PHOTOCHEMICAL TREATMENT OF SLAUGHTERHOUSE WASTEWATER BY UV/H2O2 WITH EFFLUENT RECYCLE A STATISTICAL EXPERIMENTAL DESIGN APPROACH
Published In: 3RD INTERNATIONAL CONFERENCE ON ADVANCES IN CIVIL, STRUCTURAL AND ENVIRONMENTAL ENGINEERING
Author(s): C. F. BUSTILLO-LECOMPTE , M. MEHRVAR , S. GHAFOORI
Abstract: The UV/H2O2 process is optimized for slaughterhouse wastewater (SWW) treatment using a continuousflow photoreactor with effluent recycle. A four factors at five levels central composite design (CCD) with response surface methodology (RSM) is used to maximize total organic carbon (TOC) removal and minimize H2O2 residual. The effects of the influent TOC concentration, H2O2 dosage, feed flow rate, and effluent recycle on the photolytic treatment of SWW are also investigated. Statistical modeling is used to predict the percent TOC removal and H2O2 residual as the response variables. Results show that recycle ratio is significant in minimizing the H2O2 residual and its cross-factor interactions with other variables demonstrate a significant effect on percent TOC removal. The statistical models are validated at the optimum operating conditions based on the results of the design of experiments (DOE). The model predictions are found to be in agreement with observed values, indicating that the
- Publication Date: 11-Oct-2015
- DOI: 10.15224/978-1-63248-065-1-118
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INFLUENCE OF UPFLOW VELOCITY ON PERFORMANCE AND BIOFILM CHARACTERISTICS OF ANAEROBIC FLUIDIZED BED REACTOR (AFBR) IN TREATING HIGH-STRENGTH WASTEWATER
Published In: 3RD INTERNATIONAL CONFERENCE ON ADVANCES IN CIVIL, STRUCTURAL AND ENVIRONMENTAL ENGINEERING
Author(s): ALIREZA MESDAGHINIA , AMIR HOSSEIN MAHVI , JALIL JAAFARI , MOHAMMAD HOSEINI HOSSEIN KAMANI , RAMIN NABIZADEH
Abstract: One of the key parameters in Fluidized Bed reactors is the control of biofilm thickness and configuration. The effect of upflow velocity on performance and biofilm characteristics of an Anaerobic Fluidized Bed Reactor was studied in treating Currant wastewater at various loading rates. The reactor used this study was made of a plexiglass column being 60 mm diameter, 140 cm height, and a volume of 3.95 L. The results demonstrated that the AFBR system is capable of handling an exceptionally high organic loading rate. At organic loading rates of 9.4 to 24.2 (kg COD m−3) at steady state, reactor performances with upflow velocities of 0.5, 0.75 and 1 (m min−1) were 89.3- 63.4, 96.9 – 79.6 and 95 – 73.4 percent, respectively. The average biomass concentration per unit volume of the AFBR (as gVSSatt L−1 expended bed) decreased with the increase of upflow velocity in the range of 0.5–1 m min−1 at all applied organic loading rates. The total biomass in the reactor increased with increases in th
- Publication Date: 11-Oct-2015
- DOI: 10.15224/978-1-63248-065-1-122
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