludge, which comprises settleable solids removed from the primary clarifier, and secondary sludge, which comprises biological solids generated in the secondary wastewater treatment plant. Figure 1 illustrates a waste activated sludge sample collected from a local sewage treatment works. Furthermore, drinking water producers produce coagulated solids-coagulant matrix, which contains all of the impurities in the raw water and the dosed coagulant. Additionally, numerous kinds of industrial sludges exist which are generated from treating different industrial wastewaters. The shared features of these sludges are high moisture content that is difficult to remove mechanically, relatively weak flocs that are easily torn off during shear, and concentrated pollutants that require further stabilization for safe disposal.

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References

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Author information

Authors and Affiliations

  1. Department of Chemical Engineering, National Taiwan University, Taipei, Taiwan

    Duu-Jong Lee PhD

  2. Division of Environmental and Water Resource Engineering, Nanyang Technological University, Singapore

    Joo-Hwa Tay PhD, PE

  3. Department of Civil and Environmental Engineering, Cleveland State University, Cleveland, OH

    Yung-Tse Hung PhD, PE, DEE

  4. School of Environmental Science and Engineering, Tongji University, Shanghai, China

    Pin Jing He PhD

Authors
  1. Duu-Jong Lee PhD
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  2. Joo-Hwa Tay PhD, PE
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  3. Yung-Tse Hung PhD, PE, DEE
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  4. Pin Jing He PhD
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Editor information

Editors and Affiliations

  1. Zorex Corporation, Newtonville, NY

    Lawrence K. Wang PhD, PE, DEE

  2. Lenox Institute of Water Technology, Lenox, MA

    Lawrence K. Wang PhD, PE, DEE  & Nazih K. Shammas PhD  & 

  3. Krofta Engineering Corporation, Lenox, MA

    Lawrence K. Wang PhD, PE, DEE

  4. Department of Civil and Environmental Engineering, Cleveland State University, Cleveland, OH

    Yung-Tse Hung PhD, PE, DEE

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© 2005 Humana Press Inc., Totowa, NJ

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Lee, DJ., Tay, JH., Hung, YT., He, P.J. (2005). Introduction to Sludge Treatment. In: Wang, L.K., Hung, YT., Shammas, N.K. (eds) Physicochemical Treatment Processes. Handbook of Environmental Engineering, vol 3. Humana Press. https://doi.org/10.1385/1-59259-820-x:677

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