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The excitement builds with a twistĮven with the best plans, a global pandemic is tough to mitigate. That’s enough to power the equivalent of 13 000 cars a year. The LBG from Nymölla will improve the overall balance of renewable energy in Sweden considerably, accounting for a 5 per cent increase in biogas production. “It is 1-to-1 with LNG, and we are hurrying now to fill our stations with LBG because that is what our customers want.” “LBG is what we call a drop-in fuel,” explains Woode. Replacing liquid natural gas (LNG) with LBG is the immediate goal. LBG emissions are 90 per cent less than diesel, and LBG produces far fewer particulates, further minimising impact on air quality. Liquified biogas (LBG) is comparable in energy-density to diesel fuel, making it ideal for the heavy transportation sector, a major source of carbon emissions.
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“The key here is that today we can liquify the biogas,” explains Woode. This process reduces the organic content up to 60 per cent after just five hours in the reactors, leaving far less to be treated in the wastewater facility. Looping the mill’s process water through the biogas reactors breaks down the organic content to produce state biogas.
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These factors help to make the biogas partnership a powerful combination from which Stora Enso, Gasum and the environment all benefit. Gasum not only brings technical know-how in producing biogas, but also has a distribution network. “When Gasum came into the picture on this project, it really was a game changer.” “I have talked with Stora Enso in different roles throughout my career in Swedish biogas,” says Erik Woode, Director, Biogas Business Development at Gasum. Given the challenges that remained, teaming up with a partner who really knows biogas was the best way forward. “When we initially determined biogas could be made from our process water, we wanted to use it to power the mill.”Īs renewable energy rose on the global agenda, the idea evolved into selling biogas. “We’ve been looking into biogas for many years,” confirms Michael Lindemann, Mill Director at Nymölla. “Even though today the paper production process is essentially carbon-neutral, they always want to do more.” “Nymölla Mill has long been a leading light in sustainability,” says Jonathan Bakewell, VP, Office Papers, Stora Enso Paper Division. At the Stora Enso’s Nymölla Mill, the water treatment facility is the size of ten football fields, and each holding basin is seven metres deep. Vast volumes of process water containing organic residues need to be treated.