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Phosphorus-free cooling water treatment

By Scott Jenkins |

A new technology for treating cooling tower water is designed to control scale formation and provide corrosion protection without using phosphorus-containing compounds. Phosphorus from wastewater discharge is known to be a major factor in fueling algae blooms and excessive aquatic plant growth, which can have a severe negative impact on the ecosystems of lakes, rivers and bays. As a result, regulations governing allowed levels of phosphorus in cooling-tower-water discharge have become increasingly stringent, reaching 0.075 to 0.04 parts-per-million (ppm) in sensitive areas. U.S. Water Services, Inc. (U.S. Water; St. Michael, Minn.; www.uswaterservices.com) has launched a product, known as PhosZero, that uses a proprietary blend of organic carboxylic acid materials and organic polymers and copolymers to control scale and prevent corrosion without the need for phosphorus-containing chemicals. The anti-scale components work by threshold inhibition, crystal lattice modification and dispersion, and the corrosion production is achieved through the formation of a protective iron-oxide layer, explains LaMarr Barnes, U.S. Water’s vice president of Marketing and Business Development. The blend of ingredients in PhosZero gives rise to synergistic…
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