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This case study examines the Hydrogen Olona Valley project, a large-scale urban regeneration initiative designed to transform a 550,000 m2 abandoned industrial site in Cairate, North of Italy, into a hydrogen-based innovation hub. Initiated in 2021 by Expand s.r.l., the project seeks to revitalize the disused Vita-Mayer and VIMA paper mills through the deployment of green hydrogen technologies aligned with European climate objectives and circular-economy principles. The strategic vision centers on establishing a hydrogen valley powered by solar energy and wastewater treatment systems, with the dual goal of environmental restoration and economic revitalization. Market analysis identified a regional demand of approximately 1500 tons of hydrogen per year, mainly from the transportation, medical and industrial sectors. The first phase of the project, supported by € 11.5 million in European grants, involves constructing a solar-powered electrolyzer capable of producing 102 tons of green hydrogen annually by 2026. A second co-located facility will employ sewage sludge to increase hydrogen production by addicional 500 tons per year, making use of existing wastewater infrastructure to close local material loops between the two plants: the electrolyzer supplies oxygen to the sewage treatment plant, while the latter provides sewage sludge to the wastewater infrastructure for hydrogen generation. A third phase forsees the implementation of a synthesis plant that will combine C02 with H2 to produce CH3OH (e-methanol), a strategic e-fuel for the decarbonization of hard-to-abate sectors such as air and sea transport. Beyond clean-energy production, the initiative also supports real-estate redevelopment and has attracted interest from international investors. Overall, the project represents a replicable model for post-industrial site transformation that integrates renewable-energy deployment, ecosystem restoration, and social impact. Its multi-stakeholder governance structure, inclusion of hard-to-abate sectors, and alignment with EU energy-transition policies highlight its potential as a strategic reference for sustainable urban innovation.

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Hydrogen Olona Valley: Industrial Regeneration and Green Hydrogen Deployment in a Circular Urban Economy

  • 章节

  • 发表日期：

    2026年

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  • Lisa Manieri

摘要

This case study examines the Hydrogen Olona Valley project, a large-scale urban regeneration initiative designed to transform a 550,000 m2 abandoned industrial site in Cairate, North of Italy, into a hydrogen-based innovation hub. Initiated in 2021 by Expand s.r.l., the project seeks to revitalize the disused Vita-Mayer and VIMA paper mills through the deployment of green hydrogen technologies aligned with European climate objectives and circular-economy principles. The strategic vision centers on establishing a hydrogen valley powered by solar energy and wastewater treatment systems, with the dual goal of environmental restoration and economic revitalization. Market analysis identified a regional demand of approximately 1500 tons of hydrogen per year, mainly from the transportation, medical and industrial sectors. The first phase of the project, supported by € 11.5 million in European grants, involves constructing a solar-powered electrolyzer capable of producing 102 tons of green hydrogen annually by 2026. A second co-located facility will employ sewage sludge to increase hydrogen production by addicional 500 tons per year, making use of existing wastewater infrastructure to close local material loops between the two plants: the electrolyzer supplies oxygen to the sewage treatment plant, while the latter provides sewage sludge to the wastewater infrastructure for hydrogen generation. A third phase forsees the implementation of a synthesis plant that will combine C02 with H2 to produce CH3OH (e-methanol), a strategic e-fuel for the decarbonization of hard-to-abate sectors such as air and sea transport. Beyond clean-energy production, the initiative also supports real-estate redevelopment and has attracted interest from international investors. Overall, the project represents a replicable model for post-industrial site transformation that integrates renewable-energy deployment, ecosystem restoration, and social impact. Its multi-stakeholder governance structure, inclusion of hard-to-abate sectors, and alignment with EU energy-transition policies highlight its potential as a strategic reference for sustainable urban innovation.