BD series

The critical technologies for biodiesel processing are heating, separation and mixing. Alfa Laval supplies products within all three technologies for the different production steps.

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Moreover Alfa Laval can supply the complete biodiesel pre-treatment installation needed. As a leading manufactor of centrifugal separation systems, Alfa Laval have a specially designed separator range for biodiesel processing.

Transesterification, the heart of the biodiesel process, calls for efficient separation of glycerine from biodiesel. With the BD-range of separators for biodiesel, Alfa Laval offers the renewable energy sector a tailored match. The complete range of separators consist of five models with different centrifuge capacities. The range provides separation with minimum product loss during discharge and low energy and utility consumption.

The BD centrifuges comes complete with control unit, flameproof electric motor, inlet and outlet connections, auxiliary equipment, a spare parts kit and a set of tools.

The separator consists of a frame with a base that contains a horizontal drive shaft, worm gear, lubricating oil bath, and hollow vertical bowl spindle.

The bowl is fixed on top of the spindle, inside the space formed by the upper part of the frame, the solids collecting cover, and the frame hood. The hood carries the liquid discharge system.

All parts in contact with the process liquid are made of stainless steel. The bowl is a solids ejecting disc type, with an automatic hydraulic operating system for “shooting”.


How it works

The BD centrifuge is a three-phase centrifuge system purpose-built for removing both water and solids from the oil. This type of centrifuge is also widely known as a purifier and it consists of a bowl that rotates around a vertical axis.

Inside the bowl is a stack of conical discs where the separation takes place.

Rotating this bowl at high speed means that the effect of gravity on solids and liquids of different mass is replaced by a controllable centrifugal force, which can have an effect corresponding to thousands of times that of gravity. When subject to such forces, the solid particles and water – which are denser – are pressed outwards against the rotating bowl wall.

The BD centrifuge is based on a unique, semi-hermetic design concept. The hermetic, bottom-fed inlet ensures a gentle, non-destructive acceleration of the feedstock up to full bowl speed.

Stay connected - Imagine the possibilities if you could have an eagle eye’s view of your equipment


Ensuring that customers get outstanding and reliable performance from their equipment throughout its long lifetime is our top priority. That’s why we’re investing heavily in R&D for IoT (internet of things) services to interconnect your production and control systems. You'll have vital information at your fingertips to truly get the most from your equipment – each and every day.

This suite of connectivity solutions provides highly valuable insights to help increase efficiency and reliability, boost uptime and reduce maintenance costs.

  • Condition monitoring with ConditionAlert TM - Identifies early-stage defects in your high speed separator and gives you a warning along with a service recommendation well before major problems arise

Learn more