Rural Water - Quarter 4, 2013 - (Page 32)
Beat the Chill
Mountain District uses mixer to
eliminate ice and improve water quality
in storage tank
BY FOSTER WHITE, OPERATION/MANAGER, SOUTH OF LARAMIE WATER AND SEWER DISTRICT
RURAL WATER SYSTEMS across the United States face a range of challenges in maintaining water quality
in their distribution systems. Unlike large municipal systems, rural water systems often have a distribution
network that is spread out over many miles. This can result in high water age and low disinfectant residual
in parts of their system. Furthermore, many rural water systems purchase their finished water from a larger
municipality, which forces them to distribute water that is already several days old. The combination of
these issues with the added complication of low turnover in some water tanks and ice formation in winter
makes managing water quality in rural systems one of the toughest jobs in the water industry.
Figure 1. 300,000 gallon pedisphere in Laramie WY. Winter temperatures are commonly below freezing for weeks at a time.
Figure 2a. Ice conditions inside the tank prior to turning on the mixer. Note the damaged coatings above the water line.
Figure 2b. Ice conditions inside the tank after 24 hours of mixer operation. The ice has substantially melted and open water is visible in many areas.
Figure 2c. (see page 33) Ice conditions inside the tank after one week of mixer operation. Despite sub-freezing temperatures, the tank became ice-free.
32 * Fourth Quarter 2013
Table of Contents for the Digital Edition of Rural Water - Quarter 4, 2013
FROM THE PRESIDENT
STANDING IN THE GAP
LOVING LOUISVILLE: THE 2013 H2O-XPO IS A HIT
WATER/WASTEWATER INFRASTRUCTURE FINANCING
BEAT THE CHILL
THROWING MY LOOP
INDEX TO ADVERTISERS/ ADVERTISERS.COM
FROM THE CEO
Rural Water - Quarter 4, 2013