[No public or meaningful name is available]

Biodegradation in water: screening tests

Administrative data

Endpoint:

biodegradation in water: ready biodegradability

Type of information:

experimental study

Adequacy of study:

key study

Reliability:

1 (reliable without restriction)

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2009

Report date:

2009

Materials and methods

Test guideline

Qualifier:

according to guideline

Guideline:

OECD Guideline 301 F (Ready Biodegradability: Manometric Respirometry Test)

Version / remarks:

EU Method C.4-D (Determination of the "Ready" Biodegradability - Manometric Respirometry Test)

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Test material

Reference

Name:

Unnamed

Type:

Constituent

Study design

Oxygen conditions:

aerobic

Inoculum or test system:

activated sludge (adaptation not specified)

Details on inoculum:

Source: sewage treatment plant Ruhrverband Kläranlage, Schmallenberg, Germany; kept aerobic until use; conc. used in test: 29.6 mg dry mass/l (= 7.39 mg dry mass/250 ml)

Duration of test (contact time):

28 d

Initial test substance concentration

Initial conc.:

100 mg/L

Based on:

test mat.

Parameter followed for biodegradation estimation

Parameter followed for biodegradation estimation:

O2 consumption

Results and discussion

% Degradation

Parameter:

% degradation (O2 consumption)

Value:

31

Sampling time:

28 d

Details on results:

biodegradation within 10-day window: 21%

Applicant's summary and conclusion

Validity criteria fulfilled:

yes

Conclusions:

test item not readily biodegradable under the chosen test conditions