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dc.contributor.authorBal Krishna, K
dc.contributor.authorSathasivan, Arumugam
dc.identifier.citationBal Krishna, K and Sathasivan, Arumugam. 2012. Effect of silver in severely nitrified chloraminated bulk waters. Water Science and Technology: Water Supply 12 (4): pp. 415-421.

Chloramine has been widely used in many water utilities as a secondary disinfectant because of increased concern over disinfection by-products (DBPs) formation. However, its popularity has been affected due to microbial acceleration, which is traditionally believed to be by nitrifying organisms or their products such as nitrite and pH value which change substantially under nitrifying conditions. With the traditional belief in mind, the conventional approach to solve 'chloramine decay' was aimed at killing or flushing out nitrifiers. We have recently shown that either soluble microbial products (SMPs) released by microbes or changes in natural organic matter (NOM) characteristics under nitrified conditions could be responsible for the acceleration. With this new insight, a new control strategy was attempted by dosing silver at a concentration of 0.1 mg-Ag/L to the nitrified bulk waters obtained in a laboratory scale system. Accelerated chemical and microbial chloramine losses were significantly reduced after the addition of silver. These results are very promising for future applications.

dc.publisherIWA Publishing
dc.subjectMild nitrification
dc.subjectSevere nitrification
dc.subjectDistribution system
dc.titleEffect of silver in severely nitrified chloraminated bulk waters
dc.typeJournal Article
dcterms.source.titleWater Science and Technology: Water Supply
curtin.accessStatusFulltext not available

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