Hitachi Zosen Inova Kompogas Plant for E.ON Biofor Sverige AB : 83,000 TPA Dry AD Plant to Inject Biogas from Food Waste into Swedish Grid

Hitachi Zosen Inova Kompogas anaerobic digestion biogas grid injection sweden food waste
© Hitachi Zosen Inova

Swedish utility E.ON Biofor Sverige AB has signed a contract with waste to energy technology firm, Hitachi Zosen Inova (HZI), to build Scandinavia's first large Kompogas® dry anaerobic digestion plant.

According to HZI it will generate enough biogas every year to replace nearly 7 million liters of fossil fuels, thus contributing to Sweden’s strategy of decarbonising its economy.

Located to the north west of the Swedish capital of Stockholm the plant will be the first of its kind in Scandinavia and will take around 18 months to construct.

In 2015 Sweden launched an initiative aimed at markedly reducing CO2 emissions and making it the first industrialised nation in the world to become a fossil fuel-free economy.

HZI added that the highly automated Kompogas plant will form part of a cluster of energy from waste facilities at the Renewable Energy Park in Högbytorp, around 40 km north west of Stockholm. Three Type PF 2100 steel digesters will process around 83,000 tonnes of green and food waste as well as biowaste every year.

he waste will be collected separately and delivered from across the Upplands-Bro region. A sophisticated airlock system will prevent odour emissions escaping from the delivery hall into the surrounding.

The digestion process takes around 14 days and the biogas produced biogas will be upgraded into 6,800,000m3 of biomethane and fed into the gas grid – the equivalent of around 7 million litres of fossil fuels.

The resulting digestate will then be dewatered, with the liquid fraction being used as liquid fertiliser by local farmers and the solid material being processed further on site to high-grade compost.

HZI said that the project schedule envisages engineering work immediately after the contract is signed on 27 February, 2017 with a start of on-site construction work in September 2017.

The first feed into the digester is planned for summer 2018.

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