Conversion of an untreated liquid to a clean harmless treated liquid through microbe removal, characterized in that a mechanical treatment for damaging microbes present in a liquid to thereby effect extinction thereof and sterilization, combined with a chlorination in which a chlorine-containing substance is formed from a liquid and injected into a liquid to thereby effect microbe extinction and sterilization, is applied to a liquid. There is further provided an electrolytic circulation system comprising applying a detoxification treatment for extinction of microbes in seawater and sterilization by means of detoxification facilities on land or on the sea to seawater introduced through a seawater introduction channel and accommodating the seawater having been thus treated in a ballast water tank. As a result, facility and operating costs can be reduced. Extinction of microbes of unlimited size and sterilization can be securely achieved without any strength drop on the side of treated liquid accommodation body. Further, the space for installation of detoxification apparatus for ballast water in ships can be reduced to thereby enable increasing of loading space for cargo, etc. Still further, on existing ships, the hull rework cost for installation of detoxification apparatus can be minimized.

Method of liquid detoxification and apparatus therefor

A ballast water treatment system for treating ballast water for a vessel has a pathway for navigable raw water to the tank and a discharge for discharging water back to the body of navigable raw water. A back washable filter in the pathway receives the raw water and screens sediment from the raw water to produce initially processed water which contains at least some marine organisms. A UV or other biocidal device is connected between the filter and the ballast tank, for disabling or killing the marine organisms in the initially processed water to produce treated ballast water for the main outlet to the ballast tank.

Ballast water treatment system

The invention relates to hydrocyclones for ballast water treatment. The invention further relates to ballast water treatment systems comprising such hydrocyclones and methods of operating such hydrocyclones and ballast water treatment systems.

Treatment of ballast water

The present invention relates to a system for treating ballast water, comprising water inlets and outlets, piping connected to said inlets and outlets, at least one treatment unit connected to said piping, capable of, during operation, treating ballast water flowing through said unit, filter means for said ballast water and valve means for controlling the flow through said piping, treatment unit and filter means. The system is characterised in a control unit arranged and capable of managing and controlling all the different process sequences during start-up, ballasting, deballasting and cleaning as well as all failure functions and situations, whereby contaminated water is prevented from leaving the system. The present invention also relates to a process for treating ballast water, a method for controlling the process and software for performing the method.

System of water treatment

A ballast water treatment device includes a ballast water treatment line, a pump for drawing and pressure feeding treatment target water, a filter, an ultraviolet reactor for irradiating filtrated treatment target water with ultraviolet, a ballast tank for storing treated water having been treated with ultraviolet, and an outboard discharger, and the pump, the filter, the ultraviolet reactor, the ballast tank, and the outboard discharger are provided on the ballast water treatment line. Treatment target water drawn for a predetermined period from start of drawing treatment target water is not caused to pass through the filter and the ultraviolet reactor but is discharged outboard by the outboard discharger, and discharging outboard by the outboard discharger is stopped at elapse of the predetermined period and treated water having been filtrated by the filter and having been treated with ultraviolet by the ultraviolet reactor is poured into the ballast tank.

Ballast water treatment device

Installation for the removal and the deactivation of organisms in the ballast water, with the following characteristic features: a first feed pump for conveying the ballast water, an equipment for gravity precipitation of coarser solids and bigger organisms, connected to the first feed pump, and/or a backwashable filtration equipment, a downstream side connected equipment for the deactivation of micro-germs.

Installation for the removal and the deactivation of organisms in the ballast water

Process for treating waste water on ships in which the waste water is pretreated by surface filtration, the pretreated waste water being collected in a first tank acting as a mixing tank and optionally enriched with oxygen. The waste water from the first tank is continuously fed to a three stage bioreactor, in which aerobic waste water treatment takes place in a second tank, waste water is fed in batches from a second tank to a third sealed tank, in which denitrification and sedimentation of the solids takes place. Water from the third tank is fed into a fourth tank acting as a settling tank with the largest part of the sludge being recirculated in batches from the third tank into the first tank and, after disinfection, the water from the fourth tank is subjected to fine filtration.

Process and assembly for the treatment of waste water on ships

An assembly disinfects and de-activates living organisms in ballast water carried in ships' water ballast tanks The assembly has a water pump (10) linked to a centrifuge for coarse particles and organisms and a back-flush filter (50) The centrifuge surrenders ballast water to an assembly which de-activates micro-organisms The pump (10) is a rotary pump The hydrocyclone stage has one or more units operating in parallel The assembly incorporates a tank (108) holding a charge of biocide agent which is released to the filter (50) output pipe (52) and ballast tanks by a dosing unit The filter has a pore size of 50-300 m The assembly consists essentially of a centrifuge section, a fin-filtration stage and a biocide dosing stage

Apparatus for removing and deactivating organisms present in ballast water

PURPOSE: Provided is a device for removing and deactivating microorganisms in ballast water capable of satisfying safety standard regarding replenishment and discharge of a tank, reducing installation cost and being simply installed to a ship. CONSTITUTION: The device comprises a first supply pump(10) for transferring ballast water, a device for gravity sedimentation of coarse particles and large-sized organic bodies(16.1,16.2,16.3,16.4,16.5,16.6) connected to the first supply pump and a filtering device(50) able to back-wash and a device for deactivating microorganisms (C) connected to the downstream side.

Device for removing and deactivating microorganisms in ballast water

Wastewater is pretreated by surface filtration, collected in container (1) and optionally enriched with oxygen. Wastewater is fed from container (1) to bioreactor and aerobic treatment is carried out. Wastewater is passed to sealed container (3), in which denitrification is performed. Water from container (3) is fed into settling container (4). Sludge from container (3) is recirculated and water is subjected to fine filtration. Wastewater is pretreated by surface filtration. The pretreated wastewater is collected in a container (1) used as a mixing tank and optionally enriched with oxygen. The wastewater is continuously fed from the container (1) to a bioreactor and aerobic wastewater treatment is carried out in a container (2). Wastewater from the container (2) is passed to a sealed container (3), in which denitrification is performed, in batches. Water from the container (3) is fed into a container (4) used as a settling container. The sludge from container (3) is recirculated at regular intervals in batches into container (1). After disinfecting, water is subjected to fine filtration from container (4). An independent claim is included for wastewater treating assembly.

Method and installation for the treatment of soiled water from ships

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