Dynamic Mathematical Modeling of Static Granular Bed Reactor-Granular Activated Carbon (RSGBR-GAC) with Recirculation Flow for Domestic Wastewater Treatment
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Abstract
The objective of this study was to develop the dynamic modeling of Recirculation Plug-Flow Reactor (RPFR), and Recirculation Completely-mixed Stirred Tank Reactor (RCSTR) of a wastewater treatment system that uses Recirculation Static Granular Activated Carbon Bed Reactor (RSGBR-GAC). The flow direction is perpendicular to the horizontal-cylindrical reactor. The width of the filter layer is about 0.10 m., the depth of the filter layer is approximately 0.09 m., and length of the pipe is 1.80 m. It contains 12.6 kg of granular activated carbon. Accordingly, the study of the width : depth ratio (<1 : 4) found that the optimum recirculation ratio (QR/Qin = R) equal to 936 with the Volume (V) equals 0.014 m3. The Hydraulic Recirculation Time (HReT) at 1 h yielded the highest efficiency to remove BOD and NH3. The BOD and NH3 removal efficiency reached 87.40 ± 2.42% and 62.76 ± 2.69% in domestic wastewater. The accuracy and precision model revealed that the second-order reaction occurred in Recirculation Completely-mixed Stirred Tank Reactor (RCSTR) with Volumetric rate coefficients to kBOD2ndRCSTR and kNH32ndRCSTR were 2.044 1/day and 7.63 1/day.
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