Malt firm Muntons leads by example as it unveils £5.4million AD plant

The official opening of the new anaerobic digestion plant at Muntons in Stowmarket by Baroness Scott

The official opening of the new anaerobic digestion plant at Muntons in Stowmarket by Baroness Scott. - Credit: Archant

A malt firm underlined its commitment to practical sustainability as it unveiled its £5.4million state-of-the-art anaerobic digestion plant.

The official opening of the new anaerobic digestion plant at Muntons in Stowmarket by Baroness Scott

The official opening of the new anaerobic digestion plant at Muntons in Stowmarket by Baroness Scott. Baroness Scott and Nigel Davies (manufacturing and sustainability director). - Credit: Archant

Stowmarket-based Muntons is set to generate a quarter of its electricity from the new plant, as well as recycling its own waste products into energy and into fertiliser for farmers.

At a stroke, the just-completed plant has cut out about 3,000 tanker movements a year, thus reducing the site’s CO2 emissions by 340 tonnes.

Muntons has led the way in establishing a policy of “sustainability that pays”, showing other businesses how investing in environmentally-friendly measures can be good for their bottom lines.

It expects to recoup the cost of the plant within the next four and a half years.

The official opening of the new anaerobic digestion plant at Muntons in Stowmarket by Baroness Scott

The official opening of the new anaerobic digestion plant at Muntons in Stowmarket by Baroness Scott. - Credit: Archant


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Guests, including Baroness Scott of Needham Market, who officially opened the plant on Friday, were shown how it treats liquid waste streams from Muntons’ malt extract production by taking it through a process where micro-organisms break down biodegradable material in the absence of oxygen.

A second process generates biogas, used to power a Combined Heat and Power unit providing 500KWh of electricity, around 25% of Muntons’ base load requirement. Visitors were also taken on a nature trail set up around the plant so that staff could enjoy a wildlife walk.

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Manufacturing and sustainability director Nigel Davies said their aim was to influence their supply chain to do things more sustainably.

Farmers growing barley to make the malt had the biggest carbon footprint, but the company would now be able to supply them with phosphate-rich fertiliser.

The official opening of the new anaerobic digestion plant at Muntons in Stowmarket by Baroness Scott

The official opening of the new anaerobic digestion plant at Muntons in Stowmarket by Baroness Scott. - Credit: Archant

“We are making this work for us locally,” he said. “It was important for us to lead by example.”

The project has an “excellent” payback, and was meticulously researched and trialled before it was given the go-ahead, guests heard.

Even so, it was initially hard to find lenders willing to back it because of scepticism about AD schemes.

Baroness Scott described it as a “magnificent” project and said she was not surprised the company had won awards for sustainability. It was a scheme people in Suffolk could be proud of, she added.

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