Registration Dossier
Registration Dossier
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EC number: - | CAS number: -
Biodegradation in water: screening tests
Administrative data
Link to relevant study record(s)
- Endpoint:
- biodegradation in water: ready biodegradability
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 5 June 1996 - 1 August 1996
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 301 C (Ready Biodegradability: Modified MITI Test (I))
- Deviations:
- no
- GLP compliance:
- yes
- Oxygen conditions:
- aerobic
- Inoculum or test system:
- activated sludge, non-adapted
- Details on inoculum:
- Sludge samples were collected from sewage plants and from surface water and surface soil.
The filtrate of the supernatant of the activated sludge used at the time was mixed all together with each of the filtrate of the supernatant of a newly collected sludge. The mixed filtrate was aerated sufficiently through open-air, after the pH value of the mixture was adjusted. - Duration of test (contact time):
- 28 d
- Initial conc.:
- 100 mg/L
- Based on:
- test mat.
- Parameter followed for biodegradation estimation:
- O2 consumption
- Reference substance:
- aniline
- Key result
- Parameter:
- % degradation (TOC removal)
- Value:
- 78
- Sampling time:
- 28 d
- Details on results:
- % biodegradation BOD: 73%
% biodegradation TOC: 78%
% biodegradation GC: 94% - Results with reference substance:
- % degradation of aniline by the BOD: 70% (day 7) and 73% (day 14).
- Validity criteria fulfilled:
- yes
- Interpretation of results:
- readily biodegradable
- Conclusions:
- The percentage of biodegradation of the test substance by measurement of biochemical oxygen demand is 73% , by determination of dissolved organic carbon is 78% and by gaz chromatography is 94%. It is considered that the test substance tented to be biodegradable by micoorganisms under the present test conditions.
Reference
Description of key information
The percentage of biodegradation of the test substance by measurement of biochemical oxygen demand is 73% , by determination of dissolved organic carbon is 78% and by gaz chromatography is 94%. It is considered that the test substance tented to be biodegradable by micoorganisms under the present test conditions.
Key value for chemical safety assessment
- Biodegradation in water:
- readily biodegradable
- Type of water:
- freshwater
Additional information
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