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

Last year Galp participated in 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 transform waste products, such as utilized cooking oils, into renewable biodiesel and biojet fuel, also referred to as sustainable air travel fuel (SAF), utilizing green hydrogen produced by an electrolyser powered by wind or .

Galp stated in a statement it received on Wednesday the three reactors to process biofuels, which will permit the HVO unit to "produce SAF and biodiesel in 2026 ... placing Galp at the forefront of establishing low-carbon options necessary for the energy shift".

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