Abstract: The process serves for treating water polluted with pollutants which can only be degraded with difficulty by purely biological means. The water is circulated through a reactor vessel arrangement (24) in which it is treated with ozone which causes a preliminary oxidation of the pollutants. The water passes into a vessel arrangement 8 containing an aerobic biological treatment which, owing to the preliminary oxidation of the pollutants, is able to degrade these further. The water is conducted in a main circuit I and a part-circuit II branched off therefrom.

Abstract: A process and an installation for treating liquids, which are charged with pollutants that are difficult to break down, by means of wet oxidation with ozone-containing gas and UV radiation. The installation comprises injectors by means of which ozone-containing gas produced in an ozone generator can be passed into the liquid. The liquid is then introduced into a reaction and degasification vessel, before it passes through the UV irradiation units.

Abstract: Device for the production of ozone from oxidized gases by means of silent electrical discharge in an intermediate chamber through which said gas has passed, which chamber is formed by an annular external electrode and a voltage-conducting internal electrode which is surrounded concentrically by said external electrode. A dielectric is arranged between the internal and the external electrode.In order to increase the degree of efficiency of such a device and, at the same time, to enable utilization of lower voltages, the internal electrode consists of a polygonal bar or polygonal tube having more than four longitudinal edges. The ratio of the diameter of the external electrode to the largest diameter of the internal electrode is not greater than two.

Abstract: A device for producing ozone is characterized by an inner electrode made from a plurality of metal wires. Accordingly, the diameter of the outer electrode is correspondingly reduced. The ratio of the outer diameter electrode to the inner diameter electrode is greater than two.

Abstract: Ozone is produced from oxygen in an ozone generator and is separated from the unconverted oxygen in a pressure swing adsorber. The ozone drawn off from the pressure swing adsorber passes through an equalizing tank at least partially filled with silica gel before it is mixed with a flowing medium.

Abstract: A process for the treatment of water in which at least a partial flow of the water is brought into contact under pressure in a packed column with an ozone-oxygen mixture from an ozonizer with the ozone and a portion of the oxygen being dissolved in the water and the undissolved oxygen being returned to the ozonizer and with the charged water being withdrawn from the column, includes branching off a partial flow from the column water to a water jet-gas compressor in which the ozone-oxygen mixture from the ozonizer is adsorbed and compresed and mixed with the partial flow after which the mixture of water, ozone and oxygen is led into the base of the packed column.

Abstract: The ozone content of ozone-containing gas mixtures is determined in a process wherein the ozone is converted to oxygen and which includes channeling a gas mixture containing nitrogen oxides and possibly water vapor through an adsorbent of aluminosilicate which contains 2 to 20% by weight of aluminum oxide and the aluminosilicate is of spherical shape with a particle diameter of 2 to 5 mm and a specific area of 200 to 650 m.sup.2 /g and an average pore diameter of 5 to 10 nm.