Nitrous oxide, a potent greenhouse gas and ozone-depleting molecule, continues to accumulate in the atmosphere as a product of anthropogenic activities and land-use change. Nitrogen oxides are intermediates of nitrification and denitrification and are released as terminal products under conditions such as high nitrogen load and low oxygen tension among other factors. The rapid completion and pu...

Benzoyl coenzyme A (benzoyl-CoA) reductase is a central enzyme in the anaerobic degradation of organic carbon, which utilizes a common intermediate (benzoyl-CoA) in the metabolism of many aromatic compounds. The diversity of benzoyl-CoA reductase genes in denitrifying bacterial isolates capable of degrading aromatic compounds and in river and estuarine sediment samples from the Arthur Kill in N...

In combination with activated sludge process and biomembrance process, based on the principle of denitrifying dephosphatation, A2ON processes for biphase sequencing batch reactor biological nutrient removal (BNR) treatment have been developed, with an emphasis on the effects of the ratio of COD to TN (COD/TN) variations on the BNR treatment. Results indicated that the process possessed stable e...

Studies on the process of nitrite reduction by cell-free extracts of denitrifying bacteria could materially contribute to our knowledge of its mechanism. Such investigations have so far been limited to those of Yamagata (1) with Bacillus pyocyaneus (Pseudomonas aeruginosa) and of Robinson et al. (‘2) with Micrococcus haZodenitri$cans. Neither of these authors has examined the products of the re...

Phenol is a man-made as well as a naturally occurring aromatic compound and an important intermediate in the biodegradation of natural and industrial aromatic compounds. Whereas many microorganisms that are capable of aerobic phenol degradation have been isolated, only a few phenol-degrading anaerobic organisms have been described to date. In this study, three novel nitrate-reducing microorgani...