Bbc Brown Boveri Ag

Hans Baumann

Samuel Stucki

Hans-Peter Klein

A process for breaking down organic substances and/or microbes in pretreated feed water for high-purity recirculation systems using ozone which is generated in the anode space (5) of an electrochemical cell (3) and treated with ultraviolet rays and/or with H.sub.2 (8) generated in the cathode space (6) of the same cell (3) or H.sub.2 (20) supplied from outside. The latter is used to reduce elementary oxygen in any form to harmless water. Post treatment via mixed bed (14) and filter (15). Possibility of feeding back water (19) downstream of the receiver (17). No harmful reaction products.

Process for breaking down organic substances and/or microbes in

The feed water for a reverse osmosis device (7) is treated, by means of ozone, by being passed through a mixing vessel (4), in which the charging with ozone is carried out, a direct contact time container (5), and a residual-ozone destruction vessel (6) into the reverse osmosis device (7). At the permeate outlet (9) of the latter, part of the stream is branched off and fed, for charging with ozone, into an electrolysis cell (2) which is provided with a solid electrolyte, and fed back into the mixing vessel (4).

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Staretschwil, Switzerland

Hans Baumann