A dried sludge product resulting from the treatment process of domestic wastewater. The exact processes followed for the production of the dried sludge are: Preliminary + secondary treatment of the wastewater stream, thickening, dehydration and drying of the excess sludge.

Auto flammability

Link to relevant study record(s)

Reference

Endpoint:

relative self-ignition temperature (solids)

Type of information:

experimental study

Adequacy of study:

key study

Study period:

8 March 2021 – 16 March 2021

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

EU Method A.16 (Relative Self-Ignition Temperature for Solids)

Deviations:

no

Key result

Relative self-ignition temperature:

>= 147 - <= 153 °C

Remarks on result:

other: The sample’s self-ignition temperature is 150 ± 3 oC.

Conclusions:

The sample’s self-ignition temperature is 150 ± 3 oC.

Executive summary:

Dried waste sludge from a biological civic effluent treatment utility was examined to ascertain its relative self-ignition temperature.

 

The specific methods and results obtained are as follows:

Property	Method	Result
Relative self-ignition temperature	Monitoring internal temperature of a 25x25x25mm cube of material during heating inside an oven	The sample self-ignited when the oven temperature reached 150 ± 3^oC

Description of key information

Dried waste sludge from a biological civic effluent treatment utility was examined to ascertain its relative self-ignition temperature.

 

The specific methods and results obtained are as follows:

Property	Method	Result
Relative self-ignition temperature	Monitoring internal temperature of a 25x25x25mm cube of material during heating inside an oven	The sample self-ignited when the oven temperature reached 150 ± 3^oC

 

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:

150 °C