Abstract: An ozone generator is proposed which comprises a plurality of plate-like ozone generating elements, stacked one on top of the other, which are in at least partial contact with a process water stream, each of the ozone generating elements having at least one plate-like, electrically insulated inner electrode and at least one likewise plate-like counterelectrode, between which a space is provided for a gas discharge. According to the invention, the ozone generating elements are situated at a distance from one another, perpendicular to their plate-like extension, in such a way that process water is able to flow between the ozone generating elements over substantial surface regions of the plate-like ozone generating elements.

Abstract: An ozone generator is proposed which comprises a plurality of plate-like ozone generating elements, stacked one on top of the other, which are in at least partial contact with a process water stream, each of the ozone generating elements having at least one plate-like, electrically insulated inner electrode and at least one likewise plate-like counterelectrode, between which a space is provided for a gas discharge. According to the invention, the ozone generating elements are situated at a distance from one another, perpendicular to their plate-like extension, in such a way that process water is able to flow between the ozone generating elements over substantial surface regions of the plate-like ozone generating elements.

Abstract: A process for purifying organically polluted water containing organic nutrients for microorganisms, the process including (a) mixing the organically polluted water intensively with ozone in an ozone treatment unit; (b) adding to the water of step (a) at least one compound containing sulfur, which at least one compound containing sulfur is bioavailable for assimilation by at least aerobic microorganisms; and (c) passing the water of step (b) through a filter composed of a plurality of different layers. The process may optionally include treating the water after step (c) with ozone in an ozone water treatment unit in order to oxidize residual bioavailable sulfur. The at least one compound containing sulfur is preferably added in an amount which is effective to at least eliminate sulfur deficiency of the aerobic microorganisms and promote growth of a biofilm in the filter thereby contributing to biological mineralization of the organic nutrients.

Abstract: Method of processing water including bath water and water employed in air treatment plants, which is conveyed in a circuit containing a contaminating point and a processing plant, the water exiting the contaminating point being contaminated water having a redox potential which is measurable and the method including, in the order recited, continuously measuring the redox potential of the contaminated water at the inlet of the processing plant; introducing into the contaminated water an auxiliary processing agent which is a mixture including a flocculating agent which promotes deposition of corpuscular pollutants and a halide which reduces ozone and disinfects the contaminated water as a function of the redox potential in such a way that the auxiliary processing agent is introduced in proportion to a drop in the redox potential; treating the water with ozone from an ozone generator in a spatial region defined within the processing plant and forming flocks including the corpuscular pollutants; and filtering the

Abstract: In an ozone generator composed of a plurality of plate-shaped high-voltage electrodes and a plate of insulating dielectric material assembled in a stack, the electrodes including at least one externally coolable electrode and at least one counter-electrode, with the plate of insulating material being disposed between the externally coolable electrode, so as to bear thereagainst, and the counter-electrode, while being spaced from the counter-electrode to form a discharge space, a layer of viscous material is interposed between, and contacts the externally coolable electrode and the plate.

Abstract: A water treatment system having an apparatus (2) for the intensive pretreatment of the untreated water with ozone, having a downstream filter (3) with reducing action, and also having an apparatus (4) for the post-disinfection is improved in that the excess ozone which accumulates in the upper part (17) of the filter tank and which is added to the water during the pretreatment is removed anhydrously and fed into the apparatus for the post-treatment of the filtered water. The post-treatment takes place preferably in a retention vessel (4) filled with packing material (15) in which the water comes into contact with ozone by surface contact. The water level (24) is kept constant by regulating the gas discharge from the retention vessel (4). (Illustrated by drawing).

Abstract: A 5/2-way commutating valve, particularly for reverse-flush filters in water treatment plants, consists of a tubular housing with five radial pipe connections (6, 9, 10, 11, 12), between which a valve seat (24 to 27) is present in each case. Preferably spherical valve elements (28 to 30) are arranged on a central rod (23) stressed in one direction by a spring arrangement (32), a double-sided value element (29) cooperating with the two central valve seats (25, 26) being slidable longitudinally relative to the central rod (23). The housing is composed of a plurality of mutually rotatable housing parts (16 to 20) each exhibiting a pipe connection. A flow throttle (51, 23) installed between the spigots (9 and 12) in the housing serves to adjust the flow velocity during reverse flushing. A compressed air piston, which is connectable to the compressor of a ozone generator, may be provided to actuate the central rod (23) counter to the spring arrangement (32).

Abstract: An air desiccating apparatus (13) consists of a tank (1') which is filled with a hygroscopic desiccator substance and thermally insulated relative to its surroundings and exhibits a heater element (8'), by means whereof the desiccator substance can be regenerated by heating and evaporation. To permit such an apparatus (13) to be used also in warm rooms (25.degree. C. for example) and at very high air humidity, measures are adopted for cooling the desiccator substance with ambient air during the desiccation process. Particularly if the thermal insulation of the tank (1') results from the fact that it is surrounded by a condenser bell (15) and the latter in turn by a housing (17), whereby the steam produced during regeneration can be condensed, it is proposed that the tank (1') be penetrated by cooling pipes (3'). A fan (21) forces cooling air upwards through the latter and positively down again between the external surface of the tank and the condenser bell (15).

Abstract: An ozone water purifying apparatus consists of a tank (1) and of a treatment unit (3) fastened to the interior of the cover (2) of the tank (1) exhibiting a feed orifice (14) and a return orifice (11) and preferably a filter sand bed (13). With the aim of achieving a more compact mode of construction and to facilitate the access to the lower part of the tank interior, the feed orifice (14) is fitted on the side wall of the tank (1) and connectable to the inlet pipe (7) of the treatment unit (3) by means of a removable intermediate piece (15,16,17). The intermediate piece is a closed pot (15), which is plugged over the feed pipe connection by a horizontal pipe section (16) and is fastened by means of two support arms placed on vertical studs (26).

Abstract: In a high-voltager transformer including a closed casing, a magnetic core with at least one winding, a cooling liquid filling the casing and surrounding the winding, and insulated casing lead-throughs for connecting external lines to the winding, a compensating device forms part of the casing and is exposed to the cooling liquid for permitting expansion of the cooling liquid on being heated, and the cooling liquid is subjected to a pressure greater than that of the ambient air at all operating temperatures of the transformer.

Abstract: In an ozone generator composed of a plurality of circular, plate-shaped high-voltage electrodes arranged in a stack, the electrodes including at least two solid electrodes which are spaced from one another and a counter-electrode, the generator further being composed of two circular plates of insulating material disposed in the stack between the two solid electrodes, with the counter-electrode being disposed between, and spaced from, the two plates to form therewith two discharge spaces, and with the outer diameter of the counter-electrodes being less than that of the plates, and a ring clamped and squeezed between the plates in the vicinity of their peripheries, the ring is of a gasket material which is initially resilient, and which is formed to have, at each side directed toward a respective plate, at least two beads projecting in the axial direction of the plates and spaced apart in the radial direction of the plates, and the plates are rigidly supported against the two solid electrodes.

Abstract: An air washing apparatus consisting essentially of two separate cyclic units. In the first cyclic unit, air is sprayed with a fluid consisting of water and a halogen. The spray removes impurities from the air, and brings the impurities into the fluid supply from which the impurities are removed in the second cyclic unit, by treating the fluid with ozone. After treatment, the fluid is returned to the fluid supply where the halogen in the fluid supply removes any ozone present, and thereby renders the fluid safe.

Abstract: A bath water treating system in which even higly resistant germs may be destroyed by treating the bath water with ozone and a halogen compound such as bromine or hydrobromic acid to establish a redox potential in excess of 600 mV. The bath water is recycled through a quartz type filter loaded with a composite filtering medium. The filtering medium comprises two superposed layers, a lower layer consisting of a mixture of filter gravel and mineralized charcoal, and an upper layer of activated charcoal. A halogen or halogen compound is adsorbed in the charcoal layer. An ozone generator is mounted within the filter housing. The bath-tub assembly comprises a cabinet in which are mounted a bath-tub, a filtering and degerminating unit and the respective accessories and controls. The ozonizer is removably mounted within the filter housing and includes a mixing chamber and check valves.

Abstract: A bath water treating system in which even highly resistant germs may be destroyed by treating the bath water with ozone and a halogen compound such as bromine or hydrobromic acid to establish a redox potential in excess of 600 mV. The bath water is recycled through a quartz type filter loaded with a composite filtering medium. The filtering medium comprises two superposed layers, a lower layer consisting of a mixture of filter gravel and mineralized charcoal, and an upper layer of activated charcoal. A halogen or halogen compound is absorbed in the charcoal layer. An ozone generator is mounted within the filter housing. The bath-tub assembly comprises a cabinet in which are mounted a bath-tub, a filtering and degerminating unit and the respective accessories and controls. The ozonizer is removably mounted within the filter housing and includes a mixing chamber and check valves.