Disinfection by Peracetic Acid: Influence of Inorganic and Organic Compounds
The disinfection effectiveness of peracetic acid (PAA) for wastewater applications has been extensively documented; however, PAA decays rapidly in water solution, depending on the water matrix characteristics. Guarantying a proper disinfectant dose is fundamental for the design of a
disinfection process, therefore modeling PAA decay as a function of wastewater characteristics is crucial. The aim of this study was to assess PAA consumption in multicomponent solutions reflecting realistic situations of a final effluent of a wastewater treatment plant (WWTP) under controlled
conditions. Two experimental plans, one for inorganics and another one for organics, were defined using the statistical method of Design of Experiments (DoE), which allowed evaluating the effect of each compound or their interaction on PAA decay. Experiments were performed at laboratory-scale
for PAA concentrations between 2-10 mgPAA/L and linear least-square regressions were used to interpolate two models based on the compounds that displayed an effect on PAA decay.
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Keywords: decay kinetics; design of experiments; initial PAA demand; inorganic; organics; peracetic acid; reaction rate constant
Document Type: Research Article
Affiliations: Politecnico di Milano, Department of Civil and Environmental Engineering (DICA) - Environmental Section, Piazza Leonardo da Vinci 32, 20133 Milano, Italy
Publication date: 01 January 2017
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