2019 CSCE Annual Conference - Laval (Greater Montreal) Conference
Dr. Maria Elektorowicz, Concordia University
Dr. Sharif Ibeid, Concordia University
Optimization of reaction parameters by applying central composite design (CCD) to the advanced oxidation treatment of WWTP effluents by UV/H2O2
Sasan Fazeli*, Maria Elektorowicz, Sharif Ibeid
Department of Building, Civil and Environmental Engineering (BCEE), Faculty of Engineering & Computer Sciences, Concordia University, Montreal, Quebec, Canada?
Abstract (background, results, conclusion, keywords)
Background: In this research the removal of effluent organic matter (EfOM) by advanced oxidation processes (UV/ H2O2) was evaluated. The target EfOM samples were the output of electro-membrane bioreactor (EMBR) pilot facilities located in Wastewater Treatment Plant in the City of l’Assomption (Quebec). To optimize the treatment conditions, a response surface methodology (RSM) was applied. By using RSM and central composite design (CCD), the effect of operational parameters including H2O2 concentration (0.0 - 24 mM), aeration rate (0.0 - 5 L/min) and pH (3-11) on treatment performance was investigated.
Results : The regression analysis of variance (ANOVA) with R2 value of 0.98 confirmed the reliability of predicted quadratic polynomial model which had a goof fitness to the experimental values. Experimental results revealed the significant influence of aeration, H2O2 concentration and pH on removal rate of EfOM. However, the pH values and aeration rate should not increase more than specific values and H2O2 consumption could be decreased by optimization of two other operational parameters, i.e. pH and aeration. Furthermore, by applying optimum condition, the results showed significant removal of total organic carbon (TOC) more than 90% in several samples.
Conclusions: This study showed a significant influence of operating parameters on TOC (EfOM) removal in effluent by using UV/ H2O2 advanced oxidation system. The application of central composite design based on response surface methodology has an important role to find optimum conditions. Decrease of organic matter in effluent is an important step to produce drinking water directly from sewage.
Keywords: Effluent tertiary treatment, Central composite design, Response surface methodology, Effluent organic matter, UV/H2O2 .