Effect of sludge pH and treatment time on the electrokinetic removal of aluminum from water potabilization treatment sludge

Mouna Cherifi, Nabila Boutemine, Debra F. Laefer, Sabir Hazourli

Research output: Contribution to journalArticlepeer-review

Abstract

Algerian's municipal sewage treatment plants generate around 106 m3 of sewage sludge annually. Recently, rapid expansion of wastewater treatment plants without equal attention to the treatment of the produced sludge has generated increasing concerns. While the sludge is usually incinerated or used as an agricultural fertilizer and may contain numerous nutrients, there may also be harmful substances that complicate sludge management. Hence the removal of pollutants from the sludge is necessary before further usage. This paper discusses the characteristics of potable water treatment sludge containing a high aluminum content. Furthermore, an electrokinetic treatment is proposed to remove aluminum from this sludge by varying the type of solution contained in the cathode compartment and modifying the treatment time to optimize the efficiency of the process. Successful results were achieved where 60% of aluminum was collected on the cathode side with a consumed energy around of 1000-2000 kWh kg-1 of sludge weight.

Original languageEnglish (US)
Pages (from-to)511-516
Number of pages6
JournalComptes Rendus Chimie
Volume19
Issue number4
DOIs
StatePublished - Apr 1 2016

Keywords

  • Aluminum
  • Electrokinetic technique
  • Electrolyte solution
  • Sludge
  • Treatment time

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

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