HRS heat exchangers creates anaerobic digestion plant for Muntons
Image by cizauskas via Flickr
The food sector has invested heavily in bioenergy projects such as biomass boilers and anaerobic digestion but where heat which is generated or used in one part of a process is lost rather than reused, according to HRS.
One of the most common situations where heat is wasted is where businesses have installed an AD plant to manage their food waste and factory by-products, said Matt Hale, international sales manager, HRS Heat Exchangers.
Heineken, Weetabix, Maltesers & Ovaltine
“In most cases the primary energy output is electricity supported by Feed-in-Tariffs (FITs) which is used on site or exported to the grid,” he added.
“The electricity is generated by a gas engine combined heat and power plant, but what happens to the heat? In some cases it is used for processing or heating the food factory, but often not to its full potential.
“Implementing HRS heat exchanger technology, to use waste heat from one process to fuel another, could save food factories 7.5 pence per kWh² used.”
One such company is Muntons malted ingredients based in Suffolk, UK which supplies malt to Heineken beer, Weetabix, Maltesers and Ovaltine.
The firm uses 250,000 tonnes of barley to manufacture 180,000 tonnes of malt pa, which it sells the brewing and distilling industry and makes a range of malted ingredients used in food, confectionery and baking.
The company is currently putting the finishing touches to its £5.4m on-site anaerobic digestion (AD) plant. Integral to the success of the 499 kW facility is a 3 Tank Batch Sludge Pasteuriser System with Energy Recovery from HRS Heat Exchangers, which will help turn 80,000 tonnes of Muntons’ liquid malt waste into biogas and organic fertiliser.
This biofertiliser will be then be applied to local farmland, helping the company’s network of growers to produce the barley needed to make Muntons’ malt.
“For Muntons, this whole project has been about maximising efficiency. Although they have an abundance of heat, they still wanted to recapture what they could and our heat exchangers will provide at least 40% heat regeneration,” said Hale.
AD is a fast-growing industry in the UK
He added AD is a fast-growing industry in the UK and has seen a steep rise in operational plants: from 192 in 2009 to 335 in January 2015. AD could deliver 10% of Britain’s domestic gas demands and reduce UK greenhouse gas emissions by 2%+ if industry reaches its potential: 40TWh of energy.Via HRS heat exchangers creates anaerobic digestion plant for Muntons
Gaunts Estate Anaerobic Digestion District Heating
Gaunts Estate near Wimborne, Dorset is the site of three new district heating schemes, powered by three separate anaerobic digestion plants.
Throughout the schemes, 1600m of REHAU’s flexible, pre-insulated RAUVITHERM pipework is being installed to connect the AD plants to the various farms, dwellings and countryside buildings on the estate.
Parliamentary report shows green gas heating up
A report [n Novermber 201]...by the Parliamentary Office of Science and Technology (POST), which used data collated from ADBA’s 2015 market report, has shown that seven per cent of the UK’s indigenous gas was supplied by biogas from anaerobic digestion (AD) and landfill gas last year.
In 2014, the UK produced 37 billion cubic metres (bcm) of natural gas and biogas combined; 2.6bcm of which was generated from AD and landfill. Since then the biomethane industry has quadrupled in scale, with 40 gas-to-grid plants now generating enough indigenous gas to heat over 100,000 homes or fuel around ten per cent of the UK’s bus fleet. POST estimate that UK natural gas production will fall from 2016, with biogas becoming an increasingly important part of our gas supplies.
The POST report’s release comes a week before the Spending Review, which will set out the government’s plans for future support for biomethane, and follows a recently leaked letter from the Energy Secretary, Amber Rudd, to her Cabinet colleagues that appears to signal recognition for biomethane’s role in a sustainable UK energy mix.ADBA’s Chief Executive, Charlotte Morton, commented:
The fact that green gas represented 7% of the UK’s indigenous gas supply in 2014 represents a colossal milestone for the biogas industry. And the timing could not be better as the Chancellor considers the future of the Renewable Heat Incentive, which is crucial to facilitate further growth in biomethane, in his Spending Review announcement next week.
With continued support for additional biomethane capacity, anaerobic digestion could potentially meet 30% of UK domestic gas demand.
The UK needs 20TWh more renewable heat by 2020 to meet the government’s 12% target – biomethane could deliver a third of that. via Parliamentary report shows green gas heating up | News | ADBA | Anaerobic Digestion & Bioresources Association