Abstract
Over the past decade, one of the main challenges in the industry concerns reusing/recycling wastewater, mainly due to its high treatment cost and complexity. The integration of waste-to-hydrogen strategy proposes a potential revalorization of waste into value-added products towards a circular economy model. Integrating industrial wastewater (IWW) electrolysis into the supply chain potentially represents a sustainable approach for H2 production and wastewater treatment. This critical review analyses the current status and evaluates the main variables of a hydrogen production model using diverse IWW typologies in contrast to electrolytic water splitting and electrolysis of conventional organic compounds. Considering future prospects, further studies are highly required to assess the optimal configuration for each IWW with a well-balanced cost-sustainability-efficiency performance.
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