文档介绍：Advances in Environmental Research 4Ž. 2000 133᎐139
Mechanisms of dinitrogen gas formation in anaerobic
lagoons
U
M. Lloyd Jonesa, Sarah K. Liehra, John J. Classena, , Wayne Robargeb
aDepartment of Biological and Agricultural Engineering, North Carolina State Uni¨ersity, Raleigh, NC 27695, USA
bDepartment of Soil Science, North Carolina State Uni¨ersity, Raleigh, NC 27695, USA
Accepted 7 April 2000
Abstract
Anaerobic lagoons have been widely used to treat agricultural waste and waste from small municipalities for many
years. Oxidation of ammonia is generally assumed to not occur in such lagoons because of their anaerobic
environment. Nitrification, the most likely process that would lead to ammonia oxidation, has not been considered a
significant process in anaerobic lagoons because of the negligible concentrations of dissolved oxygen measured in
these systems. Therefore observed nitrogen losses are usually assumed to be due to ammonia volatilization. However,
in field studies of primary swine waste lagoons in the south-eastern US Coastal Plain, rates of dinitrogenŽ. N2 gas
production have been observed to be much greater than rates of NH3 volatilization. This paper discusses possible
mechanisms that could explain observations of N2 gas generation in anaerobic waste lagoons. Chemical and
microbial reactions have been documented bine ammonia with nitrite, o