| Abstract: | Five anilines and two hydantoins commonly found in coal conversion wastewaters were evaluated in batch culture, serum bottle tests to determine whether they inhibited phenol- or p-cresoldegrading methanogenic cultures. Working with individual compounds, phenol degradation and subsequent methanogenesis were not affected by 29 mg/l N-methylaniline, 97 mg/l aniline, 300 mg/1 o-methylaniline, 300 mg/1 m-methylaniline or 300 mg/1 p-methylaniline. Neither p-cresol degradation or subsequent methanogenesis was affected by 500 mg/1 hydantoin or 500 mg/l 5,5-dimethylhydantoin. Extended incubation periods showed that none of the three isomers of ring substituted methyl anilines and neither of the two hydantoins were readily degraded to methane. |
