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EC number: 274-572-7
CAS number: 70331-94-1
of test item on oxygen consumption of activated sludge
Conc. of test item in test mix (mg/L)
Total oxygen consumption rate (RT) (mg O2/L/h)
Specific respiration rate (RS) (mg O2/L/h/g solid)
Temperature (°C) (measured in the Laboratory)*
Variation coefficient of O2consumption rate (%)
Individual pH values of the BOD flasks, except TI1-3, where the average
values are reported
Minimum/Maximum temperature (°C) measured in the Laboratory, during the
A laboratory test was
carried out with NAUGARD® XL-1 to evaluate the effect of the test item
on microorganisms by measuring the respiration rate.
The test concentrations (10,
100 and 1000 mg/L) were chosen to permit the determination of the
The reference control
results showed that in this study, the inoculum and methodology used
provided a good measure of inhibition of activated sludge respiration
Under the conditions of the
Activated Sludge, Respiration Inhibition Test (Carbon and Ammonium
Oxidation) the observed endpoint for the effect of NAUGARD® XL-1 was the
The 3-hour EC50: > 1000 mg/L
Based on the results of this
study, the test item NAUGARD® XL-1 had no inhibition effect on the total
respiration rate of the microorganisms of the activated sludge at
1000 mg/L. No further testing is necessary.
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