The present invention relates to a process for clean sailing of marine ship, comprising steps of: a) scrubbing exhaust gas of engine with seawater to generate scrubbing seawater; b) disposing of the scrubbing seawater in an open loop operation mode, including neutralizing the scrubbing seawater in an open loop operation mode; and/or c) disposing of the scrubbing seawater in a closed loop operation mode, including: i) storing the scrubbing seawater in a storage container; and ii) neutralizing the scrubbing seawater in a closed loop operation mode. The present invention also relates to a ship. The purpose of the present invention is to maintain the unique advantages of economy and environmental protection of marine ships to fulfill the global regulations of the United Nations on ship sulfur limit while safe sailing is ensured.

To provide a ballast water treatment apparatus capable of determining a proper operation mode.

According to the present invention, a ballast water treatment apparatus includes a flow rate adjustment section configured to adjust the treatment flow rate of the flowing ballast water, an ultraviolet reactor capable of adjusting an ultraviolet irradiation amount, a transmittance acquisition section configured to acquire the ultraviolet transmittance of the flowing ballast water, and a control section configured to control the flow rate adjustment section and the ultraviolet reactor in one operation mode selected from multiple operation modes. In each of the multiple operation modes, the treatment flow rate and the ultraviolet irradiation amount are defined for each ultraviolet transmittance. The control section acquires the ultraviolet transmittance from the transmittance acquisition section before the purification treatment, and determines a proper operation mode based on the ultraviolet transmittance as a determination reference.

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 oxidation reduction potential control to regulate the dechlorination of a biocidal agent to allowable discharge levels in ship buoyancy systems and ship cooling water systems.

The present invention discloses a cleaning liquid for a ship ballast water treatment filter, an online cleaning device and an online cleaning method. The online cleaning device comprises a filter cleaning pipeline and a cleaning liquid preparation tank located in the filter cleaning pipeline. The cleaning liquid preparation tank is provided with a cleaning liquid outlet and a cleaning liquid reinjection opening. The filter cleaning pipeline comprises a cleaning liquid injection pipeline located between the cleaning liquid outlet of the cleaning liquid preparation tank and a filter water inlet, and a cleaning liquid reinjection pipeline located between a filter water outlet and a cleaning liquid reinjection opening of the cleaning liquid preparation tank. The cleaning liquid prepared in the cleaning liquid preparation tank is injected into the filter through the cleaning liquid injection pipeline and is re-injected into the cleaning liquid preparation tank through the cleaning liquid reinjection pipeline.

A reactor configured to clean ballast water on ships includes a reactor housing having an inlet and an outlet and a reactor tube in the reactor housing providing a fluid connection between the inlet and the outlet. The reactor tube includes an inner wall having a plurality of rounded recesses extending longitudinally from a first end of the reactor tube to a second end of the reactor tube, and the rounded recesses each have a substantially constant cross section from the first end of the reactor tube to the second end of the reactor tube. A radially inwardly projecting ridge extends between each circumferentially adjacent pair of the rounded recesses.

A filter arrangement includes: a chamber including a chamber inlet for unfiltered liquid, a chamber outlet for filtered liquid and a wall arranged to keep the unfiltered liquid and the filtered liquid separated, a filter element having a longitudinal extension arranged inside of the chamber, wherein the filter element includes a semi-permeable filtration wall including a folded filter arranged in a zig-zag configuration between an inner perforated cylinder and an outer perforated cylinder and an internally located back-washing arrangement. The back-washing arrangement includes: an elongated and hollow body having a longitudinal extension, which is substantially parallel to the longitudinal extension of the filter element, a mechanism configured to drive the body in a rotational and/or an axial movement, a plurality of nozzles arranged in fluid communication with a cavity inside of the body, the plurality of nozzles projecting laterally from the body such that a distal end of each of the plurality of nozzles is arranged in close proximity to the inner perforated cylinder and an outlet arranged in fluid communication with the cavity of the elongated and hollow body and wherein the plurality of nozzles are arranged parallel to each other along a straight line on the body such that they all project in the same direction.

A ballast water treatment apparatus equipped with devices for injecting bromine salt and ozone includes a ballast pipe, a ballast pump, a bromine salt injection part and an ozone processor, wherein the injection part includes a bromine salt storage tank; a bromine salt transfer pipe connected to the ballast pipe for injecting bromine salt supplied from the bromine salt storage tank into the ballast pipe; and a bromine salt injection pump in the transfer pipe for pressurizing bromine salt to be injected into the ballast pipe, and the ozone processor includes an ozone injection device for supplying ozone to the ballast pipe; a mixer in the ballast pipe for mixing ozone supplied from the ozone injection device and seawater transferred into the ballast pipe; and an ozone transfer pipe connected to the mixer of the ballast pipe for injecting ozone supplied from the ozone injection device into the ballast pipe.

An embodiment provides a ballast water treatment system, including: a ballast pump; a backwash pump, wherein an outflow of the backwash pump is mechanically coupled to an outlet of the ballast pump; a treatment unit, wherein the treatment unit is located fluidly between the ballast pump and the backwash pump; wherein the ballast water treatment system has at least two modes, comprising: a ballast mode, wherein, during the ballast mode, the ballast pump pumps water through the ballast treatment system to a ballast tank, and a de-ballast mode, wherein, during the de-ballast mode, the backwash pump conveys backwash water to an outlet of the ballast pump. Other aspects are described and claimed.

A method of sterilizing ballast water contains providing a device in a pressurized cabin of a ship, the device includes: a first sterilization unit, multiple second sterilization units, and a third sterilization unit. The first sterilizer includes a first valve connected with a first pump via at least one first pipe, and the multiple second sterilization units are soaked in ballast water of the pressurized cabin. A method of sterilizing the ballast water contains steps of: S1. feeding seawater into the first valve from an exterior of the ship and pumping the seawater into the first sterilizer via the at least one first pipe; S2. magnetizing, wherein the first sterilizer has multiple magnetization elements so as to destroy cell walls of microorganism and bacteria in the seawater by using a magnetic field of the multiple magnetization elements; and S3. inhibiting a growth of the microorganism and the bacteria.