More stringent emissions regulations usually add more equipment onboard. However, the amount of equipment that can be added to the engine room and the amount of time that the crew has remaining for new operations are both limited.

Combining treatment units for different waste streams is one way to overcome this challenge, and even though a combined system for bilge, black and grey water is technically possible, there are too few common denominators for effluent water parameters. For separate waste streams with identical effluent discharge requirements, it is a whole new ballgame.

The oil content (below 15 ppm) is the only regulated parameter for discharge of either MEPC.307(73) regulated EGR bleed off water mor MEPC.107(49) regulated bilge water. It therefore made perfect sense to develop a treatment system that can treat both.

The Marinfloc, class approved, combined EGR bleed off water and bilge water treatment system is the first solution ever to treat waste streams belonging to various Marpol annexes. By integrating the WhiteBox® and segregation valves, the requirement not to mix Marpol  ANNEX I and VI waste and recording of discharge data in the oil record book and the EGR record book, are fulfilled.

A combined treatment system for EGR bleed-off water and bilge water is a convenient installation to minimize the cost of both equipment and installation related to the discharge of bilge water and EGR bleed-off water. Bilge water and EGR bleed-off water belong to different Marpol annexes and must hence be kept segregated, and there must be separate holding tanks and sludge tanks. The system segregation valves prohibit mixing of the two, including the generated sludge from the treatment process. The class approved automated switch-over sequence with interlocks is controlled by the system automation. From the control panel, the operator can easily select which waste stream to treat. The WhiteBox® will control and record the system vital discharge parameters and segregate the amount of discharged bilge water and EGR bleed-off water for separate record keeping as required.

Process description: The CD-unit can take suction from either the EGR bleed-off tank or the Bilge water holding tank. Three three-way valves connected to a selector switch secure that the waste streams are never mixed. The EGR bleed-off water is collected in a bleed-off water drain tank of a cascade type. The tank should be equipped with heating coils to heat the bleed-off water to 40-55 °C, solid sensors that will detect solidification of soot. The system must have segregated sludge tanks as per the Marpol requirements. The wastewater is treated overboard through a WhiteBox® by the CD unit and all vital system data such as tank levels, valve positions, oil content, discharged volume etc. is recorded and logged in the WhiteBox® recorder.

Contact us for more information.

OPTION 2 – OMD Exchange System

1. A reconditioned calibrated OMD cell will send from stock and a credit will be issued upon receiving your OMD cell
2. Your old OMD cell shall be returned to us within 60 days from issued invoice.

How to order

Download the pdf file to open the order form, select your options and send the form to info@venteville.com

The CD unit is a dissolved air flotation and flocculation unit that treats bilge water to below 5 ppm. The technology enables treatment of bilge water of various composition as the operator can adjust the dosage to the current conditions at hand. It was developed onboard ships not simply to fulfil the MARPOL requirements but to meet onboard conditions.

Key benefits

• Flocculation technology: no cartridge filters nor centrifuges required
• Adjustable to the ship’s specific bilge water composition
• 5 ppm type approved
• Low energy consumption for low carbon footprints
• Can be integrated with the Whitebox®
• Low operational cost

The treatment process

The process can be divided in five stages: Oil separation, Aeration, Flocculation, Flotation and Filtration.

1. Oil separation. Free oil floats on water and is separated in the oil descaler by gravity to the sludge tank.
2. Aeration. Air is dissolved in the water under pressure.
3. Flocculation. Flocculation chemicals are added and coagulate emulsions, chemicals, and particles to flocs.
4. Flotation. The dissolved waste from the aeration process is released into the flocs that are lifted to the top of the flotation tank and removed to the sludge tank.
5. Filtration. The clean water from the flocculation process is filtered to 0-5 ppm before being discharged overboard.

Max capacity 0.25m³ per hour.

The CD unit is a dissolved air flotation and flocculation unit that treats bilge water to below 5 ppm. The technology enables treatment of bilge water of various composition as the operator can adjust the dosage to the current conditions at hand. It was developed onboard ships not simply to fulfil the MARPOL requirements but to meet onboard conditions.

Key benefits

• Flocculation technology: no cartridge filters nor centrifuges required
• Adjustable to the ship’s specific bilge water composition
• 5 ppm type approved
• Low energy consumption for low carbon footprints
• Can be integrated with the Whitebox®
• Low operational cost

The treatment process

The process can be divided in five stages: Oil separation, Aeration, Flocculation, Flotation and Filtration.

1. Oil separation. Free oil floats on water and is separated in the oil descaler by gravity to the sludge tank.
2. Aeration. Air is dissolved in the water under pressure.
3. Flocculation. Flocculation chemicals are added and coagulate emulsions, chemicals, and particles to flocs.
4. Flotation. The dissolved waste from the aeration process is released into the flocs that are lifted to the top of the flotation tank and removed to the sludge tank.
5. Filtration. The clean water from the flocculation process is filtered to 0-5 ppm before being discharged overboard.

Max capacity 1m³ per hour.

The CD unit is a dissolved air flotation and flocculation unit that treats bilge water to below 5 ppm. The technology enables treatment of bilge water of various composition as the operator can adjust the dosage to the current conditions at hand. It was developed onboard ships not simply to fulfil the MARPOL requirements but to meet onboard conditions.

Key benefits

• Flocculation technology: no cartridge filters nor centrifuges required
• Adjustable to the ship’s specific bilge water composition
• 5 ppm type approved
• Low energy consumption for low carbon footprints
• Can be integrated with the Whitebox®
• Low operational cost

The treatment process

The process can be divided in five stages: Oil separation, Aeration, Flocculation, Flotation and Filtration.

1. Oil separation. Free oil floats on water and is separated in the oil descaler by gravity to the sludge tank.
2. Aeration. Air is dissolved in the water under pressure.
3. Flocculation. Flocculation chemicals are added and coagulate emulsions, chemicals, and particles to flocs.
4. Flotation. The dissolved waste from the aeration process is released into the flocs that are lifted to the top of the flotation tank and removed to the sludge tank.
5. Filtration. The clean water from the flocculation process is filtered to 0-5 ppm before being discharged overboard.

Max capacity 2m³ per hour.

The CD unit is a dissolved air flotation and flocculation unit that treats bilge water to below 5 ppm. The technology enables treatment of bilge water of various composition as the operator can adjust the dosage to the current conditions at hand. It was developed onboard ships not simply to fulfil the MARPOL requirements but to meet onboard conditions.

Key benefits

• Flocculation technology: no cartridge filters nor centrifuges required
• Adjustable to the ship’s specific bilge water composition
• 5 ppm type approved
• Low energy consumption for low carbon footprints
• Can be integrated with the Whitebox®
• Low operational cost

The treatment process

The process can be divided in five stages: Oil separation, Aeration, Flocculation, Flotation and Filtration.

1. Oil separation. Free oil floats on water and is separated in the oil descaler by gravity to the sludge tank.
2. Aeration. Air is dissolved in the water under pressure.
3. Flocculation. Flocculation chemicals are added and coagulate emulsions, chemicals, and particles to flocs.
4. Flotation. The dissolved waste from the aeration process is released into the flocs that are lifted to the top of the flotation tank and removed to the sludge tank.
5. Filtration. The clean water from the flocculation process is filtered to 0-5 ppm before being discharged overboard.

Max capacity 5m³ per hour.

The Marinfloc Whitebox® is a failsafe overboard discharge monitoring and control unit. It is installed between the Oily Water Separator (OWS) and the overboard valve. It prevents non-compliant discharge of bilge water and helps to protect the crew from accusations as it presents the evidence of the vessels activities regarding discharge. Apart from logging it also helps prevent illegal discharge from occurring.
All vital discharge data is recorded and linked to the vessel’s GPS; the Whitebox® houses all necessary monitoring and control equipment for the overboard discharge. A digital recorder stores all critical data such as oil content, valve settings, flow via the oil content monitor and overboard flow, door open/closed, vessel position, and time.

The Whitebox can also monitor sewage overboard pump or STP running if connected.The data is stored in a secure digital format in the recorder and the history can be presented on the display or on a separate computer. That enables the crew to present the discharge data to USCG, Vetting, Class or port state and can prove that the operations have been compliant. The data is so detailed that extensive analysis can be made for preventive and performance reports.

The OCEAN GUARDIAN® can be connected to the Whitebox that can close the three way valve in the Whitebox when the vessel passes the 12 nautical mile line anywhere in the world. The Whitebox can also be used to monitor the discharge from the clean drains such as drains from the AC system or air cooler drains from the main engine. This type of water is generally very clean and could be pumped directly overboard which is approved by most classification societies. However as it may contain oil we recommend to discharge it through the Whitebox and if oil is present it will be directed to the bilge water tank for treatment by the OWS. This will greatly reduce the daily bilge water yield and the operation time and running costs of the OWS.