scholarly journals Microbial composition of purified waters and implications for regrowth control in municipal water systems

2015 ◽  
Vol 1 (6) ◽  
pp. 882-892 ◽  
Author(s):  
Caitlin R. Proctor ◽  
Marc A. Edwards ◽  
Amy Pruden
Keyword(s):  
Water Treatment ◽  
Water Systems ◽  
Microbial Composition ◽  
Municipal Water ◽  
Microbial Regrowth

The limits of water treatment to control microbial regrowth were examined using highly purified waters.

Conduit Hydropower for Municipal Water Systems

2015 ◽  
Vol 2015 (2) ◽  
pp. 1-9
Author(s):  
Todd J Briggeman ◽  
Dennis J Hogan
Keyword(s):  
Water Systems ◽  
Municipal Water

scholarly journals Microbial Fouling of a Reverse Osmosis Municipal Water Treatment System

2008 ◽  
Vol 80 (8) ◽  
pp. 703-707 ◽  
Author(s):  
Steven J. Wright ◽  
Jeremy D. Semrau ◽  
David R. Keeney
Keyword(s):  
Water Treatment ◽  
Reverse Osmosis ◽  
Treatment System ◽  
Water Treatment System ◽  
Municipal Water

scholarly journals Effect of ultrasonic and thermal disintegration of water treatment sludge

2018 ◽  
Vol 44 ◽  
pp. 00045
Author(s):  
Justyna Górka ◽  
MaŁgorzata Cimochowicz-Rybicka ◽  
Beata Fryźlewicz-Kozak
Keyword(s):  
Water Treatment ◽  
Main Parameter ◽  
Treatment Plant ◽  
Water Treatment Plant ◽  
Water Treatment Sludge ◽  
Disintegration Process ◽  
Municipal Water ◽  
Ultrasound Intensity ◽  
Sludge Production

This research was conducted to evaluate the effects of thermal and ultrasound disintegration on the disintegration degree (DD) of water treatment sludge from a municipal water treatment plant. A disintegration process was used to (i) improve subsequent coagulation efficiencies and dewatering processes (ii) reduce sludge production, and (iii) obtain both economic and enviromental benefits. The results show that using the disintegration process has an influence on DD values. It is also worth emphasising that the main parameter determining the efficiency of ultrasonic and thermal disintegration was the time of the applied process. Other parameters such as ultrasound intensity and temperature had a reduced impact on DD values.

scholarly journals Introduction of Monochloramine into a Municipal Water System: Impact on Colonization of Buildings by Legionella spp

2006 ◽  
Vol 72 (1) ◽  
pp. 378-383 ◽  
Author(s):  
Matthew R. Moore ◽  
Marsha Pryor ◽  
Barry Fields ◽  
Claressa Lucas ◽  
Maureen Phelan ◽  
...  
Keyword(s):  
Potable Water ◽  
Sampling Site ◽  
Water System ◽  
Water Source ◽  
Water Systems ◽  
Hot Water ◽  
County Government ◽  
Single Family ◽  
Pinellas County ◽  
Municipal Water

ABSTRACT Legionnaires' disease (LD) outbreaks are often traced to colonized potable water systems. We collected water samples from potable water systems of 96 buildings in Pinellas County, Florida, between January and April 2002, during a time when chlorine was the primary residual disinfectant, and from the same buildings between June and September 2002, immediately after monochloramine was introduced into the municipal water system. Samples were cultured for legionellae and amoebae using standard methods. We determined predictors of Legionella colonization of individual buildings and of individual sampling sites. During the chlorine phase, 19 (19.8%) buildings were colonized with legionellae in at least one sampling site. During the monochloramine phase, six (6.2%) buildings were colonized. In the chlorine phase, predictors of Legionella colonization included water source (source B compared to all others, adjusted odds ratio [aOR], 6.7; 95% confidence interval [CI], 2.0 to 23) and the presence of a system with continuously circulating hot water (aOR, 9.8; 95% CI, 1.9 to 51). In the monochloramine phase, there were no predictors of individual building colonization, although we observed a trend toward greater effectiveness of monochloramine in hotels and single-family homes than in county government buildings. The presence of amoebae predicted Legionella colonization at individual sampling sites in both phases (OR ranged from 15 to 46, depending on the phase and sampling site). The routine introduction of monochloramine into a municipal drinking water system appears to have reduced colonization by Legionella spp. in buildings served by the system. Monochloramine may hold promise as community-wide intervention for the prevention of LD.

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