Nitrates escaping from agricultural soil, discharges from sewage treatment plants, emissions from power plants and automobiles, the activity of nitrifying and denitrifying bacteria
, the loss of wetlands, and the contribution from septic tanks, well fertilized lawns, and golf courses all had to be examined as part of an integrated socio-natural system.
However, the number of denitrifying bacteria
was not enhanced in our study, probably because any anaerobic conditions caused by agricultural machinery traffic were not sufficient to stimulate those bacteria.
Autotrophic, hydrogen-oxidizing, denitrifying bacteria
in groundwater, potential agents for bioremediation of nitrate contamination.
Our results indicate that in Antarctic soils, fertilisation stimulates denitrifying bacteria
to degrade hydrocarbons in the anoxic portion of the soil profile,' Dr Powell said.
Procedures Used for Measurements of Microbial Abundance and Biomass--Soils were analyzed for total microbial biomass and denitrifying bacteria
populations one day prior to flooding and on the last day of incubation.
These are the same soil samples from which denitrifying bacteria
described in Cavigelli (1998) were isolated.
Many kinds of denitrifying bacteria
have been isolated from the human oral cavity, upper respiratory tract, and alimentary tract (e.
sup+] oxidation was the major source of nitrate for denitrification under our ambient conditions (1), denitrifying bacteria
were able to take advantage of higher nitrate concentrations.
In any case, as we have seen, natural sources of sulfuric and nitric acid tend to be either episodic (huge volcanic eruptions and forest fires) or unlikely to concentrate the acid regionally (marine algae, denitrifying bacteria
, and lightning).
There is also some interesting work to be done on enzyme systems as found in denitrifying bacteria
and some fungi, where rate of reaction and bond targeting are very precise.
The scientists developed novel polymer carrier beads that are loaded with denitrifying bacteria
to create bio-filters for the removal of nitrates from water.
Contract award: delivery of preparation constituting an additional carbon source for denitrifying bacteria
supporting the process of biological nitrogen removal.