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Environmental fate & pathways

Biodegradation in water and sediment: simulation tests

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Description of key information

Ethyl centralite was investigated as to susceptibility to microbial degradation and/or biotransformation under both aerobic and anaerobic conditions in both static (batch) and continuous culture systems.

Key value for chemical safety assessment

Additional information

Ethyl centralite was reduced under aerobic conditions in static culture to approximately 35% of initial concentration after 5 days. N-ethylaniline and Ethylphenylurea were identified as transformation products. However the substance appeared to be quite stable to anaerobic degradation in static culture.

This study has demonstrated that, in the presence of a rich nutrient medium, the compound Centralite (diethyldiphenylurea) is biotransformed. These results suggest that the compound may be successfully removed in a continuous treatment process operated in both aerobic and anaerobic modes. High nitrate concentrations are reduced to acceptable levels. Although increasing the concentrations of nutrients or carbon source supplements increased the disappearance of a compound it is hoped that suitable adjustments in operating parameters of a continuous system would make it possible to drive the disappearance to completion.