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.

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.

An assembly (2) comprising at least two elements (10, 24) in a movable arrangement relative to each other for performing a first function of the assembly (2) is furthermore equipped with an anti-biofouling system (30) for subjecting at least an area (11) of the assembly (2) to be at least partially exposed to water during at least a part of its lifetime to an anti-biofouling action as an additional function of the assembly (2), different from the first function of the assembly (2). The anti-biofouling system (30) comprises one or more light sources (32) for emitting anti-biofouling light, and the anti-biofouling system (30) is adapted to realize coverage of the area (11) with the anti-biofouling light on the basis of the movable arrangement of the at least two elements (10, 24) relative to each other for performing the first function of the assembly (2).

A ballast water monitoring device and a method for detecting live phytoplankton are disclosed. The device comprises a chamber for receiving a sample, at least one light source to emit light towards the sample, a light detector to receive light from the sample and generate a light signal, and a controller. The controller is configured to control the at least one light source to emit a single pulse of light, calculate the variable fluorescence [Fv] of the sample in response to the pulse of light, at time intervals less than the duration of the pulse of light, compare the calculated variable fluorescence to a predetermined reference limit, and perform an action if the calculated variable fluorescence is greater than the predetermined reference limit.

A ballast water treatment system for producing treated seawater is described herein that includes: a reaction chamber, wherein the reaction chamber is located within a vessel; an inlet for introducing chlorine dioxide into the reaction chamber, wherein the reaction chamber is equipped with one or more turbulence inducing devices configured for inducing turbulence, wherein the turbulence inducing device is a stationary device; a second inlet for the introduction of seawater, into the reaction chamber; and an outlet from the reaction chamber, wherein the treated seawater is returned to a storage facility within the vessel or is returned to the sea. A method of treating ballast seawater for producing treated seawater is also described that includes: providing a reaction chamber, wherein the reaction chamber is located within a vessel; providing an inlet for introducing chlorine dioxide into the reaction chamber, wherein the reaction chamber is equipped with one or more turbulence inducing devices configured for inducing turbulence, wherein the turbulence inducing device is a stationary device; providing a second inlet for the introduction of seawater, into the reaction chamber; providing an outlet from the reaction chamber; and treating the seawater with chlorine dioxide, wherein the treated seawater is returned to a storage facility within the vessel or is returned to the sea.

An ultraviolet (UV) liquid disinfection system and method are described. The system includes a conduit to carry liquid to be disinfected, the conduit having an inlet to receive the liquid and an outlet to discharge the liquid; a UV source configured to illuminate the liquid within the conduit; a liquid salinity detector to measure a value indicative of the liquid salinity; and a controller coupled to the salinity detector and configured to receive from the liquid salinity detector the measured value and to determine a desired salinity-adjusted UV dose level based on the measured value and predetermined data correlating salinity levels to respective UV dose levels.

According to an embodiment of the present disclosure, there is provided a hydro crusher for water treatment, for removing living organisms from water to be treated, the hydro crusher including: a body portion which has a cylindrical shape having an inner space, and includes an inflow portion to allow the water to be treated to be drawn into the inner space therethrough, and a discharge portion to discharge the water to be treated, drawn in through the inflow portion; and solid particles which are movable by the water to be treated, wherein the movable solid particles are filled in at least a portion of the inner space.

Accordingly, there is an effect that physical sterilization is possible by killing or inactivating living organism included in water to be treated by applying a shock to the living organism.

An application of distilled water, a generation system and a facility utilizing distilled water as ballast water of a vessel, a vessel including the generation system and an operation method thereof are disclosed. The vessel includes a ship body and a generation system which includes a pumping device, a distilled water generator and a ballast water tank. The operation method includes pumping water by the pumping device from a sailing area of the vessel; distillation of the water pumped by the pumping device with the distilled water generator to form distilled water, and supplying the distilled water to the ballast water tank as the ballast water so as to adjust a draft and stability of the ship body. The facility includes a distilled water storage device adapted to store distilled water which could be applied to a ballast water tank of a vessel as ballast water.

A ballast water treatment apparatus 1 comprises a ballast pipe 11 which guides ballast water to a ballast tank 60 and a sterilizing agent supply unit 30 which supplies a constant amount of a sterilizing agent per unit time to the ballast pipe 11 in accordance with a flow rate of ballast water flowing in the ballast pipe 11. A ballast water treatment method using the ballast water treatment apparatus 1 comprises steps of supplying ballast water to a ballast tank 60 via a ballast pipe 11 and supplying a constant amount of a sterilizing agent 33 per unit time to the ballast pipe 11 in accordance with a flow rate of the ballast water flowing in the ballast pipe 11.