Three Phase Decanter Centrifuge for Biodiesel is designed for pretreatment of biodiesel feedstock by continuously separating oil phase, water phase, and solid impurities from waste oil or fat-based raw materials.

Biodiesel feedstock may contain free water, fine solids, food particles, sludge, soap, protein residue, catalyst residue, or other process impurities. If these contaminants are not removed before downstream processing, they may affect reaction stability, increase filtration load, reduce product quality, and raise operating cost.

This centrifuge is mainly used for biodiesel feedstock pretreatment, not final biodiesel polishing. It helps prepare a cleaner and more stable oil feed before esterification, transesterification, filtration, or refining.

• Biodiesel feedstock pretreatment
• Waste oil pretreatment before biodiesel production
• Used cooking oil pre-separation
• Animal fat feedstock clarification
• Grease-based feedstock separation
• Oil-water-solid removal before esterification
• Solid impurity removal from low-grade oil feedstock
• Pretreatment before biodiesel filtration or refining
• Feed stabilization before transesterification
• Recovery of usable oil from mixed biodiesel raw materials

Biodiesel production requires a relatively stable oil feed. Many low-cost feedstocks are not clean enough for direct processing.

If water and solids remain too high, the plant may face:

• Unstable esterification or transesterification
• Higher catalyst or chemical consumption
• More soap formation risk
• Higher load on filtration and polishing equipment
• More impurities in intermediate oil streams
• Lower feedstock consistency
• More frequent cleaning of tanks, pumps, and pipelines
• Reduced downstream process efficiency

A three phase decanter centrifuge helps remove water and solids before the feedstock enters the biodiesel process.

Cleaner Biodiesel Feedstock

The centrifuge removes water and solids from low-grade oil feedstock before downstream biodiesel processing.

Continuous Oil-Water-Solid Separation

Oil, water, and solid impurities are separated continuously in one machine.

Reduced Downstream Filtration Load

Removing solids earlier can reduce the burden on filters, polishing equipment, and storage tanks.

More Stable Reaction Feed

A cleaner and more consistent oil phase helps improve downstream esterification or transesterification stability.

Lower Water and Sludge Carryover

The machine helps reduce moisture and solid impurities entering biodiesel production equipment.

Flexible Feedstock Adaptability

It can be used for waste vegetable oil, used cooking oil, animal fat, grease recovery oil, and other fat-based feedstocks.

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

• 60–85% reduction of suspended solids before esterification, transesterification, or filtration.
• 30–60% reduction of free water in low-grade oil or fat-based feedstock.
• 30–50% reduction in sludge, food residue, ash, or heavy impurities, depending on feedstock quality.
• More stable oil feed quality before biodiesel reaction
• Lower load on filters, settling tanks
• Reduced risk of soap formation and unstable reaction, when water and solid impurities are properly controlled.
• 8–24 hours/day continuous operation

Final performance depends on feedstock type, oil content, water content, solids content, viscosity, temperature, emulsification level, and downstream biodiesel process requirements.

To recommend a suitable three phase decanter centrifuge for biodiesel feedstock pretreatment, please provide:

• Feedstock type
• Processing capacity, in L/h or m³/h
• Oil content
• Water content
• Solids content
• Particle size or impurity type
• Feed temperature
• Feed viscosity
• Whether heating is available
• Emulsification level
• Target oil recovery rate
• Target water content in oil phase
• Target solids reduction before reaction or filtration
• Downstream biodiesel process route
• Required operating hours per day
• Site voltage and control preference
• Need for skid-mounted system or not

What is this centrifuge used for in biodiesel production?

It is used to pretreat biodiesel feedstock by separating oil, water, and solid impurities before downstream reaction, filtration, or refining.

Is it used for final biodiesel polishing?

Usually no. A three phase decanter is mainly used for dirty feedstock pretreatment. Final biodiesel polishing is often handled by a disc separator, filter, or other fine separation equipment.

Can it process used cooking oil?

Yes. Used cooking oil can be one of the biodiesel feedstocks, especially when it contains water and solids that need to be removed before processing.

Is heating required?

Heating is often helpful because it reduces oil viscosity and improves oil-water-solid separation. The required temperature depends on feedstock condition.

Can it reduce water before biodiesel reaction?

Yes. It can reduce free water and water-rich liquid phase, but final water content may still require additional polishing or drying depending on process requirements.

If you have customer resources or project opportunities in biodiesel feedstock pretreatment, waste oil recycling, animal fat processing, 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.