A new bacterial strain capable of chlorobenzene degradation has been isolat
ed from sludge of an industrial wastewater treatment plant. The micro-organ
ism is short, rod-shaped, Gram-negative, yellow-pigmented and has been iden
tified as Escherichia hermanii. It was observed that high chlorobenzene con
centrations (up to 394 mg l(-1)) had low toxic effects towards this strain,
which was able to degrade chlorobenzene without any previous adaptation.