The production of Multicopy paper is about to contribute to the biofuel production in
The energy company Gasum and
Wastewater can be a challenge for mills. Vast volumes of process water containing organic residues need to be treated. At the
'Nymolla Mill has long been a leading light in sustainability,' says
'We've been looking into biogas for many years,' confirms
As renewable energy rose on the global agenda, the idea evolved into selling biogas. Given the challenges that remained, teaming up with a partner who really knows biogas was the best way forward.
'I have talked with
Gasum not only brings technical know-how in producing biogas, but also has a distribution network. These factors help to make the biogas partnership a powerful combination from which
Creating value from waste
Looping the mill's process water through the biogas reactors breaks down the organic content to produce methane. 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.
This project is a wonderful opportunity for Gasum to demonstrate how biogas is a viable renewable fuel made from what would otherwise be burdensome waste for mills.
'The key here is that today we can liquify the biogas,' explains Woode. 'Historically it was quite expensive to do that, but technology has advanced to the point where we can do it economically.'
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. LBG emissions are 90 per cent less than diesel, and LBG produces far fewer particulates, further minimising impact on air quality.
Replacing liquid natural gas (LNG) with LBG is the immediate goal. 'LBG is what we call a drop-in fuel,' explains Woode. '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.'
The LBG from Nymolla will improve the overall balance of renewable energy in
The excitement builds with a twist
Even with the best plans, a global pandemic is tough to mitigate. Travel restrictions and quarantines kept works from coming to the site. 'We were in a difficult situation if there ever was one,' says Lindemann. 'For our part, the mill is ready to go, and that was fortunate with our hot summer.'
The heat nearly killed the microbes in the water treatment facility. Luckily, the heat exchange system for the flow to the Gasum facility was already in place, so it was used to cool the effluent and save the microbes.
Final assembly of the LBG plant should be completed during springtime this year. The mill will start pumping water shortly thereafter, followed by a ramp up period as Gasum tunes operations for full capacity.
'Something that I really appreciate is that
Many people are eagerly waiting to see those results. 'I'm also very excited to see the project come to completion,' says Bakewell. 'Not only does it make our mill more efficient, but Multicopy paper, our star product out of Nymolla, gets a wonderful new chapter as a biogas generator in its sustainability story.'
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