Aluminium Facility Reduces Biofilm and Corrosion in Process Cooling System

GoalReduce microbial activity in process cooling system.

<h6>Customer Challenge</h6> <p>A North American aluminium facility had high microbiological (MB) demand in its foundry water supply, which impeded the effectiveness of its ClO2 control program. Corrosion rates increased due to rising chlorides and ClO2 off-gassing in critical process equipment. Significant algae and slime growth occurred in the cooling tower. As a result, the plant had significant challenges with water quality and screen blockages.</p> <h6>Recommended Solution</h6> <p>Solenis recommended replacing the ClO2 system with ClearPointSM biofilm detection and control program. Comprised of three components&mdash;OnGuard&trade; 3B analyzer, Biosperse&trade; CX3195 chlorine stabilizer, and Solenis&rsquo; superior service&mdash;the ClearPoint program offers real-time biofouling measurements and automatically adjusts the CX3195 feed rates to ensure program control 24/7.</p> <h6>Results Achieved</h6> <p>The ClearPoint program provided significant benefits that were measurable and quantifiable as follows:</p> <ul> <li>Improved specificity and reactivity for microorganisms, significantly reducing MB levels as measured by ATP and bug counts&nbsp;</li> <li>Reduced bleach consumption and eliminated sulphuric acid use&nbsp;</li> <li>Improved workplace safety due to the elimination of chlorite handling and storage and potential ClO2 gas concerns&nbsp;</li> <li>Reduced Larson-Skold Index from 4 to below 1, significantly reducing mild steel corrosion (from 20 mpy to less than 2 mpy)</li> </ul> <p><img style="max-width: 100%; width: auto; height: auto; display: block; margin-left: auto; margin-right: auto;" src="/link/8e6223fad98c4e8dad8b566e4b95cdbc.aspx" alt="" width="1000" height="790" /></p>