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 building at its Sines refinery in 2026, the company, which is mostly an oil manufacturer 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 capability of 270,000 metric loads per year.

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

Galp stated in a declaration it received on Wednesday the 3 reactors to process biofuels, which will enable the HVO system to "produce SAF and biodiesel in 2026 ... placing Galp at the forefront of developing low-carbon options important for the energy shift".

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