Houston Light and Power now installs fiberglass-lined concrete storage basins for corrosive waste applications, according to lead engineers for the utility’s Jewett, TX plant. One of the basins is an organic retention pond that contains mostly organic cleaning waste which is then pumped out for on-site disposal. The largest pond is used for inorganics that contain metal cleaning waste. Prior to being discharged, the inorganics are circulated through a waste treatment system. There is also a chemical equalization basin for demineralizer and other chemical wastes. In the past, lignite-burning power plants often used dirt-lined or clay-based pits to store wastes such as carbon-containing acids, or inorganic acids and caustics. Now, however, such pits are believed to provide insufficient protection for corrosive applications.
The fabricator for the basins was Wil-Cor, Inc. of Houston. Specifications called for either a bisphenol resin or a vinyl ester resin for its chemical resistance, elongation, and workability properties in elevated temperatures. There are three basins lined with the vinyl ester resin from the Dow Chemical Company, constructed with more than 150, 000 square feet of concrete. Expansion joints, known as Omega® joints, developed for concrete expansion and contraction by Wil-Cor, were used in this project. Their design was developed to solve the problem of water and acid migration through existing expansion joints, as well as concrete contraction due to temperature changes.
Hazardous Waste Management Magazine/July/August 1988