LISBON, Dec 19 (Reuters) - Portugal's Galp Energia anticipates to begin producing biodiesel and biojet fuel from waste in an industrial-scale system it is developing at its Sines refinery in 2026, the business, which is mainly an oil and refiner, stated on Thursday.

In 2015 Galp entered into a 75%-25% joint venture with Japan's Mitsui to invest 400 million euros ($415 million) in the Hydrogenated Vegetable Oil (HVO) plant, which will have a production capacity of 270,000 metric loads annually.

It will change waste materials, such as used cooking oils, into eco-friendly biodiesel and biojet fuel, likewise understood as sustainable air travel fuel (SAF), using green hydrogen produced by an electrolyser powered by wind or solar energy.

Galp said in a statement it received on Wednesday the 3 reactors to process biofuels, which will allow the HVO system to "produce SAF and biodiesel in 2026 ... putting Galp at the leading edge of establishing low-carbon options vital for the energy transition".

Galp is also investing 250 million euros in a 100 megawatt (MW) electrolyser unit to produce green hydrogen to power the refinery in Sines. ($1 = 0.9637 euros) (Reporting by Sergio Goncalves