Polymers are used in the headworks of wastewater treatment plants to facilitate the flocculation or coagulation of suspended solids to produce large curds of solid materials. They also aid in de-watering of digester cake, reducing the water content and permitting easier, less expensive transport of waste materials to the landfill.
A polymer is a very large organic molecule; it is a chain of monomer subunits. Some of the monomer molecules have positive or negative charges.
Polymer chains (image, right) vary in length from thousands to millions of monomer units. If each monomer molecule was the size of a pearl, the chain length of most polymers would be 400 to 8,000 feet long!
Polymers present unique storage challenges and require the right storage solution for safety and cost effectiveness. Let’s explore these challenges and solutions.
Polymer Storage Challenges
Cationic and anionic are high molecular weight polymers. Polymers are very slippery chemicals, leading to slips and falls from spills or leaks. Polymers can be delivered concentrated; other times they require blending. In addition, polymers can be an environmental stress crack agent to some linear polyethylene materials. They also can be delivered at high temperatures, making the correct storage tank choice crucial.
4 Polymer Storage Tips
Require Superior Tank Strength: High density cross-linked polyethylene offers superior strength at a long-term cost advantage for storage of high weight polymers. Poly Processing Company’s XLPE tanks offer economies of scale for polymer storage for the size of the tank as opposed to fiberglass.
Minimize Leaks: To reduce the potential for leaks and spills and minimize slips and falls, it’s important to limit sidewall penetrations of the storage tank. With Poly Processing’s Integrally Molded Flanged Outlet, or IMFO® system, the flange is molded into the bottom of the tank, minimizing sidewall fittings and additional potential for leaks. Since the flange is created from the same material as the tank – it’s not an insert introduced during or at post production – the IMFO® system provides the superior tank strength required for storing heavy weight polymers.
Permits Easy Blending: Open top tanks are available in a variety of sizes. Tanks can be highly customized to accommodate a mixer used in your operation.
Minimize Corrosion: As opposed to steel or fiberglass, Poly Processing high density cross-linked polyethylene tanks offer a cost effective, durable, high strength storage solution that resists corrosion.
Polymers are necessary chemicals for cost effective removal of solid wastes in water treatment operations. Engineered products are required to meet the unique challenges of storing polymers. Poly Processing has over 40 years of experience storing polymers and help engineer the safe and effective system you need.