scholarly journals Emerging investigators series: microbial communities in full-scale drinking water distribution systems – a meta-analysis

2016 ◽  
Vol 2 (4) ◽  
pp. 631-644 ◽  
Author(s):  
Quyen M. Bautista-de los Santos ◽  
Joanna L. Schroeder ◽  
Maria C. Sevillano-Rivera ◽  
Rungroch Sungthong ◽  
Umer Z. Ijaz ◽  
...  
Keyword(s):  
Drinking Water ◽  
Distribution Systems ◽  
Water Distribution ◽  
Meta Analysis ◽  
Water Distribution Systems ◽  
16S Rrna Gene Sequencing ◽  
Full Scale ◽  
Rrna Gene ◽  
Drinking Water Distribution Systems ◽  
Drinking Water Distribution

In this study, we co-analyze all available 16S rRNA gene sequencing studies from bulk drinking water samples in full-scale drinking water distribution systems.

scholarly journals Diversity of bacteria and mycobacteria in biofilms of two urban drinking water distribution systems

2012 ◽  
Vol 58 (3) ◽  
pp. 261-270 ◽  
Author(s):  
Ruyin Liu ◽  
Zhisheng Yu ◽  
Hongxun Zhang ◽  
Min Yang ◽  
Baoyou Shi ◽  
...  
Keyword(s):  
Drinking Water ◽  
Distribution Systems ◽  
Water Distribution ◽  
Water Distribution Systems ◽  
Full Scale ◽  
Rrna Gene ◽  
Mycobacterium Species ◽  
Drinking Water Distribution Systems ◽  
Gene Assay ◽  
Drinking Water Distribution

In this study, to give insight into the bacterial diversity of biofilms from full-scale drinking water distribution systems (DWDSs), the bacterial community compositions of biofilms from two urban DWDSs (Guangzhou and Beijing, China) were determined using a 16S rRNA gene library technique. Meanwhile, the occurrence and diversity of mycobacteria were also analyzed by a Mycobacterium -specific hsp gene assay. The biofilms from the full-scale DWDSs have complex bacterial populations. Proteobacteria was the common and predominant group in all biofilm samples, in agreement with previous reports. The community structures of bacteria at the three sites in Guangzhou DWDS were significantly different, despite the similar physicochemical properties of portable water. Some abundant and peculiar bacterial phylotypes were noteworthy, including Methylophilus , Massilia , and Planomicrobium , members of which are rarely found in DWDSs and their roles in DWDS biofilms are still unclear. The diversity of Mycobacterium species in biofilm samples was rather low. Mycobacterium arupense and Mycobacterium gordonae were the primary Mycobacterium species in Guangzhou and Beijing biofilms, respectively, indicating that M. arupense may be more resistant to chloride than M. gordonae.

scholarly journals Influence of water quality on nitrifier regrowth in two full-scale drinking water distribution systems

2015 ◽  
Vol 61 (12) ◽  
pp. 965-976 ◽  
Author(s):  
Daniel B. Scott ◽  
Michele I. Van Dyke ◽  
William B. Anderson ◽  
Peter M. Huck
Keyword(s):  
Water Quality ◽  
Drinking Water ◽  
Distribution Systems ◽  
Water Distribution ◽  
Water Distribution Systems ◽  
Quality Parameters ◽  
Full Scale ◽  
Water Quality Parameters ◽  
Drinking Water Distribution Systems ◽  
Drinking Water Distribution

The potential for regrowth of nitrifying microorganisms was monitored in 2 full-scale chloraminated drinking water distribution systems in Ontario, Canada, over a 9-month period. Quantitative PCR was used to measure amoA genes from ammonia-oxidizing bacteria (AOB) and ammonia-oxidizing archaea (AOA), and these values were compared with water quality parameters that can influence nitrifier survival and growth, including total chlorine, ammonia, temperature, pH, and organic carbon. Although there were no severe nitrification episodes, AOB and AOA were frequently detected at low concentrations in samples collected from both distribution systems. A culture-based presence–absence test confirmed the presence of viable nitrifiers. AOB were usually present in similar or greater numbers than AOA in both systems. As well, AOB showed higher regrowth potential compared with AOA in both systems. Statistically significant correlations were measured between several water quality parameters of relevance to nitrification. Total chlorine was negatively correlated with both nitrifiers and heterotrophic plate count (HPC) bacteria, and ammonia levels were positively correlated with nitrifiers. Of particular importance was the strong correlation between HPC and AOB, which reinforced the usefulness of HPC as an operational parameter to measure general microbiological conditions in distribution systems.

Suspended bacterial biomass and activity in full-scale drinking water distribution systems: Impact of water treatment

1998 ◽  
Vol 32 (5) ◽  
pp. 1393-1406 ◽  
Author(s):  
Michèle Prévost ◽  
Annie Rompré ◽  
Josée Coallier ◽  
Pierre Servais ◽  
Patrick Laurent ◽  
...  
Keyword(s):  
Drinking Water ◽  
Water Treatment ◽  
Distribution Systems ◽  
Water Distribution ◽  
Water Distribution Systems ◽  
Bacterial Biomass ◽  
Full Scale ◽  
Drinking Water Distribution Systems ◽  
Drinking Water Distribution

Effect of disinfectant residual, pH, and temperature on microbial abundance in disinfected drinking water distribution systems

2021 ◽  
Vol 7 (1) ◽  
pp. 78-92
Author(s):  
Lauren C. Kennedy ◽  
Scott E. Miller ◽  
Rose S. Kantor ◽  
Kara L. Nelson
Keyword(s):  
Drinking Water ◽  
Distribution Systems ◽  
Water Distribution ◽  
Water Distribution Systems ◽  
Full Scale ◽  
Microbial Abundance ◽  
Drinking Water Distribution Systems ◽  
Drinking Water Distribution ◽  
Statistical Approaches

This work demonstrates insights gained from monitoring absolute microbial abundance in full-scale disinfected drinking water distribution systems and lays a foundation for statistical approaches that could provide a basis for applying these tools.

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