Since the air-diffuser position resulted in the formation of aerobic or anoxic
zone, the performance of nitrogen removal through SND might be compared to the separated reactions of nitrification and denitrification.
There is no detectable Ce anomaly present in any of the scales and measured datapoints, which implies a suboxic or anoxic
bottom and pore waters during the early stages of fossilization.
Evidence for Microbial Fe(III) Reduction in Anoxic
, Mining-impacted Lake Sediments (Lake Coeur D'alene, Idaho).
The early Toarcian oceanic anoxic
event, as defined by both relatively high TOC values and ammonite and nannofossil biostratigraphy, is clearly synchronous across Europe and undoubtedly prove to be so in global context, given its recent investigation in Argentina [12, 26-28].
After initial sampling, the remaining 366 oysters were assigned randomly to either a normoxic (n = 110) or anoxic
(n = 256) treatment.
Believe it or not, juvenile common snook, Centropomus undecimalis, have also adapted to taking oxygen-laden water at the surface in anoxic
1, the biological processes in the anaerobic reactors and in the anoxic
reactor are inter-related with the returned sludge from the secondary sedimentation tank (by the anoxic
reactor) to the inlet of the mixing tank.
Due to the presence of some residual DO, ammonia oxidation was extended even during anoxic
period, but during the latter half of anoxic
period ammonia oxidation was marginal because of dominating activity of facultative anaerobes and shortage of DO.
Popovicova (2008) found anoxic
conditions and increased concentrations of orthophosphate during summer 2006.
In its existing design, the anoxic
oxidation process at the Xianyang Road wastewater treatment plant was unable to meet the new Class 1A Total Nitrogen (TN) discharge standards of 15 mg/l.
It may have become entirely land-locked within Pangea (the only continent there was at the time), leading to its anoxic
conditions, which in turn may have contributed to the mass extinction some 280 million years ago.
This trapped the water and everything in it in an oxygen-free, or anoxic