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

In 2015 Galp entered into a 75%-25% joint endeavor 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 heaps each year.

It will change waste products, such as utilized cooking oils, into sustainable biodiesel and biojet fuel, likewise called sustainable aviation fuel (SAF), utilizing green hydrogen produced by an powered by wind or solar power.

Galp stated in a declaration it got on Wednesday the 3 reactors to process biofuels, which will permit the HVO system to "produce SAF and biodiesel in 2026 ... positioning Galp at the forefront of establishing low-carbon options important for the energy transition".

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