Development of New Disinfection Indicator in Chlorine Contact Tanks

2016 ◽  
Vol 33 (6) ◽  
pp. 374-383 ◽  
Author(s):  
Seungjae Lee ◽  
No-Suk Park ◽  
Heekyung Park
Keyword(s):  
Contact Tanks

Experimental and Numerical Evaluation of a Porous Baffle Design for Contact Tanks

2020 ◽  
Vol 146 (7) ◽  
pp. 04020063
Author(s):  
M. Anil Kizilaslan ◽  
Nazhmiddin Nasyrlayev ◽  
A. Tolga Kurumus ◽  
Hasan Savas ◽  
Ender Demirel ◽  
...  
Keyword(s):  
Numerical Evaluation ◽  
Contact Tanks

Modal Contact Time Tracer Studies in Two Chlorine Contact Tanks

2010 ◽  
Vol 2010 (16) ◽  
pp. 1268-1278
Author(s):  
Benjamin Porter ◽  
Juan Josse ◽  
Carl Spangenberg ◽  
Keith Hafner
Keyword(s):  
Contact Time ◽  
Tracer Studies ◽  
Contact Tanks

The Design of Disinfection Contact Tanks

1995 ◽  
Vol 9 (2) ◽  
pp. 146-152 ◽  
Author(s):  
D. g. stevenson
Keyword(s):  
Contact Tanks

Flow, transport and disinfection performance in small- and full-scale contact tanks

2015 ◽  
Vol 9 (1) ◽  
pp. 15-27 ◽  
Author(s):  
Athanasios Angeloudis ◽  
Thorsten Stoesser ◽  
Roger A. Falconer ◽  
Dongjin Kim
Keyword(s):  
Full Scale ◽  
Flow Transport ◽  
Contact Tanks

Non-Deterministic CFD Modelling of Peracetic Acid Disinfection in Contact Tanks

2013 ◽  
Vol 2013 (2) ◽  
pp. 401-404
Author(s):  
Domenico Santoro ◽  
Giuseppe Raspa ◽  
Ferdinando Crapulli ◽  
Mehrdad Raisee ◽  
Charles N. Haas
Keyword(s):  
Peracetic Acid ◽  
Cfd Modelling ◽  
Contact Tanks

scholarly journals Effect of Porous Baffles on the Energy Performance of Contact Tanks in Water Treatment

Water ◽  
2018 ◽  
Vol 10 (8) ◽  
pp. 1084 ◽  
Author(s):  
M. A. Kizilaslan ◽  
E. Demirel ◽  
M. M. Aral
Keyword(s):  
Energy Efficiency ◽  
Water Treatment ◽  
Porous Layer ◽  
Hydraulic Efficiency ◽  
Tracer Transport ◽  
Dispersion Effects ◽  
Conventional Design ◽  
Flow Through ◽  
Contact Tanks ◽  
Porous Zone

Three-dimensional numerical simulations are performed to evaluate the effect of porous baffles on the efficiency of water treatment contact tanks. A second-order accurate numerical model is employed for the solutions of unsteady flow and tracer transport through the porous baffles. The flow through the porous medium is characterized while using the Darcy-Forchheimer relationship. Large Eddy Simulation (LES) model is used to simulate the instantaneous mixing of the tracer in the chambers of the contact tank. Three different porosities are considered to evaluate the effect of porosity on the hydraulic and mixing efficiencies of the contact tank. Simulated time-averaged flow field shows that porous baffles that are placed at the entrance of each chamber could successfully mitigate short-circuiting and yield plug-flow conditions through the system for low porosities. Flow in the contact tank becomes laminar as the flow velocities decrease due to viscous effects and inertial resistance in the porous zone. For this case, the tracer is transported with bulk flow through the system and leaves the contact tank with a high peak seen in the Residence Time Distribution (RTD) plot. Porous layer increases the hydraulic efficiency of the conventional design from “poor” to “good” according to the baffling factor and increases the overall efficiency from “compromising” to “good” according to the AD index. Comparison of the performance of the porous layer with the previously developed slot-baffle design shows that the slot-baffle design increases the efficiency of the tank with increasing dispersion effects, whereas the porous design increases hydraulic efficiency and reduces the dispersion effects. While the porous design reduces energy efficiency by 33% due to a drastic increase in drag in the flow through porous zone, the slot-baffle design increases the energy efficiency of the conventional design by 67%.

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