Neste, the world’s largest sustainable aviation fuel (SAF) producer, has started production of the renewable fuel at its European facility in Rotterdam. The plant was undergoing modifications to produce SAF when it suffered a fire, throwing delays into the timeline.

Now complete, the enhancements allow Neste to produce up to 165 million gallons (625 million liters) of SAF a year at the Netherlands location. This brings its global SAF production capacity to nearly 500 million gallons a year.

Further planned expansions of the Rotterdam facility are slated for completion in 2027. These will more than double its output of renewable diesel and SAF to 900 million gallons a year, making it the world’s largest renewable fuels refinery. By that time, Finland-based Neste—which also operates refineries in Singapore and Porvoo, Finland—anticipates its global production to be in the range of 2.25 billion gallons annually, of which 726 million will consist of SAF.

“It is clear that we need to continue making progress in mitigating climate change and addressing aviation’s climate impact,” said company president and CEO Heikki Malinen. “Our SAF production capability, now also in Rotterdam, enables us to significantly contribute to the implementation of the ReFuelEU Aviation Regulation and similar SAF mandates. Policies like these are crucial to ramping up SAF production and usage, and we need to keep our ambitions and targets high.”