Biodegradation of the energetic compound TNT through a multiple-stage treatment approach.

摘要: Biodegradation of the energetic compound 2,4,6-trinitrotoluene (TNT) and its intermediate 2,4,6-triaminotoluene (TAT) was investigated in this study. From previous investigations, a relationship between biological utilization ethanol as co-substrate for reduction TNT under anaerobic conditions proposed using an fluidized-bed reactor (AFBR). In study, theoretical requirement to TAT further through systematic lowering loading reactor. Near complete observed up critical point, well production methane from limited excess available ethanol. Once deficient were established, increased presence incompletely reduced degradation intermediates, such 2,4-diamino-6-nitrotoluene, even TNT, observed. The cessation methanogenesis confirmed that no available. Degradation effluent two second-stage reactors oxidizing conditions. first aerobic activated sludge reactor, second denitrifying (DenFBR). successful chemical oxygen demand (COD), but removal not accomplished. Because polymerization auto-oxidation conditions, it difficult confirm what extent biological. DenFBR, intermediates successfully degraded, strong evidence existed TAT. This is known report stage