A Dielectric Barrier Discharge system controller for controlling a fluid treatment by a Dielectric Barrier Discharge system is provided. Therein, the strength of an effect caused by a discharge created by the Dielectric Barrier Discharge system is monitored, and the generation of high-voltage pulses by the high-voltage pulse generator is controlled. The controlling of the generation of the high-voltage pulses is adapted based on the received sensor data.

The present invention relates to an apparatus for reducing greenhouse gas emission in a vessel cooperated with exhaust gas recirculation (EGR), and a vessel including the same, in which NO.sub.x generation is reduced, which is the original purpose of EGR, while maintaining existing EGR, SO.sub.x as well as CO.sub.2, which is the representative greenhouse gas, are absorbed and converted into materials that do not affect environments, and the materials are discharged or stored as useful materials, thereby preventing corrosion of an engine and improving combustion efficiency.

The present disclosure relates to a biocide-generating device for outputting a biocide to a water system. The biocide-generating device includes a housing having a water inlet for receiving water from the water system and a water outlet for outputting water containing biocide to the water system. The biocide-generating device also includes an electrode arrangement having first and second electrodes positioned in the housing for generating biocide in the water within the housing, and an electrical power circuit for establishing a flow of electrical current between first and second electrodes of the electrode arrangement for generating the biocide in the water within the first chamber electrolytic cell. A control system of the biocide-generating device has operational features adapted to inhibit scaling to the electrode arrangement.

A system and a method are for heat treatment of water of a vessel outside a fixed installation of the vessel. The water includes ballast water of the vessel and/or waste water from hull cleaning of the vessel. The system includes a system inlet; a system outlet; a heat application section; and a heat treatment piping system. A heat recovering section includes two parts for exchanging heat. The heat treatment piping system couples the system inlet to the system outlet via: one of the parts of the heat recovering section, the heat application section and the other part of the heat recovering section. The system does not form part of a fixed installation of the vessel.

A water treatment device including a first hydrocyclone and a biocidal fluid injector is described. The first hydrocyclone has an internal space, a water inlet for supplying water into the internal space, a base outlet for discharging at least a part of the water, and an apex outlet. The biocidal fluid injector is configured to inject a biocidal fluid into the internal space for eliminating organisms present in the water. The biocidal fluid injector is positioned such that a pressure within the injected biocidal fluid is lower than a head pressure of the first hydrocyclone.

A marine water treatment dock box system is provided. The marine water treatment dock box system securely houses a water softener, a deionizer, a high-pressure washer and a selective control system for diverting water for cleaning a docked vessel, for onboard use by the vessel, and/or for high-quality potable water production. The above-mentioned components are operatively associated to outlets disposed along the exterior of the dock box body, maintaining the security and protection of the components. The water softener may be fluidly connected to an inlet to the dock box and a three-way valve for selectively controlling the softened water to one of the following: (1) a high-pressure pump for washing a vessel; (2) to the deionizing tanks for dissolving solids for a spot-free rinse; and or (3) to an outlet to fill onboard fresh water tanks.

A pulse generator and a method for generating pulses are provided. The pulse generator includes at least one first transmission line with a first and a second end; at least one second transmission line with a first and a second end; a voltage source; a switching unit; and a charge control device. The charge control device is adapted to connect an output of the voltage source to the first end of the at least one first transmission line. A first switch Si in the switching unit is adapted to connect or disconnect the second end of the at least one first transmission line to the first end of the at least one second transmission line for predetermined time spans. A second switch S2 in the switching unit is adapted to connect or disconnect the first end of the at least one second transmission line to a fixed potential. The opening or closing states of Si and S2 in the switching unit are mutually exclusive. A second end of the at least one second transmission line is adapted to be connected to a load. The switching unit is further adapted to operate the first switch, S1, and the second switch, S2, in a predetermined order to alter a pre-charging state of the first transmission line.

A method for treating wastewater involves electrolyzing a stream of seawater and wastewater mix within one or more electrolytic cells mounted outside a batch tank. The electrolyzed stream is piped to a quelling chamber which is mounted above the batch tank. A diluted polymer solution is injected at upstream of an in-line mixer piping into the quelling chamber substantially concurrently with the electrolyzed stream. The polymer solution and the electrolyzed stream are dispersed as a fine shower over residual seawater and wastewater in the batch tank. The polymer solution facilitates flocculation of the suspended solid particles and creates a distinct buoyant layer of flocculated solid particles attached with micro bubbles. A substantially clarified effluent is separated from the flocculated layer and neutralized prior to discharge. The flocculated layer is pumped from the batch tank to a dewatering system where entrained solids are compacted to a desired level. A centrate generated during the solids/sludge dewatering step is recirculated to the batch tank prior to addition of seawater during a subsequent treatment cycle as a supplement to the seawater.

Techniques and systems for neutralizing discharge waters from ballast and/or cooling water biocidal treatment and disinfection systems are provided. The systems utilize, inter alia, oxidation reduction potential control to regulate the dechlorination of an electrocatalytically generated biocidal agent to allowable discharge levels in ship buoyancy systems and ship cooling water systems

Techniques and systems for neutralizing discharge waters from ballast and/or cooling water biocidal treatment and disinfection systems are provided. The systems utilize, inter alia, oxidation reduction potential control to regulate the dechlorination of an electrocatalytically generated biocidal agent to allowable discharge levels in ship buoyancy systems and ship cooling water systems