Anaerobically stabilized sewage sludge has potential to partially substitute synthetic fertilizers. The main risk with the recycling of urban sludge on agricultural soils is the accumulation of unwanted products, such as trace metals and organic micropollutants. In this context, the @entity2555 ( @entity2556 ) are particularly monitored because of their toxic properties at low concentrations and their high resistance to biological degradation. The aim of the present study was to optimize @entity2556 removal during anaerobic digestion of contaminated sewage sludge. Thirteen @entity2556 were monitored in laboratory-scale anaerobic bioreactors under mesophilic (35 degrees C) and thermophilic (55 degrees C) methanogenic conditions. Abiotic losses were statistically significant for the lightest @entity2556 , such as @entity11965 , @entity11966 and @entity10517 . It was shown that @entity2556 removal was due to a specific biological activity. Biological @entity2556 removal was significantly enhanced by an increase of the temperature from 35 degrees C to 55 degrees C, especially for the heaviest @entity2556 . Bioaugmentation experiment was also performed by addition of a @entity2556 -adapted bacterial consortium to a non-acclimated reactor. Significant enhancement of @entity2556 removal was observed. It was finally shown that @entity2556 removal efficiencies and methanogenic performances were closely linked. The rate of biogas production may be used as an indicator of bacterial activity on @entity2556 removal.

Enhancement of XXXX removal during anaerobic treatment of urban sludge.

@entity11965 :: ('MESH:C041509', 'Chemical') :: ['fluorene'] @entity10517 :: ('MESH:C034020', 'Chemical') :: ['anthracene'] @entity2555 :: ('MESH:D011084', 'Chemical') :: ['polycyclic aromatic hydrocarbons'] @entity2556 :: ('CHEBI:33848', 'Chemical') :: ['PAHs', 'PAH'] @entity11966 :: ('MESH:C031181', 'Chemical') :: ['phenanthrene']
@entity2555 :: (MESH:D011084,Chemical) :: ['polycyclic aromatic hydrocarbons']
