Chlorine dioxide disinfection of drinking water—An evaluation of a treatment plant

1985 ◽  
Vol 19 (12) ◽  
pp. 1489-1495 ◽  
Author(s):  
B. Limoni ◽  
B. Teltsch
Keyword(s):  
Drinking Water ◽  
Chlorine Dioxide ◽  
Treatment Plant ◽  
Chlorine Dioxide Disinfection

scholarly journals Comparison of commercial analytical techniques for measuring chlorine dioxide in urban desalinated drinking water

2015 ◽  
Vol 13 (4) ◽  
pp. 970-984 ◽  
Author(s):  
T. A. Ammar ◽  
K. Y. Abid ◽  
A. A. El-Bindary ◽  
A. Z. El-Sonbati
Keyword(s):  
Drinking Water ◽  
Chlorine Dioxide ◽  
Distribution System ◽  
Analytical Techniques ◽  
Regulatory Compliance ◽  
Analytical Technique ◽  
Accuracy And Precision ◽  
Wide Range ◽  
Chlorine Dioxide Disinfection ◽  
Selection Of

Most drinking water industries are closely examining options to maintain a certain level of disinfectant residual through the entire distribution system. Chlorine dioxide is one of the promising disinfectants that is usually used as a secondary disinfectant, whereas the selection of the proper monitoring analytical technique to ensure disinfection and regulatory compliance has been debated within the industry. This research endeavored to objectively compare the performance of commercially available analytical techniques used for chlorine dioxide measurements (namely, chronoamperometry, DPD (N,N-diethyl-p-phenylenediamine), Lissamine Green B (LGB WET) and amperometric titration), to determine the superior technique. The commonly available commercial analytical techniques were evaluated over a wide range of chlorine dioxide concentrations. In reference to pre-defined criteria, the superior analytical technique was determined. To discern the effectiveness of such superior technique, various factors, such as sample temperature, high ionic strength, and other interferences that might influence the performance were examined. Among the four techniques, chronoamperometry technique indicates a significant level of accuracy and precision. Furthermore, the various influencing factors studied did not diminish the technique's performance where it was fairly adequate in all matrices. This study is a step towards proper disinfection monitoring and it confidently assists engineers with chlorine dioxide disinfection system planning and management.

Advanced Treatment of Municipal Wastewater Effluent by Coagulation/Sedimentation and Chlorine Dioxide Disinfection

2011 ◽  
Vol 71-78 ◽  
pp. 2792-2796
Author(s):  
Li Hua Cheng ◽  
Ai Hua He ◽  
Xue Jun Bi ◽  
Qi Wang
Keyword(s):  
Chlorine Dioxide ◽  
Municipal Wastewater ◽  
Removal Rate ◽  
Treatment Plant ◽  
Secondary Effluent ◽  
Tertiary Treatment ◽  
Combination Process ◽  
E Coli ◽  
Chlorine Dioxide Disinfection ◽  
Selection Of

Due to increasing water scarcity, reclamation and reuse of the secondary effluent of wastewater treatment plant are widely concerned in many countries. Before reuse, the residual contaminant in the secondary effluent should be further removed to guarantee safe reuse. Coagulation/sedimentation and subsequent chlorine dioxide(ClO2) disinfection was adopted for tertiary treatment of secondary effluent. Selection of coagulant and optimization of tertiary treatment parameters were performed in this study. The results showed that coagulation could remove turbidity and total phosphours(TP) effectively. Polyaluminium chloride(PAC) was the most suitable coagulant. The optimal coagulation condition was as follows: PAC dosage of 10mg/L(measured as Al3+), reaction time of 20 min, settling time of 40 min, in this case, the average removal rate of turbidity, color, UV254, TP and TOC could reach to 58.2%, 22.8%, 18.2%, 60.6% and 22.2%, respectively. ClO2could inactive bacteria andE. colieffectively. ClO2could further remove UV254, color and TOC. In case of ClO2dosage of 5mg/L, the sterilization efficiency could reach 100%, and the removal rate of UV254, color and TOC was higher than 25%, 70% and 25%, respectively. In the optimal condition, the removal efficiency of residual contaminant by the combination process was as follows: UV254of 45.9%, color of 76.5%, TOC of 66.7%, turbidity of 61.9% and TP of 96.3%.

Multispectral Identification of Chlorine Dioxide Disinfection Byproducts in Drinking Water

1994 ◽  
Vol 28 (4) ◽  
pp. 592-599 ◽  
Author(s):  
Susan D. Richardson ◽  
Alfred D. Thruston ◽  
Timothy W. Collette ◽  
Kathleen Schenck. Patterson ◽  
Benjamin W. Lykins ◽  
...  
Keyword(s):  
Drinking Water ◽  
Chlorine Dioxide ◽  
Disinfection Byproducts ◽  
Chlorine Dioxide Disinfection

scholarly journals Indigenous bacterial spores as indicators of Cryptosporidium inactivation using chlorine dioxide

2003 ◽  
Vol 1 (2) ◽  
pp. 91-100 ◽  
Author(s):  
Sophie Verhille ◽  
Ron Hofmann ◽  
Christian Chauret ◽  
Robert Andrews
Keyword(s):  
Drinking Water ◽  
Water Treatment ◽  
Chlorine Dioxide ◽  
Treatment Plant ◽  
Drinking Water Treatment ◽  
Water Treatment Plant ◽  
Common Species ◽  
Plant Performance ◽  
Inactivation Kinetics ◽  
Naturally Occurring

This objective of this study was to explore the practicality of monitoring naturally occurring organisms to predict drinking water treatment plant performance, in this case for the reduction of Cryptosporidium. Surface and ground water from seven drinking water treatment plants across North America that use chlorine dioxide were surveyed for aerobic and anaerobic bacterial spore concentrations. The concentrations of total spores were usually high enough in both raw and treated water to allow 4- to 5-log reductions to be observed across the treatment train by filtering up to 2 l of sample. These results suggested that naturally occurring treatment-resistant spores could be candidates as indicators of treatment performance. However, to be useful as indicators for Cryptosporidium reduction, the organisms would have to exhibit similar resistances to disinfection (chlorine dioxide in this case) in order to be useful. The inactivation kinetics of seven of the most common species were determined, and all were observed to be considerably more susceptible to chlorine dioxide inactivation than Cryptosporidium as reported in the literature. This study therefore did not identify an appropriate ambient microbial indicator for Cryptosporidium control.

Effects of reductive inorganics and NOM on the formation of chlorite in the chlorine dioxide disinfection of drinking water

2021 ◽  
Vol 104 ◽  
pp. 225-232
Author(s):  
Biao Yang ◽  
Hua Fang ◽  
Bingqi Chen ◽  
Shun Yang ◽  
Zhichao Ye ◽  
...  
Keyword(s):  
Drinking Water ◽  
Chlorine Dioxide ◽  
Chlorine Dioxide Disinfection

Preparation Process Optimization of the Solid Chlorine Dioxide as an Environmental Friendly Disinfectant for Drinking Water

2017 ◽  
Vol 737 ◽  
pp. 433-437
Author(s):  
Qun Li ◽  
Xiao Wen Li ◽  
Zi Chao Li ◽  
Xi Hui Zhao ◽  
Yue Wang ◽  
...  
Keyword(s):  
Drinking Water ◽  
Reaction Time ◽  
Reaction Temperature ◽  
Chlorine Dioxide ◽  
Treatment Plant ◽  
Drinking Water Treatment ◽  
Water Treatment Plant ◽  
Sodium Chlorite ◽  
Mass Ratio ◽  
Environmental Friendly

Disinfection is the last treatment process in the Drinking Water Treatment Plant. Chlorine dioxide (ClO2) is a widely used environmental friendly disinfectant which is employed in this process. The aim of this work was to optimize the reaction conditions and improve the formula of the solid chlorine dioxide disinfectant. Magnesium sulfate (MgSO4) and citric acid were employed as the stabilizer and activator, respectively. Sodium chlorite (NaClO2) and sodium bisulfate (NaHSO4) were used as the reactants. The concentration of chlorine dioxide was determined by the five-step iodometry method. The results showed that the percentage of chlorine dioxide have a relationship with the reaction temperature, reaction time, the mass ratio of NaClO2 and NaHSO4. The percentage of chlorine dioxide has a para-curve relationship with the reaction time. At 2.5 h, it reached the highest percentage of chlorine dioxide about 6.3%. And the optimal reaction temperature is 25°C under the nearly ideal state mass ratio of NaClO2:NaHSO4 =1:1.071. The formula is suggested to be a proper composition of the solid environmental friendly chlorine dioxide disinfectant.

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