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The South Valley Sewer District, located outside of Salt Lake City, Utah, experienced severe degradation of the concrete substrate the Membrane Basins at the Jordan Basin WRF. The Bowen Collins & Associates designed facility initially opened for service in July of 2012. By 2017 the facility was showing significant effects of concrete deterioration from chemical attack, caused by citric acid and sodium hypochlorite used as a part of the cleaning procedures in the membrane basins.
The South Valley Sewer District, located outside of Salt Lake City, Utah, experienced severe degradation of the concrete substrate the Membrane Basins at the Jordan Basin WRF. The Bowen Collins & Associates designed facility initially opened for service in July of 2012. By 2017 the facility was showing significant effects of concrete deterioration from chemical attack, caused by citric acid and sodium hypochlorite used as a part of the cleaning procedures in the membrane basins. This paper explains the background that led to the rehabilitation required; the teamwork employed by the engineer, and its corrosion consultant and select coatings manufacturers to develop rehabilitation solutions
The County of Madison, MS. experienced severe degradation of a major pump station in their system that was less than 10 years old. They contracted with Waggoner Engineering of Jackson, MS. to design a rehabilitation system as well as increase the structural integrity with the addition of some support walls. The project created scheduling issues due to the addition of new concrete structures to the pump station. The use of innovative coatings technologies that offered the ability to apply corrosion resistant linings over green concrete structures, dramatically enhanced the project schedule and reduced overall costs.
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Wastewater treatment plant clarifier environments present challenges for selecting materials of construction. Coated carbon steel, hot-dip galvanized steel, and stainless steel are most commonly specified for new or refurbished clarifier mechanisms, and all have their advantages and disadvantages with regard to achieving the intended design life.
Epoxy linings have long been the standard generic resin type when specifiers are selecting products for lining new steel potable water tanks or rehabilitating existing steel potable water storage tanks in North America. The one exception to this rule has been the Canadian potable water storage market. In Canada many specifiers have recognized the benefits offered by 100% Solids Elastomeric Polyurethane linings for 25+ years with admirable results.