Effect of sludge pH and treatment time on the electrokinetic removal of aluminum from water potabilization treatment sludge
|Effets du pH de la boue et du temps de traitement sur l'élimination électrocinétique de l'aluminium d'une boue de traitement d'eaux potables
Laefer, Debra F.
|Sludge;Aluminum;Treatment time;Electrolyte solution;Electrokinetic technique;Boue;Temps de traitement;Solution électrolytique;Technique électrocinétique
|Cherifi, M., Hazourli, S., and Laefer, D. (2016). Effect of Sludge pH and Treatment Time on the Electrokinetic Removal of Aluminum from Water Potabilization Treatment Sludge, Compte Rendue Chimie. 19(4): 511-516.
|Algerian's municipal sewage treatment plants generate around 106 m3 of sewage sludge annually. Recently, rapid expansion of waste water 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.
|Copyright © 2016 Académie des sciences. Published by Elsevier Masson SAS All rights reserved.
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