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 Figure 2a 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 Figure 2b

Table of Contents for the Digital Edition of Rural Water - Quarter 4, 2013

FROM THE PRESIDENT
STANDING IN THE GAP
RETIREMENT READINESS
LOVING LOUISVILLE: THE 2013 H2O-XPO IS A HIT
WATER/WASTEWATER INFRASTRUCTURE FINANCING
GO PAPERLESS!
BEAT THE CHILL
REGULATORY UPDATE
THROWING MY LOOP
INDEX TO ADVERTISERS/ ADVERTISERS.COM
FROM THE CEO

Rural Water - Quarter 4, 2013

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