A Performance Comparison of Anaerobic and an Integrated Anaerobic-Aerobic Biological Reactor System for the Effective Treatment of Textile Wastewater

Table 4

Metabolites produced from the degradation of azo dyes in the treated effluent.

Compound name	Retention time	Structure
2-Nitro-benzonitrile	16.17 minutes
4-(1,1-Dimethylethyl)benzonitrile	17.7 minutes
Azobenzene	17.83 minutes
4-Methyl-3,1-benzoxazepine-2-carbonitrile	18.85 minutes
Guanethidine	19.45 minutes
1-Oxide 1-phenyl-2-(4-methylphenyl)-diazene	20.92 minutes