OECD SIDS 3. ENVIRONMENTAL FATE AND PATHWAYS
ID: 79-50-5 DATE: 18.01.2006
dl-lactone The default Biodegradat therefore t text entry. The result net degrada in sludge b Degradation Time, d
and calculated as percent degradation.
Kinetic of test substance array in IUCLID 3.5, ion does not allow negative degradation values, he kinetics had to be presented in a Results free
from this test is only given as a printout of the tion curve over time (BOD in test vessel minus BOD lank divided by COD, given as percent).
kinetics, [BOD(dl-lactone)-BOD(blank)]/COD, % Degradation, %
Test substance: Conclusion:
The test was stopped after de and remained there for two da
phase suggests adaptation valid with restrictions
gradation had reach ys. , not otherwise cha ly biodegradable in
an initial lag pha gradation (test sub
just under four da tion curve starts r rom crossing the ze
of the (non-adapte
ed a plateau
this se consisting stance BOD ys of negative ising steeply, ro line. The d) sludge.
rom the in-house wa ed test in a profes experience.
stewater lab, sional
Concentration: Contact time: Degradation: Result: Kinetic:
aerobic other: activated sludge, mixed domestic and industrial, non-adapted 1000 mg/l related to Test substance 21 day(s)
98 % after 21 day(s)
ca. 97 %
ca. 90 %
ca. 31 %
other: peptone/yeast extract as substrate for co-metabolic degradation
Kinetic: Deg. product:
21 day(s) not measured
other: comparable to OECD Guide-line 302 C 1983