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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:
1987
Reliability:
4 (not assignable)
Rationale for reliability incl. deficiencies:
documentation insufficient for assessment

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
1987
Report Date:
1987

Materials and methods

Test guideline
Qualifier:
no guideline available
Principles of method if other than guideline:
- Principle of test: Biochemical oxygen demand determined after 5 d at 20°C inoculation; COD via titration
- Parameters analysed / observed: oxygen content at 0 h and after 5 d inoculation
GLP compliance:
no

Test material

Reference
Name:
Unnamed
Type:
Constituent
Test material form:
solid
Details on test material:
Acid Red 299
Erionyl Rubin 5BLF 200%

Study design

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

Results and discussion

% Degradation
Parameter:
other: BOD5
Remarks on result:
other: BOD5 measurement

BOD5 / COD results

BOD5 / CODopen allclose all
Key result
Parameter:
BOD5
Value:
42 mg O2/g test mat.
Parameter:
COD
Value:
1 494 mg O2/g test mat.

Applicant's summary and conclusion

Validity criteria fulfilled:
not applicable
Interpretation of results:
under test conditions no biodegradation observed
Conclusions:
The ratio BOD5 / COD is 0.03 indicating no potential for ready biodegradation.