A silent discharge has been used for sterilization of Escherichia coli
. Silent discharge has advantages such as simple apparatus, less energ
y input, and no temperature rise. Silent discharge with air or oxygen
is most effective for the sterilization. Nitrogen discharge also has s
ignificant effect, however argon discharge has no significant effect.
Sterilization results from injury caused by the discharge current, and
from ozone or nitrogen oxide produced by the discharge.