Mathematical modeling of COD removal via the combined treatment of domestic wastewater and landfill leachate based on the PACT process.
The experiments performed in this study consisted of 16 batch reactors fed different mixtures of landfill leachate combined with synthetic wastewater treated using the Powdered Activated Carbon Treatment (PACT) process. The objective was to measure the COD mass removal per liter each day for each reactor using two models: the first model combined the variables PAC concentration (0 g·L(-1), 2 g·L(-1), 4 g·L(-1), and 6 g·L(-1)) and leachate rate in the wastewater (0%, 2%, 5%, and 10%), and the second model combined the PAC concentration and the influent COD. The Response Surface Methodology with Central Composite Design was used to describe the response surface of both models considered in this study. Domestic wastewater was produced under controlled conditions in the laboratory where the experiments were performed. The results indicated that the PAC effect was null when the influent did not contain leachate; however, as the concentration of leachate applied to the mixture was increased, the addition of a higher PAC concentration resulted in a better COD mass removal in the reactors. The adjusted R(2) values of the two models were greater than 0.95, and the predicted R(2) values were greater than 0.93. The models may be useful for wastewater treatment companies to calculate PAC requirements in order to meet COD mass removal objectives in combined treatment.
['Fernández Bou|Ángel S|ÁS|', 'Nascentes|Alexandre Lioi|AL|', 'Costa Pereira|Barbara|B|', 'Da Silva|Leonardo Duarte Batista|LD|', 'Alberto Ferreira|João|J|', 'Campos|Juacyara Carbonelli|JC|']
D057919:Biological Oxygen Demand Analysis D001938:Brazil D002606:Charcoal D052918:Environmental Restoration and Remediation D008956:Models, Chemical D014865:Waste Disposal, Fluid D062065:Waste Water D014874:Water Pollutants, Chemical
powdered activated carbon treatment COD mass removal with PACT treatment Combined treatment of landfill leachate and sewage mathematical model of COD removal from leachate