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Environmental fate & pathways

Biodegradation in water: screening tests

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Administrative data

Endpoint:
biodegradation in water: ready biodegradability
Type of information:
migrated information: read-across from supporting substance (structural analogue or surrogate)
Adequacy of study:
weight of evidence
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Data from OECD SIDS (2004)

Data source

Reference
Reference Type:
publication
Title:
Unnamed
Year:
1995

Materials and methods

Test guideline
Qualifier:
according to
Guideline:
other: Directive 92/69/EEC, Part 7, page: 216 (MITI I)
GLP compliance:
not specified

Test material

Reference
Name:
Unnamed
Type:
Constituent

Study design

Oxygen conditions:
aerobic
Inoculum or test system:
other: activated sludge, domestic and industrial, non-adapted
Duration of test (contact time):
28 d
Initial test substance concentration
Initial conc.:
100 mg/L
Based on:
test mat.
Parameter followed for biodegradation estimation
Parameter followed for biodegradation estimation:
O2 consumption

Results and discussion

% Degradationopen allclose all
Parameter:
% degradation (O2 consumption)
Value:
8.7
Sampling time:
1 d
Parameter:
% degradation (O2 consumption)
Value:
23.7
Sampling time:
2 d
Parameter:
% degradation (O2 consumption)
Value:
55.3
Sampling time:
11 d
Parameter:
% degradation (O2 consumption)
Value:
57.5
Sampling time:
12 d
Parameter:
% degradation (O2 consumption)
Value:
70
Sampling time:
28 d
Details on results:
additional data:
21 d: 63.8 % BOD of ThOD

Applicant's summary and conclusion

Interpretation of results:
readily biodegradable, but failing 10-day window