PeroxyMAX has demonstrated the least impact to nylon felt fiber at expected “safe harbor” levels for microbial control and bleach plant carry-over concentrations on fine paper machines. Other published work has demonstrated severe felt damage caused by ClO2 carry-over from the bleach plant.
The tensile strength of the nylon felt fiber demonstrates the relative level of degradation observed after exposure to published “safe harbor” concentrations at pH 7.5, 50° C for 200 hours with hypobromite at 0.3 ppm; hypochlorite at 0.5 ppm; hydrogen peroxide at 100 ppm; and, PeroxyMAX at 5 ppm.
Corrosivity of PeroxyMAX is similar to dissolved oxygen for materials and alloys commonly found in papermills and generally shows uniform corrosion rather than pit corrosion typical of chlorine products. Its low volatility means low vapor corrosion rates and low exposure hazard for workers.
PeroxyMAX is compatible with a variety of microbial control products and is expected to enhance existing biocide programs including those based on chlorine- and bromine-based oxidizing products and several non-oxidizing products such as quaternary ammonium compounds. An example of combining sodium hypochlorite and PeroxyMAX during treatment of an industrial wastewater (with diverse population of microorganisms) illustrates combined benefits for microbial reduction (ATP reduction) without chemical interference.
Oxidant Compatibility in Water Treatment
|Parameter||Untreated||5 ppm NaOCl||5 ppm NaOCl + 13 ppm NaPAc||Comment|
|pH||7.28||7.39||7.56||No material pH change|
|ORP (mV v. SHE)||474||652||708||Increased ORP|
|ATP (pg/mL)||4790||249||51.7||Substantial ATP decrease|
|% ATP Reduction||0||94.8%||98.9%|
|Free Cl2 (mg/L)||0||<0.5||<0.5||No change to chlorine levels|
|Total Cl2 (mg/L)||0||3||3||No change to chlorine levels|