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- Title
Coagulation–flocculation process for landfill leachate pretreatment and optimization with response surface methodology.
- Authors
Smaoui, Yosr; Chaabouni, Moncef; Sayadi, Sami; Bouzid, Jalel
- Abstract
The present paper aimed to characterize and treat a landfill leachate using a coagulation–flocculation process. The leachate was obtained from a landfill in the city of Sousse, Tunisia. Its physicochemical characterization showed high levels of chemical oxygen demand (COD), ammonium, and heavy metal contents. The coagulation–flocculation process was applied as pretreatment effluent to reduce these pollutants. The key operating parameters (pH, coagulant dose, flocculant dose, and mixing speed in the flocculation step) on the coagulation–flocculation process were optimized using response surface methodology to investigate COD removal in landfill leachate. In this regard, a hybrid design was carried out to seek optimal conditions which were as follows: pH: 3.36; concentration of coagulant: 0.87 g/l; concentration of flocculant: 26 mg/l; and mixing speed: 48 rpm. These conditions have been proved experimentally.
- Subjects
LEACHATE; FLOCCULATION in sewage purification; RESPONSE surfaces (Statistics); LANDFILL management; CHEMICAL oxygen demand; HEAVY metals removal (Sewage purification)
- Publication
Desalination & Water Treatment, 2016, Vol 57, Issue 31, p14488
- ISSN
1944-3994
- Publication type
Article
- DOI
10.1080/19443994.2015.1067837