Role of typical pipes in disinfection chemistry within drinking water distribution system
Deep insight into the forces driving chloramine decay in different pipe materials is the key to taking sound action to cope with pipe water quality deterioration. By using the newly developed RTCDM (refined Total Chloramine Decay Model) and pipe section reactor, the role of four typical pipes in dis...
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IWA Publishing
2021
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oai:doaj.org-article:42eea60ed50f45bc9fda150456442f722021-11-06T07:12:50ZRole of typical pipes in disinfection chemistry within drinking water distribution system1606-97491607-079810.2166/ws.2020.376https://doaj.org/article/42eea60ed50f45bc9fda150456442f722021-05-01T00:00:00Zhttp://ws.iwaponline.com/content/21/3/1263https://doaj.org/toc/1606-9749https://doaj.org/toc/1607-0798Deep insight into the forces driving chloramine decay in different pipe materials is the key to taking sound action to cope with pipe water quality deterioration. By using the newly developed RTCDM (refined Total Chloramine Decay Model) and pipe section reactor, the role of four typical pipes in disinfection chemistry was qualitatively and quantitatively compared, and the mechanism of pipe wall mediated chloramine decay was further described. As for the four typical pipes studied, the characteristics of deteriorating water quality, especially for accelerating total chloramine decay was in the order of cast iron pipe > steel pipe > cement lined ductile iron pipe > polypropylene-random pipe. Cast iron pipes, cement-lined ductile iron pipes, and steel pipes of long service age are characterized by one or two driving forces leading to TCR decay. Aged cast iron pipes could take up chloramine by Fe(0) and microbes (especially nitrifiers) spreading over the inner wall. Aged steel pipe is characterized by aggressive electrochemical corrosion and weak nitrification. Lime and gypsum leaching is the main cause, and nitrification/denitrification may also occur in aged cement-lined ductile iron pipe. Polypropylene-random pipes have a minimum effect on disinfection chemistry. This knowledge is of value in speculating the reasons leading to TCR loss in the full scale distribution system. HIGHLIGHTS The developed RTCDM has good performance for predicting TCR decay in the bulk phase.; The ability to accelerate TCR decay was in the order cast iron (CI) > steel > cement lined DI > polypropylene random copolymer (PPR).; Chemical corrosion and nitrification are the main causes of TCR consumption for aged CI pipe.; Aggressive corrosion and weak nitrification are the main causes of TCR lost for aged steel pipe.;Kai MaXiazhen JiaHongda HanLin ZhaoDongmei FanJiankun HuRong LiXiao SuIWA Publishingarticleautodecompositiondisinfection chemistryelectrochemical corrosionnitrificationtotal chloramine decay modelWater supply for domestic and industrial purposesTD201-500River, lake, and water-supply engineering (General)TC401-506ENWater Supply, Vol 21, Iss 3, Pp 1263-1276 (2021) |
| institution |
DOAJ |
| collection |
DOAJ |
| language |
EN |
| topic |
autodecomposition disinfection chemistry electrochemical corrosion nitrification total chloramine decay model Water supply for domestic and industrial purposes TD201-500 River, lake, and water-supply engineering (General) TC401-506 |
| spellingShingle |
autodecomposition disinfection chemistry electrochemical corrosion nitrification total chloramine decay model Water supply for domestic and industrial purposes TD201-500 River, lake, and water-supply engineering (General) TC401-506 Kai Ma Xiazhen Jia Hongda Han Lin Zhao Dongmei Fan Jiankun Hu Rong Li Xiao Su Role of typical pipes in disinfection chemistry within drinking water distribution system |
| description |
Deep insight into the forces driving chloramine decay in different pipe materials is the key to taking sound action to cope with pipe water quality deterioration. By using the newly developed RTCDM (refined Total Chloramine Decay Model) and pipe section reactor, the role of four typical pipes in disinfection chemistry was qualitatively and quantitatively compared, and the mechanism of pipe wall mediated chloramine decay was further described. As for the four typical pipes studied, the characteristics of deteriorating water quality, especially for accelerating total chloramine decay was in the order of cast iron pipe > steel pipe > cement lined ductile iron pipe > polypropylene-random pipe. Cast iron pipes, cement-lined ductile iron pipes, and steel pipes of long service age are characterized by one or two driving forces leading to TCR decay. Aged cast iron pipes could take up chloramine by Fe(0) and microbes (especially nitrifiers) spreading over the inner wall. Aged steel pipe is characterized by aggressive electrochemical corrosion and weak nitrification. Lime and gypsum leaching is the main cause, and nitrification/denitrification may also occur in aged cement-lined ductile iron pipe. Polypropylene-random pipes have a minimum effect on disinfection chemistry. This knowledge is of value in speculating the reasons leading to TCR loss in the full scale distribution system. HIGHLIGHTS
The developed RTCDM has good performance for predicting TCR decay in the bulk phase.;
The ability to accelerate TCR decay was in the order cast iron (CI) > steel > cement lined DI > polypropylene random copolymer (PPR).;
Chemical corrosion and nitrification are the main causes of TCR consumption for aged CI pipe.;
Aggressive corrosion and weak nitrification are the main causes of TCR lost for aged steel pipe.; |
| format |
article |
| author |
Kai Ma Xiazhen Jia Hongda Han Lin Zhao Dongmei Fan Jiankun Hu Rong Li Xiao Su |
| author_facet |
Kai Ma Xiazhen Jia Hongda Han Lin Zhao Dongmei Fan Jiankun Hu Rong Li Xiao Su |
| author_sort |
Kai Ma |
| title |
Role of typical pipes in disinfection chemistry within drinking water distribution system |
| title_short |
Role of typical pipes in disinfection chemistry within drinking water distribution system |
| title_full |
Role of typical pipes in disinfection chemistry within drinking water distribution system |
| title_fullStr |
Role of typical pipes in disinfection chemistry within drinking water distribution system |
| title_full_unstemmed |
Role of typical pipes in disinfection chemistry within drinking water distribution system |
| title_sort |
role of typical pipes in disinfection chemistry within drinking water distribution system |
| publisher |
IWA Publishing |
| publishDate |
2021 |
| url |
https://doaj.org/article/42eea60ed50f45bc9fda150456442f72 |
| work_keys_str_mv |
AT kaima roleoftypicalpipesindisinfectionchemistrywithindrinkingwaterdistributionsystem AT xiazhenjia roleoftypicalpipesindisinfectionchemistrywithindrinkingwaterdistributionsystem AT hongdahan roleoftypicalpipesindisinfectionchemistrywithindrinkingwaterdistributionsystem AT linzhao roleoftypicalpipesindisinfectionchemistrywithindrinkingwaterdistributionsystem AT dongmeifan roleoftypicalpipesindisinfectionchemistrywithindrinkingwaterdistributionsystem AT jiankunhu roleoftypicalpipesindisinfectionchemistrywithindrinkingwaterdistributionsystem AT rongli roleoftypicalpipesindisinfectionchemistrywithindrinkingwaterdistributionsystem AT xiaosu roleoftypicalpipesindisinfectionchemistrywithindrinkingwaterdistributionsystem |
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1718443790422769664 |