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EC number: -
CAS number: -
This study was performed to assess the effect of FAT 40863/A TE on the respiration of activated sewage sludge.
This study was performed to assess the effect of the test item on
the respiration of activated sewage sludge. The method followed was
designed to be compatible with the OECD Guidelines for Testing of
Chemicals (2010) No. 209 "Activated Sludge, Respiration Inhibition Test
(Carbon and Ammonium Oxidation)".
Activated sewage sludge was exposed to an aqueous solution of the
test item at concentrations of 10, 100 and 1000 mg/L (3 replicates of
the 1000 mg/L test concentration) for a period of 3 hours at a
temperature of approximately 20°C with the addition of a synthetic
sewage as a respiratory substrate.
The rate of respiration was determined after 3 hours contact time
and compared to data for the control and a reference item,
The effect of the test item on the respiration of activated sewage
sludge gave a 3‑Hour EC50value of greater than 1000
mg/L. The No Observed Effect Concentration (NOEC) after 3 hours exposure
It was considered unnecessary and unrealistic to test at
concentrations in excess of 1000 mg/L.
The reference item gave a 3-Hour EC50value of 9.5 mg/L,
95% confidence limits 7.5 - 12 mg/L.
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