In an innovative project in the Hamburg Metropolitan Region, the Bützburg biogas and composting plant is set to increase its biomethane production by 20% and generate green hydrogen through a newly acquired electrolyser. This initiative, funded with EUR 2.5 million from the German Ministry for Economics and Climate Protection, aims to reduce the reliance on fossil natural gas and decrease emissions. The electrolyser, with a capacity of 1.1 megawatts, is a key component of the 'Synergy of Power to Gas and Biowaste Treatment' project, the first of its kind in Germany. The project, endorsed by Jens Kerstan, the Senator for the Environment, is expected to showcase significant efficiency by combining green hydrogen production with enhanced biogas yield from the plant. The project's coordinator, Mike Blicker, highlights the technological innovation of using green hydrogen in the fermentation of household biowaste, emphasizing the potential for future applications. The collaborative effort involving various stakeholders from energy, industry, science, and politics is geared towards achieving climate neutrality and fostering sustainable energy practices. If successful in Bützburg, this green hydrogen production model could be replicated in other municipalities, offering a promising path towards sustainable energy production and environmental conservation.