The invention relates to a pump device for operating vacuum drainage systems and for pumping sewage, in particular on watercrafts. This pump device comprises a drive device having a drive shaft that comprises a first shaft end and a second shaft end and can be rotated by means of the drive device. The pump device further comprises a centrifugal pump which has at least one impeller that is connected in a torque-proof manner to the drive shaft in the region of the first shaft end.

Marine bypass systems and assemblies. In one embodiment, a bypass system includes a non-marine water supply injection assembly, a bypass solenoid valve, and a non-marine injector. In particular examples, the assembly comprises a heated non-marine water supply injection assembly and a non-heated, non-marine water supply injection assembly. The result is an improved device and method for enhancing the removal, and elimination, of marine growth from a marine vessel.

Marine bypass systems and assemblies. In one embodiment, a bypass system includes a non-marine water supply injection assembly, a bypass solenoid valve, and a non-marine injector. In particular examples, the assembly comprises a heated non-marine water supply injection assembly and a non-heated, non-marine water supply injection assembly. The result is an improved device and method for enhancing the removal, and elimination, of marine growth from a marine vessel.

There is described a fluid treatment system that is particularly well suited for treating ballast water on a shipping vessel. The present fluid treatment system is characterized by having two general modes of operation. A so-called ballasting mode and a so-called deballasting mode. In the ballasting mode, water is pumped from the sea or other body of water in which the shipping vessel is located to a ballast fluid inlet in the present fluid treatment system. Thereafter, it passes through the filter separation and radiation treatment sections in the fluid treatment zone of the fluid treatment system. Next, the fluid exits the fluid outlet of the fluid treatment system and it is pumped to one or more ballast tanks that are located on the shipping vessel. In the deballasting mode, water contained in the ballast tank(s) is pumped to a deballasting fluid inlet of the fluid treatment system after which it is treated in the radiation section onlyi.e., in the deballasting mode, water substantially bypasses the fluid separation section of the fluid treatment system. Next, the treated fluid exits the fluid outlet of the fluid treatment system and is discharged overboard the shipping vessel. A valve system is used to switch between ballasting mode and deballasting mode.

Provided are a novel method and device for treating a liquid that can be utilized for treating ballast water used in ships, etc. The method and device for treating a liquid provided herein allow aquatic organisms contained in a liquid to be sufficiently inactivated or separated by being configured in such a manner as to, in supplying the liquid containing aquatic organisms, carry out at least one of an aquatic organism-inactivating treatment and a physical treatment using a centrifugal force and then store the liquid in a storage means, and in discharging the liquid thus stored, determine whether or not the aquatic organism-inactivating treatment is required, carry out the treatment based on the determination, and carry out the physical treatment using a centrifugal force.

The present invention relates to an apparatus and a method for treating ballast water, and an exemplary embodiment of the present invention provides a ballast water treatment apparatus including: a tank; a spray nozzle which supplies ballast water in the form of droplets into the tank; and a gas circulation unit which supplies inert gas to the spray nozzle, and sucks inert gas that is not dissolved in the ballast water in the tank.

The present invention relates to a system for monitoring quality of ballast water. The system comprises a central data hub comprising a data hub computer adapted for generating a set of acceptance criteria for ballast water quality parameters at one or more geographic positions based upon uploaded ballast water data from on-board computers of at least two vessels. The uploaded ballast water data indicates where, and possibly when, a volume of ballast water was loaded into a ballast water tank of each of the at least two vessels and the respective values of each of the ballast water quality parameters that are measured on each of the volumes of ballast water. The system for monitoring quality of ballast water further comprises at least two vessels, such as ships, each vessel comprising an on-board ballast water system comprises an on-board computer with a monitor, a data logger, a data storage for storage of a set of acceptance criteria for a number of the ballast water quality parameters corresponding to a geographical position and at least one geographical position. The on-board ballast water system further comprises detection means adapted for logging into the data logger the geographical position where the volume of ballast water is loaded into the ballast water tank and a number of ballast water quality sensors each being adapted for measuring at least one of the ballast water quality parameters of the ballast water in the ballast water piping or in ballast water tank. The on-board ballast water system is further adapted for logging ballast water data comprising a value of each of the ballast water quality parameters into the data logger and the on-board computer being further adapted for downloading the set of acceptance criteria from the central data hub and up-loading the ballast water data and the corresponding geographical position to the central data hub. The on-board computer is adapted to perform a comparison of the values of the ballast water quality parameters with corresponding acceptance criteria corresponding to said geographical position, and to display information on the monitor depending on said comparison.

The present disclosure relates to a biocide generating system for inhibiting bio-fouling within a water system of a watercraft. The water system is configured to draw water from a body of water on which the watercraft is supported. The biocide generating system includes an electrode arrangement adapted to be incorporated as part of an electrolytic cell through which the water of the water system flows.

A ballast water treatment operating apparatus includes a ballast water treatment unit for performing a certain treatment of ballast water flowing in from the outside for a ballast operation or performing a certain treatment of ballast water discharged into the outside for a de-ballast operation; a positional information receiving unit for receiving positional information; a control unit for confirming a ship's position by using positional information received from the positional information receiving unit and then determining whether to operate the ballast water treatment unit during a ballast operation or during a de-ballast operation, thereby being capable of preventing an unnecessary energy consumption.

A power supply for a marine water electrolysis system has a control module and at least one power module in communication with the control module. The power module has a first rectifier sub-module and a second rectifier sub-module, where each of the rectifier sub-modules has a current output to an electrolyzer. The power supply has a microcontroller which provides instructions to the at least one power module to provide a specified DC voltage and DC current to the electrolyzer. The sub-modules may be identical, with each sub-module capable of independent operation (at different voltage and current levels). Any number of power modules can be connected in series or in parallel to match the DC voltage and DC current requirements of the electrolyzer. The sub-modules may be stacked in a tower configuration within a rack. Any one or more power modules may be removed from the rack independent of the remaining power modules within the rack without interrupting operation of the electrolyzer.