Abstract: The inventive ozone generator comprises at least one tubular external electrode (4), at least one internal electrode (7), wherein each internal electrode consists of a plurality of tubular metal segments (8) which are closed at least partially at each end and externally ceramic-coated, said tubular segments are disposed one behind another, mechanically de-coupled from each other and electrically connected, a rod (11) axially crosses the tubular segments (8) and is provided on the end thereof with means (12, 13) for axially clamping the tubular segments to each other in such a way that an electric contact is formed. Each tubular metal segment (8) is provided at each end thereof with an outwardly convex bottom (8a, 8b) which is embodied substantially in the form of a spherical cap, comprises a central area (18) for electric contact and is provided with a ceramic coating (9) consisting of at least two thin layers (9a, 9b).

Abstract: The inventive ozone generator comprises at least one tubular external electrode (4), at least one internal electrode (7), wherein each internal electrode consists of a plurality of tubular metal segments (8) which are closed at least partially at each end and externally ceramic-coated, said tubular segments are disposed one behind another, mechanically de-coupled from each other and electrically connected, a rod (11) axially crosses the tubular segments (8) and is provided on the end thereof with means (12, 13) for axially clamping the tubular segments to each other in such a way that an electric contact is formed. Each tubular metal segment (8) is provided at each end thereof with an outwardly convex bottom (8a, 8b) which is embodied substantially in the form of a spherical cap, comprises a central area (18) for electric contact and is provided with a ceramic coating (9) consisting of at least two thin layers (9a, 9b).

Abstract: Process for recovering and reusing effluent gas from an ozonization reactor in a plant for treating effluent, especially sewage, which includes a biological reactor, a clarifier and an ozonization reactor. The effluent gas from the ozonization reactor is brought, as a cocurrent, into contact with a stream of water containing compounds that can be oxidized by the ozone, so that the residual ozone is removed and efficiently consumed. The effluent gas thus stripped of the residual ozone is then, optionally, pressurized using a fluid taken from the plant so as to produce a gas/liquid mixture. The gas liquid mixture is converted into an emulsion of fine bubbles, and the emulsion is introduced into the biological reactor, preferably near the bottom of the latter.

Abstract: A flow control apparatus for enriching gas containing oxygen with ozone includes a generator for producing the enriched mixture. A flow meter is connected to the generator outlet to measure the flow of the generated enriched gas. A mass flow control device is connected downstream of the flow meter. A flow control comparator compares a flow value as obtained from the measuring means and a preset constant value. A signal output of the flow control comparator is connected to a signal input of the mass flow control device for varying the mass flow in accordance with the comparison. An outlet of the mass flow control device is connected to an inlet of a compressor for compressing gas, the inlet gas pressure varying to keep compressed gas at a constant pressure. Feedback is provided between an outlet and an inlet of the compressor. A second mass control device is intermediately connected along the feedback connection for adjusting the mass flow of gas passing through the feedback means.

Abstract: A method for the generation of a supply of ozone containing process gas exhibiting high effective ozone content basically involves the steps of (a) providing a stream of an oxygen containing feed gas having a temperature not greater than about 50.degree. C. and an absolute pressure between about 1 and 3 bar, (b) subjecting the stream of feed gas to an electric discharge that transforms some of its oxygen content into ozone to produce a stream of ozone containing gas, and (c) compressing the ozone containing gas with simultaneous cooling thereof to produce a stream of ozone containing process gas having a temperature not greater than about the temperature of the feed gas, an absolute pressure greater than 3 bar and an absolute ozone partial pressure of at least 0.2 bar. Various systems for carrying out such methods are disclosed.

Abstract: A current source inverter power supply for an ozone generator which results in improved efficiency and reliability in operation of such generators has an AC/DC converter coupled through a large inductance to a DC/AC inverter that, in turn, is coupled at its output to the primary of a high voltage transformer. Such transformer has an air gap in its core to supply the electrical characteristics necessary for resonance with the load which is capacitive in nature. Thyristors in the inverter are naturally commutated so the switching frequency is close to, but slightly above, the natural resonant frequency of the inverter/transformer/ozone generator circuit.