Once again Hitachi Zosen Inova will be joining forces with its partner Cesaro Mac Import, which leads the Italian dry anaerobic digestion market, to build a Kompogas® plant in Italy. The plant in Legnano will recycle 40,000 t/a of organic waste and 12,400 t/a of green waste to produce high-grade biomethane which will be fed into the natural gas grid and serve as energy and fuel.

A new organic waste recycling plant is being constructed in Legnano, around 30 km to the northwest of Milan. The installation is built around the Kompogas® technology of Hitachi Zosen Inova (HZI) and the composting system of Cesaro Mac Import (CMI). Input material, consisting of the organic fraction of municipal solid waste (OFMSW) and green waste, will be fermented under anaerobic conditions (i.e. excluding oxygen) and then composted. This process produces biogas, and maximises the yield on the input material. Besides generating valuable biomethane, the digestate will go to make high-grade compost for agriculture. Construction is expected to start in 2020 and commissioning will follow in early 2021.

“We’re proud to be delivering another project with HZI in Italy. Working with Hitachi Zosen Inova always gets the job done successfully,” says Luigi Cesaro, director at Cesaro Mac Import. The plant in Legnano is already the sixth project that HZI will have delivered in partnership with CMI in Italy, and the second installation for the client ASJA Ambiente (ASJA), a leader in generating electricity from landfill gas, wind, photovoltaics and biomass. HZI completed the first plant for ASJA at the end of 2018 in cooperation with CMI in Foligno in the Province of Perugia.

Kompogas® Technology Supplies Households and Natural Gas Vehicles with Biomethane
HZI will deliver the plant’s dry fermentation module in the form of two PF1300 steel digesters with the corresponding technology, including the control system. This module will be used to recycle 40,000 t/a of OFMSW and 12,400 t/a of green waste. This means that up to 15,000 Nm3 of biogas will be produced every day. This biogas will be upgraded to high-quality biomethane. Acccording to ASJA, high-purity biomethane will be fed into the local gas grid to be used for any application of natural gas (household and industry), including the environmentally-friendly fuel compressed natural gas (CNG). This will operate local and regional households and natural gas vehicles thus contribute directly to the decarbonisation of the region.

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