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Environmental fate & pathways

Biodegradation in water: screening tests

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Administrative data

Endpoint:
biodegradation in water: screening tests
Type of information:
experimental study
Adequacy of study:
weight of evidence
Study period:
1974
Reliability:
4 (not assignable)
Rationale for reliability incl. deficiencies:
documentation insufficient for assessment

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
1974
Report Date:
1974

Materials and methods

Test guideline
Qualifier:
equivalent or similar to
Guideline:
EU Method C.5 (Degradation: Biochemical Oxygen Demand)
Principles of method if other than guideline:
BSB5 : Method DEV H5
CSB: Method DEV H4
pH=9.6 (conc. 1g/l)
GLP compliance:
no

Test material

Reference
Name:
Unnamed
Type:
Constituent
Test material form:
solid: particulate/powder

Study design

Oxygen conditions:
aerobic
Inoculum or test system:
activated sludge (adaptation not specified)
Duration of test (contact time):
5 d

Results and discussion

% Degradation
Remarks on result:
other: BOD5/COD

BOD5 / COD results

BOD5 / CODopen allclose all
Key result
Parameter:
BOD5
Value:
12 mg O2/g test mat.
Parameter:
COD
Value:
617 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:
The substance has a BOD5 of 12 mg O2/g test mat. The ratio BOD5/COD is ca. 2, not indicating any potential for biodegradation.