Prediction of advanced oxidation performance in various pilot UV/H2O2 reactor systems with MP- and LP- and DBD-UV lamps

2012 ◽  
Vol 210 ◽  
pp. 520-528 ◽  
Author(s):  
Roberta C.H.M. Hofman-Caris ◽  
Danny J.H. Harmsen ◽  
Erwin F. Beerendonk ◽  
Ton H. Knol ◽  
Corine J. Houtman ◽  
...  
Keyword(s):  
Advanced Oxidation ◽  
Oxidation Performance ◽  
Uv Lamps

Prediction of advanced oxidation performance in UV/H2O2 reactor systems with LP-UV lamps

2011 ◽  
Vol 11 (4) ◽  
pp. 460-467 ◽  
Author(s):  
C. H. M. Hofman-Caris ◽  
D. J. H. Harmsen ◽  
B. A. Wols ◽  
L. J. J. M. Janssen ◽  
E. F. Beerendonk ◽  
...  
Keyword(s):  
Drinking Water ◽  
Drinking Water Treatment ◽  
Advanced Oxidation ◽  
Design Tool ◽  
Operating Conditions ◽  
Reactor Performance ◽  
Water Characteristics ◽  
Oxidation Performance ◽  
H2o2 Oxidation ◽  
Uv Lamps

Advanced oxidation processes, like UV/H2O2 oxidation, are important barriers against organic micro pollutants in drinking water treatment. In order to guarantee safe drinking water, it is important to be able to predict the reactors' performance to adjust the operating conditions to the actual influent water characteristics (like UV transmission) and lamp performance. Therefore, a design tool was developed, which is based on a kinetic model that describes and predicts the direct photolysis and oxidation of organic compounds in pilot experiments, using Low Pressure (LP) UV-lamps. This model has been combined with computational fluid dynamics (CFD), in order to be able to accurately predict the results of pilot and full scale installations, and also to design reactor systems. The model was applied to three model compounds (atrazine, ibuprofen and NDMA) in two different pilot reactors, and it has been shown that reactor performance can be fairly predicted by applying this ‘UVPerox’ model. The model takes into account the water quality and power of the lamps, and the properties of the compounds involved.

Prediction of Advanced Oxidation Performance in Pilot UV/H2O2Reactor Systems with MP- and LP-UV Lamps

2012 ◽  
Vol 34 (2) ◽  
pp. 120-124 ◽  
Author(s):  
C.H.M. (Roberta) Hofman-Caris ◽  
D.J.H. Harmsen ◽  
E.F. Beerendonk ◽  
A.H. Knol ◽  
D.H. Metz ◽  
...  
Keyword(s):  
Advanced Oxidation ◽  
Oxidation Performance ◽  
Uv Lamps

AOPs with ozone and UV radiation in drinking water: contaminants removal and effects on disinfection byproducts formation

2004 ◽  
Vol 49 (4) ◽  
pp. 51-56 ◽  
Author(s):  
C. Collivignarelli ◽  
S. Sorlini
Keyword(s):  
Uv Radiation ◽  
Contact Time ◽  
Advanced Oxidation ◽  
Complete Removal ◽  
Disinfection Byproducts ◽  
Uv Absorbance ◽  
Water Contaminants ◽  
Batch Tests ◽  
Uv Dose ◽  
Uv Lamps

In this study, the advanced oxidation with ozone and UV radiation (with two low pressure UV lamps, at 254 and 185 nm wavelength) were experimented on a surface water in order to study the removal of two odorous compounds (geosmin and 2-methylisoborneol) and a pesticide (metolachlor), the influence on organic compounds (UV absorbance and THM precursors) and bromate formation. Different batch tests were performed with ozone concentration up to 10 mg/L, UV dose up to 14,000 J/m2 and a maximum contact time of 10 minutes. The main results show that metolachlor can be efficiently removed with ozone alone while for geosmin and MIB a complete removal can be obtained with the advanced oxidation of ozone (with concentration of 1.5-3 mg/L and contact time of 2Ð3 minutes) with UV radiation (with doses of 5,0000-6,000 J/m2). As concerns the influence on the organic precursors, all the experimented processes show a medium removal of about 20-40% for UV absorbance and 15-30% for THMFP (trihalomethanes formation potential). As concerns bromate formation, the advanced oxidation of ozone/UV 254 nm shows a bromate formation that is about 40% lower with respect to conventional oxidation with ozone.

scholarly journals Alternative use of Pseudomonas aeruginosa as indicator for greywater disinfection

2018 ◽  
Vol 78 (6) ◽  
pp. 1361-1369 ◽  
Author(s):  
Anderson Teodoro ◽  
Amilcar Machulek Júnior ◽  
Marc Árpád Boncz ◽  
Paula Loureiro Paulo
Keyword(s):  
Hydrogen Peroxide ◽  
Pseudomonas Aeruginosa ◽  
Solar Radiation ◽  
Acute Toxicity ◽  
High Resistance ◽  
Surfactant Concentration ◽  
Advanced Oxidation ◽  
Natural Concentration ◽  
Log Linear ◽  
Uv Lamps

Abstract Greywater presents great potential for reuse; if treated correctly and efficiently, it can be used for several residential uses. The objective of this work was to test advanced oxidation for greywater disinfection through UV/TiO2, UV/TiO2/H2O2, photo-Fenton, UV/H2O2 and photolysis (UV) processes, using Pseudomonas aeruginosa as an alternative indicator. In general, the processes with hydrogen peroxide (150 mg.L−1) mixed in the pretreated greywater and exposed to solar radiation or artificial radiation from UV lamps were the most efficient in the disinfection experiments, with total inactivation of P. aeruginosa. These processes (UV/H2O2 and photo-Fenton) were better fitted to the log-linear/caudal decay model with remaining microorganism for the hydrogen peroxide concentration of 25 mg.L−1. The use of P. aeruginosa as an alternative indicator for the greywater disinfection was very promising due to its high resistance and high natural concentration in the effluent used in the experiments. The treatment applied with the UV/H2O2 process with the hydrogen peroxide concentration at 150 mg.L−1 was the only one that showed acute toxicity, even though it removed a good part of the surfactant concentration from the pre-treated greywater.

Effects of PbO2/Pb3O4 Ratio Alteration for Enhanced Electrochemical Advanced Oxidation Performance

2021 ◽  
pp. 122277
Author(s):  
Hao Yang ◽  
Yan Zhou ◽  
Kuo Chen ◽  
Xinping Yu ◽  
Fengchao Sun ◽  
...  
Keyword(s):  
Advanced Oxidation ◽  
Oxidation Performance

Dependency of Advanced Oxidation Performance on the Contaminated Water Feed Mode for Ozonation Combined with Electrolysis Using a Two-compartment Electrolytic Flow Cell

2007 ◽  
Vol 10 (2) ◽  
Author(s):  
Naoyuki Kishimoto
Keyword(s):  
Current Density ◽  
Removal Rate ◽  
Advanced Oxidation ◽  
Contaminated Water ◽  
Oxidation Performance ◽  
Feed Mode ◽  
Water Feed ◽  
The Difference ◽  
Cod Removal Rate ◽  
Cathodic Compartment

AbstractThe effect of the contaminated water feed mode on advanced oxidation performance, for a combined system, using ozonation with electrolysis (ozone-electrolysis) in a two-compartment electrolytic flow cell, was discussed for ozone injection to the cathodic compartment of the cell. When ozone-electrolysis was applied, removal of the chemical oxygen demand (COD) proceeded in the cathodic compartment. The overall COD removal rate increased with the increase in current density for direct feed of contaminated water to the anodic compartment (DFA mode). However, the overall COD removal rate decreased at high current density for direct feed to the cathodic compartment (DFC mode), although the overall performance for the DFC mode was better than the DFA mode. The difference in the dependency of the performance on current density was determined to be due to the difference in the advanced oxidation mechanisms for each mode.

Pilot Plant Results with Three Different Types of UV Lamps for Advanced Oxidation

2013 ◽  
Vol 35 (1) ◽  
pp. 38-48 ◽  
Author(s):  
K. Lekkerkerker-Teunissen ◽  
A.H. Knol ◽  
J.G. Derks ◽  
M.B. Heringa ◽  
C.J. Houtman ◽  
...  
Keyword(s):  
Pilot Plant ◽  
Advanced Oxidation ◽  
Different Types ◽  
Uv Lamps
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