The streamer discharges are effectively used for biological and chemical cl
eaning of air and water. Uniform streamer discharges were obtained in water
at pulsed electric loading. The volume of these discharges exceeds 400 cm(
3) and the energy delivered to the discharge reached 40-400 J depending on
the applied voltage. The reliable and durable reactor for water treatment b
y pulsed streamer discharges is designed and tested. High voltage pulse amp
litude applied to the reactor requires improved electric insulation to prev
ent flashover along the reactor surface both in water and air. High mechani
cal stress due to high discharge current adds the requirements to the mecha
nical durability of the system. A small-size reactor with the volume of app
roximately 1 l withstands successfully both high electrical and mechanical
stresses. The reactor is designed for research purposes, however it can be
upgraded to use in a high repetition-rate regime necessary for industrial a
pplications. (C) 1999 American Institute of Physics. [S0034-6748(99)00608-5
].