HZI announces further UK RNG projects in Bio Capital collaboration
Its East London biogas plant is adding biomethane production and gas-to-grid injection to the existing electricity generation.
At a separate project in Norfolk, Bio Capital’s Corbiere biomethane plant will also incorporate renewable CO2 technology to produce food-grade carbon dioxide for sale in the UK market.
HZI will be supplying and delivering the necessary facilities for these projects in the coming year.
The anaerobic digestion plant located in the Sustainable Industry Park in Dagenham, East London, has been in operation since 2012. Two years ago, it was extended to increase its treatment capacity to 70,000 tonnes a year, allowing the facility to process more food waste into green electricity and biofertiliser.
Now the facility is to be converted from electricity generation to also include biomethane production, using a gas upgrading system supplied by HZI: an M-Series gas upgrading unit with a treatment capacity of 1,200 Nm³/h raw gas.
The process will entail separating the carbon dioxide (CO2) contained in the biogas from the methane, which will then be fed into the natural gas grid.
Deployed as a renewable natural gas substitute, methane can be used more flexibly than electricity, which increases the added value for energy consumers. First feed-in is scheduled for August this year.
The Corbiere Renewables plant is located on the Raynham Farm Estate, around 40 kilometres northwest of Norwich. It recycles organic residues from farming into biogas, which is converted into biomethane and fed into the gas grid.
In turn, the farm creates biofertiliser to use in the production of crops. This re-use of valuable biofertilisers has already reduced the use of chemical fertilisers by 50%, according to Bio Capital.
As with the Granville Eco Park plant, in the future Bio Capital will capture the carbon dioxide from the upgrading process to market it as a product gas for commercial use.
HZI is building the necessary pipelines, a precleaning system and a liquefaction system with a capacity of about 750 kg of carbon dioxide per hour. The extension to the plant is scheduled for commissioning between December 2024 and February 2025.
David McKee, CTO of Bio Capital, said: “Similar to what we’re doing at our Granville plant in Northern Ireland, here too we’re planning to retrofit liquefaction equipment to make good use of the by-product of the upgrading process.”
He also emphasised a common vision: “Like our partner HZI, we’re not just interested in securing a supply of energy from renewable sources; we also want to maximise circularity to ensure the best possible use of resources. This streamlining of the plant and its resources will take us a step further along the path to meeting our net zero goal.”
HZI added that augmenting renweable technologies is an indispensable part of its efforts to maximise the use of biogenic resources, reduce the emissions of carbon dioxide and safeguard the energy supply.
“Existing plants also offer enormous potential,” said Fabio Dinale, executive vice president of business development at HZI.
“For this reason, we’ve made it part of the focus of our product portfolio to offer operators appropriate solutions by future-proofing existing plants to meet our clients’ future requirements. Recent orders for retrofits around biomethane and CO2 liquefaction confirm that there is a growing need for these technologies.”