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Passive grease trap
- 1Galley wastewater enters the trap.
- 2Gravity separates and stores grease.
- 3Residual grease continues downstream.
- 4Build-up increases blockage and downtime risk.
Automatic grease removal at sea
Protect your vessel from galley grease.
Marine Guardian® combines automatic grease skimming with solids screening to protect onboard pipework and wastewater treatment systems from fats, oils, grease and food waste.
How Marine Guardian protects your vessel
Remove grease before it reaches the treatment plant.
Passive grease traps store grease inside the tank until it is removed. That means continual build-up, more pump-outs and a greater risk of blockages or wastewater-system disruption.
Marine Guardian® actively removes free-floating grease at source. Cleaner effluent continues downstream, helping protect pipework, membranes and onboard treatment equipment.
Discuss Your Vessel Marine Guardian®
- 1Galley wastewater enters Marine Guardian®.
- 2Grease is automatically skimmed at source.
- 3Cleaner effluent continues to treatment.
- 4Pipework and membranes receive greater protection.
Built for demanding marine environments
Operational advantages on board.
A compact, automated system designed to reduce routine grease handling while protecting vessel drainage and wastewater infrastructure.
Automatic grease removal
Programmable skimming cycles remove separated grease instead of storing it in the tank.
Solids management
Integrated screening is standard, with Automatic Solids Transfer available on selected configurations.
Retrofit-ready design
Compact, modular options for existing vessels as well as new-build marine projects.
Reduced pump-outs
Less grease storage can reduce pump-out frequency and onboard waste-handling demands.
Treatment-plant protection
Capturing FOG at source helps protect downstream pipework, membranes and treatment equipment.
High-sea configurations
Marine-grade construction with configuration options for demanding onboard operating conditions.
Scalable capacity
At-source and centralised options from approximately 1 l/s through to 20 l/s.
Lower operator demand
Automated recovery cycles reduce routine intervention compared with traditional passive traps.
Designed for your vessel
One approach, multiple marine applications.
Marine Guardian® can be configured around vessel type, galley load, available space, fixture connections and time spent at sea.
Sailing Yachts
Space-efficient options for compact galleys and smaller onboard wastewater loads.
Mega & Superyachts
Scalable, discreet systems for higher galley demand and premium vessel layouts.
Workships
Reliable day-to-day performance for demanding commercial marine operations.
Naval Vessels
Flexible configurations for complex onboard systems and extended deployments.
Ferries & River Boats
Continuous grease control designed around busy passenger-service galleys.
Interactive recommendation tool Size your Marine Guardian® system.
Use the vessel and galley information available to generate an initial AutoSkim recommendation. Our marine team can then check the selection against pipework, peak loading and installation constraints.
- Designed for at-source and centralised applications
- Capacity options from approximately 1 to 20 l/s
- Final specification confirmed by the Marine Guardian team
Initial unit selector
Find your recommended unit
Select the vessel type, then answer the relevant sizing question.
Initial recommendation Request a Marine Quote This selector provides an initial guide only. Final specification must be confirmed by the Marine Guardian® team.
Trusted across the marine sector
Specified by marine operators, builders and partners.
Existing Marine Guardian® relationships and installations across commercial, passenger, naval and yacht applications.
See the system in action
Automatic grease removal for marine applications.
See how Marine Guardian® captures galley grease at source, supports cleaner wastewater and reduces the burden placed on downstream treatment equipment.
Use the Sizing Tool Proven in service
Marine Guardian® case studies.
Explore two different marine installations and the operational challenges addressed by the selected grease-removal systems.
Centralised marine installation
Naval Ships
A centralised approach designed around long deployments, limited discharge opportunities and restricted onboard space.
Read Case Study At-source marine installation
Private Superyacht
A discreet, space-conscious grease-removal solution for a premium vessel and demanding galley environment.
Read Case Study
Marine project enquiry
Get a Marine Guardian® quote.
Tell us about the vessel, galley load and installation. A member of the marine team will review your requirements and contact you.
Tell us about your vessel
Fields marked with an asterisk are required.
Frequently asked questions
Marine Guardian® FAQs.
Practical answers for vessel owners, operators, naval architects and marine engineers.
What makes Marine Guardian different from a traditional grease trap?
A passive trap stores separated grease until it is manually removed. Marine Guardian® uses programmed automatic skimming to recover free-floating grease at source, reducing build-up inside the unit and helping protect downstream pipework and treatment systems.
Is Marine Guardian suitable for retrofit projects?
Yes. Compact and modular configurations can be considered for existing vessels as well as new builds. The final arrangement depends on available space, access, pipework, flow rate and the connected galley equipment.
How much maintenance is required?
Maintenance depends on the selected configuration. On at-source units, the food-solids filter will normally require routine emptying. Models fitted with Automatic Solids Transfer automate more of this process. Periodic inspection and standard servicing are still required.
Does Marine Guardian support maritime compliance?
Marine Guardian® is designed to support compliant handling of galley wastewater and food waste under international maritime pollution-prevention requirements, including relevant MARPOL Annex IV and Annex V considerations. Project-specific compliance should be reviewed with the vessel’s appointed marine and regulatory professionals.
What capacity options are available?
Marine Guardian® systems cover a broad range, from compact at-source units of approximately 1 l/s to centralised marine installations of up to 20 l/s. Use the sizing tool above for an initial recommendation and ask the marine team to verify it.
Can the system integrate with existing galley equipment?
Yes. Depending on the design, Marine Guardian® can receive wastewater from sinks, dishwashers, combi ovens and other appropriate galley drainage points. The connected load and peak flow must be considered during sizing.
Does Marine Guardian support monitoring and automation?
The system uses automated, programmable grease-recovery cycles. Selected models can also support oil-level sensing and optional outputs for integration with suitable vessel-management or monitoring systems.
Is Marine Guardian suitable for naval and high-sea applications?
Yes. Marine configurations can be developed for naval and demanding high-sea applications, including options such as shut-off valves, shock-absorbing mounts and flexible connections where required by the project.
What waste can Marine Guardian handle?
It is designed for fats, oils and grease from galley and food-preparation wastewater, together with associated food particles captured by the solids-screening system. It is not intended as a general-purpose treatment system for unrelated vessel waste streams.
Can I speak directly with the Marine Guardian team?
Yes. Call +44 (0)28 3026 6616, email sales@greaseguardian.com, or use the marine enquiry form above.
