CASE HISTORY CL6033 Closed System Treatment Northeastern Biotechnology Building Continually plagued with biocontrol prob- lems, ChemTreat converted the chill water loop in a large biotechnology facil- ity formerly treated with nitrite. Thousands of ppm of nitrite were being consumed, leaving acidic pH, loss of inhibitor, and biofouling. Nonoxidizing biocide applica- tions would temporarily control nitrite loss; however, the cost of repeate

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