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Combined coagulation–flocculation and sequencing batch reactor with phosphorus adjustment for the treatment of high-strength landfill leachate: Experimental kinetics and chemical oxygen demand fractionation
The treatability of high-strength landfill leachate is challenging and relatively limited. This study examines the feasibility of treating high-strength landfill leachate (chemical oxygen demand [COD]: 7,760–11,770 mg/L, biochemical oxygen demand [BOD5]: 2,760–3,569 mg/L, total nitrogen [TN] = 980–1,160 mg/L) using a sequencing batch reactor (SBR) preceded by a coagulation–flocculation process with phosphorus nutritional balance under various mixing and aeration patterns. Simulations were also conducted to define kinetic parameters and COD fractionation. Removal efficiencies reached 89% for BOD5, 60% for COD, and 72% for TN, similar to and better than reported studies, albeit with a relatively lower hydraulic retention time (HRT) and solid retention time (SRT). The coupled experimental and simulation results contribute in filling a gap toward managing high-strength landfill leachate and providing guidelines for corresponding SBR applications.
The treatability of high-strength landfill leachate, which is challenging and relatively limited, was demonstrated using a combined coagulation–flocculation with SBR technology and nutrient balance adjustment. The most suitable coagulant, kinetic design parameters, and COD fractionation were defined using coupled experimental and simulation results contributing in filling a gap toward managing high-strength leachate by providing guidelines for corresponding SBR applications and anticipating potential constraints related to the non-biodegradable COD fraction. In this context, while the combined coagulation–flocculation and SBR process improved removal efficiencies, posttreatment may be required for high-strength leachate, depending on discharge standards and ultimate usage of the treated leachate.
Combined coagulation–flocculation and sequencing batch reactor with phosphorus adjustment for the treatment of high-strength landfill leachate: Experimental kinetics and chemical oxygen demand fractionation
The treatability of high-strength landfill leachate is challenging and relatively limited. This study examines the feasibility of treating high-strength landfill leachate (chemical oxygen demand [COD]: 7,760–11,770 mg/L, biochemical oxygen demand [BOD5]: 2,760–3,569 mg/L, total nitrogen [TN] = 980–1,160 mg/L) using a sequencing batch reactor (SBR) preceded by a coagulation–flocculation process with phosphorus nutritional balance under various mixing and aeration patterns. Simulations were also conducted to define kinetic parameters and COD fractionation. Removal efficiencies reached 89% for BOD5, 60% for COD, and 72% for TN, similar to and better than reported studies, albeit with a relatively lower hydraulic retention time (HRT) and solid retention time (SRT). The coupled experimental and simulation results contribute in filling a gap toward managing high-strength landfill leachate and providing guidelines for corresponding SBR applications.
The treatability of high-strength landfill leachate, which is challenging and relatively limited, was demonstrated using a combined coagulation–flocculation with SBR technology and nutrient balance adjustment. The most suitable coagulant, kinetic design parameters, and COD fractionation were defined using coupled experimental and simulation results contributing in filling a gap toward managing high-strength leachate by providing guidelines for corresponding SBR applications and anticipating potential constraints related to the non-biodegradable COD fraction. In this context, while the combined coagulation–flocculation and SBR process improved removal efficiencies, posttreatment may be required for high-strength leachate, depending on discharge standards and ultimate usage of the treated leachate.
Combined coagulation–flocculation and sequencing batch reactor with phosphorus adjustment for the treatment of high-strength landfill leachate: Experimental kinetics and chemical oxygen demand fractionation
El-Fadel, M. (author) / Matar, F. (author) / Hashisho, J. (author)
Journal of the Air & Waste Management Association ; 63 ; 591-604
2013-05-01
14 pages
Article (Journal)
Electronic Resource
English
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