Comparison of the microbiomes of two drinking water distribution systems-with and without residual chloramine disinfection.

ABSTRACT:

Background

Residual disinfection is often used to suppress biological growth in drinking water distribution systems (DWDSs), but not without undesirable side effects. In this study, water-main biofilms, drinking water, and bacteria under corrosion tubercles were analyzed from a chloraminated DWDS (USA) and a no-residual DWDS (Norway). Using quantitative real-time PCR, we quantified bacterial 16S rRNA genes and ammonia monooxygenase genes (amoA) of Nitrosomonas oligotropha and ammonia-oxidizing archaea-organisms that may contribute to chloramine loss. PCR-amplified 16S rRNA genes were sequenced to assess community taxa and diversity.

Results

The chloraminated DWDS had lower biofilm biomass (P=1×10^-6) but higher N. oligotropha-like amoA genes (P=2×10^-7) t

SUBMITTER: Waak MB 

PROVIDER: S-EPMC6556008 | biostudies-literature | 2019 Jun

REPOSITORIES: biostudies-literature