Registration Dossier

Environmental fate & pathways

Biodegradation in water and sediment: simulation tests

Currently viewing:

Administrative data

Endpoint:
biodegradation in water: sewage treatment simulation testing
Type of information:
experimental study
Adequacy of study:
supporting study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Comparable to guideline study with acceptable restrictions

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
1997
Report Date:
1997

Materials and methods

Test guideline
Qualifier:
according to
Guideline:
OECD Guideline 303 A (Simulation Test - Aerobic Sewage Treatment. A: Activated Sludge Units)
GLP compliance:
no

Test material

Reference
Name:
Unnamed
Type:
Constituent
Details on test material:
Test substance: as prescribed by 1.1 - 1.4

Study design

Oxygen conditions:
aerobic
Inoculum or test system:
activated sludge, domestic, non-adapted
Details on inoculum:
INOCULUM/TEST ORGANISM
- Source: municipal WWTP Marl-West, sampled 17 Feb 1984
- Pretreatment: fed into test apparatus ca. 40 min after sampling
Duration of test (contact time):
3 h
Initial test substance concentration
Initial conc.:
10.4 mg/L
Based on:
DOC
Parameter followed for biodegradation estimation:
DOC removal
Details on study design:
TEST SYSTEM
- Culturing apparatus: flow-through
- Number of culture flasks per concentration: 1
- Aeration device: pump
- Closed vessels used: no

TEST DURATION
- 34 days

Results and discussion

% Degradation
% Degr.:
68.9
St. dev.:
10.9
Parameter:
DOC removal
Sampling time:
34 d
Transformation products:
no

Any other information on results incl. tables

The mean of 24 measurements at approximately regular intervals is 68.86  +/- 10.90 % degradation.

Applicant's summary and conclusion