2-Methylnaphthalene was degraded anaerobically by up to 40% by day 260.
Significantly more 2-methylnaphthalene was degraded under sulfate-reducing conditions than under methanogenic conditions.
2-Naphthoic acid was produced during 2-methylnaphthalene degradation.
Pyrene or naphthenic acids were not significantly degraded anaerobically during 260 days.
Firmicutes, Beta- and Deltaproteobacteria were identified during 2-methylnaphthalene degradation.