I am trying to isolate microorganisms from enriched activated sludge that are able to degrade benzotriazoles. The enriched mixed culture is able to degrade the desired compounds but I failed till now to identify the organism that is responsible for that. Does someone know a good isolation method or a good (solid) enrichment media? I tried R2A, LB, THB, and some other minimal media without any success. Thanks a lot for helping me.