Three Phase Decanter Centrifuge for Food Waste Oil Recovery

Three Phase Decanter Centrifuge for Food Waste Oil Recovery is designed for separating oil, liquid, and organic solids from crushed food waste slurry and kitchen waste streams.

Food waste is usually not clean waste oil. It contains high moisture, grease, food residue, fibers, starch, protein solids, sand, and suspended organic matter.

A three phase decanter centrifuge helps recover grease from the mixed slurry while reducing the oil and solids load before downstream treatment.

• Kitchen waste slurry oil recovery
• Food waste pulp separation
• Central kitchen organic waste treatment
• Canteen food residue slurry separation
• Oil recovery from wet organic waste streams
• Pre-separation before anaerobic digestion
• Organic solids and liquid phase separation
• High-moisture food residue pretreatment
• Municipal food waste recycling projects
• Integrated food waste resource recovery systems

Crushed food waste slurry enters the rotating bowl through the feed pipe.

Under centrifugal force, heavier organic solids, fibers, starch, protein particles, and sand move outward and form a solid layer on the bowl wall.

The water-rich liquid phase forms the heavier liquid layer, while the oil or grease phase stays closer to the center as the lighter liquid phase.

The screw conveyor continuously pushes separated organic solids toward the discharge end. The oil phase and liquid phase are separated internally and collected according to the process design.

Technical Parameter

The system helps recover grease from high-moisture organic slurry before downstream treatment.

Removing oil early can reduce floating grease, pipeline blockage risk, and wastewater treatment pressure.

Food residue, fibers, starch, protein solids, and sand can be discharged continuously by the screw conveyor.

Separating oil and heavy solids helps make the remaining liquid phase more stable for digestion or further biological treatment.

Sealed structure and flushing options can help reduce organic build-up and improve site operation.

The centrifuge can be integrated with shredding, screening, heating, buffer tanks, oil collection, liquid treatment, and solids discharge systems.

Under suitable feed temperature and operating conditions, the system can typically help achieve:

• 60–90% recoverable grease recovery, depending on oil content and emulsification level.
• 50–80% suspended solids reduction in the separated liquid phase.
• 30–60% reduction in mixed residue volume, depending on food waste solids content.
• 30–60% reduction in oil load before downstream wastewater treatment or anaerobic digestion.
• 8–24 hours/day continuous operation, depending on plant design and cleaning frequency.

Final performance depends on food waste composition, oil content, water content, solids content, particle size, temperature, viscosity, and operating parameters.

To recommend a suitable three phase decanter centrifuge for food waste oil recovery, please provide:

• Feed material type
• Processing capacity, in m³/h or tons/day
• Oil / grease content
• Water content
• Solids content
• Food residue particle size
• Whether large impurities are screened out
• Feed temperature
• Feed viscosity or fluidity
• Whether heating is available
• Target grease recovery rate
• Target liquid phase quality
• Target solids discharge condition
• Cleaning and odor control requirements
• Required operating hours per day
• Site voltage and control preference
• Need for skid-mounted system or not

It is used to recover oil or grease from food waste slurry while separating water-rich liquid and organic solids.

Used cooking oil recovery mainly treats collected waste oil. Food waste oil recovery treats mixed kitchen waste slurry with more water, organic solids, fibers, starch, and food residue.

Usually yes. Large bones, plastics, shells, packaging pieces, and hard foreign matter should be removed before feeding.

Heating may improve grease separation when the feed is viscous or the grease is difficult to release from the slurry.

Yes. It can remove part of the oil and heavy solids before anaerobic digestion or other downstream treatment.

Yes. The system can include screening, feed pump, buffer tank, heating unit, centrifuge, oil collection, liquid outlet, solids discharge, and PLC control.

If you have customer resources or project opportunities in food waste recycling, kitchen waste treatment, organic waste pretreatment, grease recovery, or oil-water-solid separation, Peony welcomes cooperation.

We support distributors, agents, and project partners with model selection, process advice, customized configuration, equipment manufacturing, installation guidance, spare parts, and after-sales service.

Send us your market, customer type, and project details. Our team will help evaluate the suitable separation solution.