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Environmental fate & pathways

Biodegradation in water: screening tests

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Administrative data

Endpoint:
biodegradation in water: screening test, other
Type of information:
experimental study
Adequacy of study:
weight of evidence
Study period:
1980
Reliability:
4 (not assignable)
Rationale for reliability incl. deficiencies:
documentation insufficient for assessment

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
1980
Report Date:
1980

Materials and methods

Test guideline
Qualifier:
equivalent or similar to
Guideline:
EU Method C.5 (Degradation: Biochemical Oxygen Demand)
GLP compliance:
no

Test material

Reference
Name:
Unnamed
Type:
Constituent
Test material form:
solid
Details on test material:
Disperse Red 277

Study design

Oxygen conditions:
aerobic
Inoculum or test system:
activated sludge, non-adapted
Duration of test (contact time):
5 d
Initial test substance concentration
Initial conc.:
1 g/L
Based on:
test mat.
Parameter followed for biodegradation estimation
Parameter followed for biodegradation estimation:
O2 consumption

Results and discussion

% Degradation
Parameter:
other: BOD5
Remarks on result:
other: see BOD5 and COD

BOD5 / COD results

BOD5 / CODopen allclose all
Parameter:
BOD5
Value:
40 mg O2/g test mat.
Parameter:
COD
Value:
1 310 mg O2/g test mat.

Applicant's summary and conclusion

Validity criteria fulfilled:
not specified
Interpretation of results:
under test conditions no biodegradation observed
Conclusions:
Based on the COD and BOD5 measurements, a ratio of 0.03 was calculated. The test item does not show any potential for biodegradation.