Grease Separator

Fats, Oils, and Grease (FOG). When cooled, this FOG solidifies in sewer pipes, causing blockages, foul odors, and sewage backups. Grease Trap Systems (Fat Interceptors) are mandatory equipment designed to separate these pollutants from wastewater using the fundamental principle of gravity, safely storing them before discharge into the municipal sewer system. Yongrad manufactures leak-proof and easy-to-clean Polypropylene (PP) and HDPE grease traps, suitable for above and below-ground installation, ensuring your facility maintains full compliance with municipal and environmental regulations.

What is a Grease Trap and Its Importance in Industrial Wastewater?

A grease trap is a passive separation unit designed to hold FOG-laden wastewater for a specified period, allowing the grease and oils to rise to the water surface through the principle of density difference.

Industrial and Commercial Importance:

• Preventing Blockages: They prevent the solidification of oil and grease in sewer lines, eliminating the risk of major blockages in both internal facility pipes and the public sewage network.
• Municipal Compliance Obligation: Many municipalities and water authorities limit the amount of grease discharged from commercial kitchens via strict regulations. The use of a grease trap is a legal requirement.
• Odor Control and Hygiene: They prevent the release of foul-smelling gases produced by the breakdown of fat and grease, supporting hygiene and sanitation in food handling areas.

Working Principle and Functional Structure of Grease Trap Systems?

Grease trap systems rely entirely on the physical separation principle of gravity. Their structure is designed to reduce the velocity of the wastewater as it passes through:

• 1. Slow Flow: When wastewater enters the system, the flow velocity suddenly drops due to the tank’s volume.
• 2. Baffle Plates: Baffle plates installed inside the tank extend the water’s flow path and prevent turbulence, maximizing the retention time required for FOG to rise to the surface.
• 3. Separation: The low-density oil and grease rise toward the surface, accumulating in the top layer. Denser solid food particles settle at the bottom.
• 4. Discharge: The cleaned stream, consisting solely of water, exits from beneath the oil layer and is directed to the sewer.

Grease Trap Selection Criteria and Yongrad Expertise

Accurate capacity calculation and material selection are critical for a grease trap to operate correctly and comply with legal limits.

• Capacity and Sizing: Grease traps are sized based on the wastewater flow rate in cubic meters per hour, or sometimes based on the number of sinks/dishwashers in the kitchen. An undersized interceptor will discharge FOG without proper separation. Yongrad guarantees a volume calculated according to the nominal flow rate required by your facility.
• Material Superiority (PP/HDPE): Unlike traditional concrete or metal traps, our Polypropylene (PP) and HDPE systems are 100% resistant to corrosion and rust. Their smooth surfaces prevent bacterial growth and persistent foul odors, supporting sanitation.
• Ease of Maintenance: They are designed with accessible, leak-proof lids and wide chambers suitable for cleaning requirements, allowing for regular, easy maintenance.

Primary Application Areas for Grease Traps

Grease traps are mandatory in every commercial and industrial facility where FOG waste is generated:

• Commercial Kitchens and Restaurants: The most common application area. Installed at the exit of all food preparation and washing units.
• Hotels and Resorts: High-volume, multi-kitchen systems that generate continuous FOG waste.
• Hospitals, Schools, and Institutional Canteens: Discharge lines for large-volume collective food production areas.
• Food Processing Facilities: Pre-treatment of process wastewater containing high levels of animal fat, such as meat, dairy, and bakery facilities.