Monochloramine Cometabolism by Ammonia-Oxidizing Bacteria [Project #4341]
نویسندگان
چکیده
The hypothesis of this research was that under some conditions, monochloramine cometabolism causes disinfectant loss in distribution systems, and is a defense mechanism that allows nitrifiers to persist in pipe-wall biofilm. The research objectives were to (1) define the relative significance of monochloramine cometabolism in causing disinfectant loss over the typical range of conditions encountered in drinking water distribution systems, and (2) provide a mathematical description of monochloramine cometabolism for inclusion in distribution system water quality models (e.g., EPANET-MSX).
منابع مشابه
Monochloramine Cometabolism by Nitrifying Biofilm Relevant to Drinking Water
2016 © American Water Works Association JOURNAL AWWA JULY 2016 | 108:7 Chloramine use is widespread in US drinking water distribution systems as a secondary disinfectant, and its use is predicted to increase with the final implementation of the Stage 2 Disinfectants and Disinfection Byproducts Rule (USEPA 2005). Chloramination is beneficial from the perspective of controlling formation of regul...
متن کاملInhibition, Inactivation, and Recovery of Ammonia-Oxidizing Activity in Cometabolism of Trichloroethylene by Nitrosomonas europaea.
The kinetics of the cometabolism of trichloroethylene (TCE) by the ammonia-oxidizing soil bacterium Nitrosomonas europaea in short-term (<10-min) incubations were investigated. Three individual effects of TCE cometabolism on this bacterium were characterized. First, we observed that TCE is a potent competitive inhibitor of ammonia oxidation by N. europaea. The K(infi) value for TCE (30 (mu)M) i...
متن کاملUncertainty and sensitivity analyses using GLUE when modeling inhibition and pharmaceutical cometabolism during nitrification
The influence of uncertainties in biokinetic parameters for ammonia and nitrite oxidizing bacteria on the performance of a two-step nitrification model was evaluated using the Generalized Uncertainty Estimation (GLUE) technique. The predictive capability of behavioral simulations generated using GLUE was assessed utilizing data from experiments comparing nitrification in the presence and absenc...
متن کاملAmmonia-oxidizing bacteria in a chloraminated distribution system: seasonal occurrence, distribution and disinfection resistance.
Nitrification in chloraminated drinking water can have a number of adverse effects on water quality, including a loss of total chlorine and ammonia-N and an increase in the concentration of heterotrophic plate count bacteria and nitrite. To understand how nitrification develops, a study was conducted to examine the factors that influence the occurrence of ammonia-oxidizing bacteria (AOB) in a c...
متن کاملDiversity of oxygenase genes from methane- and ammonia-oxidizing bacteria in the Eastern Snake River Plain aquifer.
PCR amplification, restriction fragment length polymorphism, and phylogenetic analysis of oxygenase genes were used for the characterization of in situ methane- and ammonia-oxidizing bacteria from free-living and attached communities in the Eastern Snake River Plain aquifer. The following three methane monooxygenase (MMO) PCR primer sets were used: A189-A682, which amplifies an internal region ...
متن کامل