Our plant pre-treats the tallow and used cooking oil which we use as feedstock to ensure that moisture, contaminants and other insoluble materials are removed. Oils then move to a pre-esterification phase, then onto full transesterification. After that, our by-products of glycerine and fertiliser are drawn off. The resultant raw biodiesel is washed and then purified by distillation to ensure that the quality of the final product meets European and British Standards.

Argent Energy is the only plant in the UK to use distillation technology. And it is this which ensures that our fuel is a homogenous, clear and very clean biodiesel.

A heavier ‘biofuel oil’ is produced during the distillation process. This renewable oil is used as fuel in our plant’s boiler, substantially reducing the environmental impact of our manufacturing process.