Sludge treatment analysis in Potable Water Treatment Plant (PWTP) in Logroño (Spain)

  1. García Alvárez, R. 3
  2. Ekpeni, L.E.N. 1
  3. Bobadilla, M.C. 2
  4. González, E.P.V. 2
  5. Lorza, R.L. 2
  1. 1 Dublin City University
    info

    Dublin City University

    Dublín, Irlanda

    ROR https://ror.org/04a1a1e81

  2. 2 Universidad de La Rioja
    info

    Universidad de La Rioja

    Logroño, España

    ROR https://ror.org/0553yr311

  3. 3 Project and Construction Section, City Council of Logroño, Spain
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Libro:
Chemical Engineering Transactions

ISBN: 9788895608334

Año de publicación: 2014

Volumen: 42

Páginas: 145-150

Tipo: Capítulo de Libro

DOI: 10.3303/CET1442025 SCOPUS: 2-s2.0-84946546316 WoS: WOS:000365992900025 GOOGLE SCHOLAR

Resumen

In a Drinking Water Plant the first step in purifying water is the removal of the suspended solids and other organic or inorganic compounds (silts, clays and very fine particles). The separation is based on settling processes that is carried out through coagulation and sand filtration and the resultant product in the process is sent to sludge line. In this line, the sludge is flocculated, decanted and then thickened. As the water obtained is recirculated to first-stage treatment, the concentrated sludge is dehydrated for later use. The sludge contains a large amount of flocculants and as a result, the sludge recirculation would be possible so as to reduce the dosages of the chemical polymer streamlining the process of dehydration. This study shows the inefficiency of the sludge recirculation, and therefore proposes sludge removal process for future designs and sludge lines projects. Copyright © 2014, AIDIC Servizi S.r.l.