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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:
experimental study
Adequacy of study:
key study
Study period:
16 Dec. 2002 to 16 Jan. 2003
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Screening test following OECD guideline, basic data given

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2003
Report Date:
2003

Materials and methods

Test guideline
Qualifier:
according to
Guideline:
OECD Guideline 301 A (Ready Biodegradability: DOC Die Away Test)
GLP compliance:
no

Test material

Reference
Name:
Unnamed
Type:
Constituent
Details on test material:
- Name of test material (as cited in study report):(R)-(+)-Phenylethylamin
- TOC = 785 mg/g
- DOC = 769 mg/g

Study design

Oxygen conditions:
aerobic
Inoculum or test system:
activated sludge, domestic, non-adapted
Details on inoculum:
- Source of inoculum/activated sludge: activated sludge taken from a laboratory wastewater treatment plant fed with municipal sewage.
- Laboratory culture: yes (washed and aerated for 24 hours before being added to the test vessels)
- Concentration of sludge: 30 mg/L (dry substance)
Duration of test (contact time):
28 d
Initial test substance concentrationopen allclose all
Initial conc.:
10 mg/L
Based on:
DOC
Initial conc.:
12 mg/L
Based on:
test mat.
Parameter followed for biodegradation estimation
Parameter followed for biodegradation estimation:
DOC removal
Reference substance
Reference substance:
aniline

Results and discussion

% Degradationopen allclose all
Parameter:
% degradation (DOC removal)
Value:
< 10
Sampling time:
10 d
Parameter:
% degradation (DOC removal)
Value:
ca. 47
Sampling time:
14 d
Parameter:
% degradation (DOC removal)
Value:
ca. 98
Sampling time:
17 d
Parameter:
% degradation (DOC removal)
Value:
ca. 98
Sampling time:
28 d

BOD5 / COD results

Results with reference substance:
Kinetic of control substance (in %): ca. 90 to 100 after 3 day(s)

Any other information on results incl. tables

- 10-days-window met: yes
- Adaptation phase: 11 days
- Degradation phase: 6 days

Applicant's summary and conclusion

Interpretation of results:
readily biodegradable