Venteville

Bilge Water Treatment

Bilge Water Treatment

No other waste stream on a ship is as closely linked to million-dollar fines and imprisonment as bilge water (engine room generated wastewater). The term “magic pipe” is well-known among marine engineers, and many have seen them in action because they are still commonly used on ships. We believe that the reason for this isn’t a lack of knowledge or trust, but rather a lack of appropriate tools to handle day-to-day operations. Bilge water isn’t just limited to oil and water; anything brought into the engine room can end up in it. This cocktail contains washing chemicals, rust, sewage leaks, boiler water chemicals, lubrication, and hydraulic oil, foaming liquids, CIP-fluids, grey water leaks, metals, soot, bacteria, dust, and other contaminants. This variation creates a most difficult challenge for marine engineers as conventional static separators are only designed to treat bilge water consisting mostly of marine fuel oil and water.

Bilge Water Treatment – Products

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part no.

CD-0.25

product options

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.

 

Main data:

  • Capacity of treated Bilge Water: Max 250litres/hour
  • Operating temperature of Bilge Water Optimal: +55°C ,Max. +60°C, Min +40°C
  • Operating pressure: 0,25-0,4 MPa(g) / 2,5-4 bar(g)
  • Test pressure: 0,78 MPa(g) / 7,8 bar(g)
  • Safety valve release (Filters, Oil desc, Circ tank): 0,60 MPa(g) / 6 bar(g)
  • IP-class:  IP 54
  • Voltage supply: 3×400-440 Vac, 50-60 Hz
  • Fuse: 10 A
  • Electric Power Consumption: 1,6 kW
  • General Service Air Pressure: 0.6-0.9 MPa(g) 6-9 bar(g)
  • General Service Air Consumption: < 2 normal litres/second
  • Total net weight inc. Filter media (dry): 460 kg
  • Total operating weight: 670 kg
 
part no.

CD-1.0

product options

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.

 

Main data:

  • Capacity of treated Bilge Water: Max 1000litres/hour
  • Operating temperature of Bilge Water Optimal: +55°C ,Max. +60°C, Min +40°C
  • Operating pressure: 0,25-0,4 MPa(g) / 2,5-4 bar(g)
  • Test pressure: 0,78 MPa(g) / 7,8 bar(g)
  • Safety valve release (Filters, Oil desc, Circ tank): 0,60 MPa(g) / 6 bar(g)
  • IP-class:  IP 54
  • Voltage supply: 3×400-440 Vac, 50-60 Hz
  • Fuse: 10 A
  • Electric Power Consumption: 2,3 kW
  • General Service Air Pressure: 0.6-0.9 MPa(g) 6-9 bar(g)
  • General Service Air Consumption: < 5 normal litres/second
  • Total net weight inc. Filter media (dry): 890 kg
  • Total operating weight: 1400 kg
 
part no.

CD-2.0

product options

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.

 

Main data:

  • Capacity of treated Bilge Water: Max 2000litres/hour
  • Operating temperature of Bilge Water Optimal: +55°C ,Max. +60°C, Min +40°C
  • Operating pressure: 0,25-0,4 MPa(g) / 2,5-4 bar(g)
  • Test pressure: 0,78 MPa(g) / 7,8 bar(g)
  • Safety valve release (Filters, Oil desc, Circ tank): 0,60 MPa(g) / 6 bar(g)
  • IP-class:  IP 54
  • Voltage supply: 3×400-440 Vac, 50-60 Hz
  • Fuse: 10 A
  • Electric Power Consumption: 2,56 kW
  • General Service Air Pressure: 0.6-0.9 MPa(g) 6-9 bar(g)
  • General Service Air Consumption: < 9 normal litres/second
  • Total net weight inc. Filter media (dry): 1110 kg
  • Total operating weight: 2010 kg
 
part no.

CD-5.0

product options

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.

 

Main data:

  • Capacity of treated Bilge Water: Max 5000litres/hour
  • Operating temperature of Bilge Water Optimal: +55°C ,Max. +60°C, Min +40°C
  • Operating pressure: 0,25-0,4 MPa(g) / 2,5-4 bar(g)
  • Test pressure: 0,78 MPa(g) / 7,8 bar(g)
  • Safety valve release (Filters, Oil desc, Circ tank): 0,60 MPa(g) / 6 bar(g)
  • IP-class:  IP 54
  • Voltage supply: 3×400-440 Vac, 50-60 Hz
  • Fuse: 10 A
  • Electric Power Consumption: 4,3 kW
  • General Service Air Pressure: 0.6-0.9 MPa(g) 6-9 bar(g)
  • General Service Air Consumption: < 9 normal litres/second
  • Total net weight inc. Filter media (dry): 1900 kg
  • Total operating weight: 3750 kg

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.

 

 

Main data:

  • Max capacity of flow rate: 20000 l/h
  • Max surrounding temperature: 50°C (To be cooled by vent. system)
  • Max water temperature *: 60°C
  • Operating pressure: 0.25 – 0.40 MPa
  • Electric power consumption: 75 W
  • IP-class: IP54
  • Voltage supply: 230 Vac, 50-60 Hz
  • Fuse: 6 A
  • General Service Air Pressure: 0.6-0.9 MPa
  • Flanges: DIN, DN40, PN16
  • Total weight: 105 Kg
  • Size – Lenght,Width, Height: 950 x 350 x 740 mm