Optimization of stabilized leachate treatment using ozone/persulfate in the advanced oxidation process

► Ozone and persulfate reagent (O3/S2O82-) was used to treat stabilized leachate. ► Central composite design (CCD) with response surface methodology (RSM) was applied. ► Operating variables including ozone and persulfate dosage, pH variance, and reaction time. ► Optimum removal of COD, color, and NH...

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Bibliographic Details
Published in:Waste management (Elmsford) 2013-06, Vol.33 (6), p.1434-1441
Main Authors: Abu Amr, Salem S., Aziz, Hamidi Abdul, Adlan, Mohd Nordin
Format: Article
Language:English
Subjects:
Advanced oxidation
AMMONIA
Ammonia - chemistry
Analysis of Variance
Applied sciences
Biological Oxygen Demand Analysis
COLOR
COMPARATIVE EVALUATIONS
Consumption
Exact sciences and technology
General treatment and storage processes
Hydrogen-Ion Concentration
INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY
LEACHATES
MANAGEMENT OF RADIOACTIVE WASTES, AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
Mathematical models
Models, Theoretical
Nitrogen - chemistry
OPTIMIZATION
OXIDATION
Oxidation-Reduction
OZONE
Persulfate
PH VALUE
Pollution
Reaction time
REAGENTS
SANITARY LANDFILLS
STABILIZATION
Stabilized leachate
Sulfates - chemistry
Wastes
Water Pollutants, Chemical - chemistry
Water Purification - methods
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Summary:► Ozone and persulfate reagent (O3/S2O82-) was used to treat stabilized leachate. ► Central composite design (CCD) with response surface methodology (RSM) was applied. ► Operating variables including ozone and persulfate dosage, pH variance, and reaction time. ► Optimum removal of COD, color, and NH3–N was 72%, 96%, and 76%, respectively. ► A good value of ozone consumption (OC) obtained with 0.60 (kg O3/kg COD). The objective of this study was to investigate the performance of employing persulfate reagent in the advanced oxidation of ozone to treat stabilized landfill leachate in an ozone reactor. A central composite design (CCD) with response surface methodology (RSM) was applied to evaluate the relationships between operating variables, such as ozone and persulfate dosages, pH, and reaction time, to identify the optimum operating conditions. Quadratic models for the following four responses proved to be significant with very low probabilities (
ISSN:0956-053X
1879-2456
DOI:10.1016/j.wasman.2013.01.039