2013.4 - 2014.3 Yearbook of NILIM

Research Summary


Water Quality Control Department
Reference Number Y130104
Title Investigative research on inhibition of nitrous oxide emission in biological treatment process
Start-End Date 2011.4-2014.3
Division Wastewater and Sludge Management Division, Water Quality Control Department
Author Head, Hiromasa YAMASHITA
Senior Researcher, Hiroyuki HIGEMURA
Researcher, Atsuko MICHINAKA
Researcher, Shohei OHNISHI
Researcher, Ryota KAWASUMI
Summary Nitrous oxide (N2O) that has 310 times the greenhouse effect of carbon dioxide, is known to have been emitted from wastewater treatment processes. However, the emission occurrence at actual plants is not understood. We conducted a survey for the state of generation of nitrous oxide at actual plants among different treatment methods to develop new emission factors in Japan, and investigated the treatment methods reducing N2O emission.