Novocarbo, a German climate tech company specializing in biochar-based carbon removal, has signed a long-term partnership with Stadtwerke Dessau, the municipal utility serving the city of Dessau in Germany. The deal will see Novocarbo supply both biochar carbon removal credits and renewable heat to the utility, a pairing that highlights how CDR infrastructure can double as local energy infrastructure.
Why it matters
Municipal utilities are not the buyers most people picture when they think about carbon removal demand. The typical CDR customer profile skews toward big tech companies and corporate sustainability teams chasing net-zero pledges. A German Stadtwerk, a publicly owned local utility, signing a long-term biochar deal signals something different: CDR is starting to find a home in the mundane, essential business of heating buildings and managing local energy supply. That’s a distribution channel worth paying attention to.
What we know about the deal
The details available are limited. We know this is a long-term agreement, not a one-off purchase. Novocarbo will provide biochar carbon removal alongside renewable heat to Stadtwerke Dessau. Beyond that, the specific tonnage of carbon removal, the financial terms, and the exact timeline have not been disclosed in the reporting. What we can say is that the structure of the deal reflects the core economics of biochar production through pyrolysis. When biomass is heated in the absence of oxygen, it produces biochar, a stable, carbon-rich solid, along with significant thermal energy as a byproduct. That heat is not waste. It can be captured and fed into district heating networks, which are common across German cities. Dessau, like many mid-sized German municipalities, relies on centralized heat distribution, making it a natural fit for this kind of arrangement. Novocarbo operates pyrolysis plants and has been building out its capacity in Germany. The company produces European Biochar Certificate (EBC) certified biochar and sells carbon removal credits alongside the physical biochar product. Their model depends on stacking revenue from multiple outputs: carbon credits, biochar sales for agricultural or industrial use, and heat delivery.
The municipal utility angle
This is where the deal gets interesting from a structural perspective. Stadtwerke, Germany’s network of roughly 900 municipal utilities, collectively serve tens of millions of people with electricity, gas, water, and heat. They are deeply embedded in local infrastructure planning and have long investment horizons. When a Stadtwerk signs a long-term supply agreement, it’s not a PR gesture. It’s a procurement decision tied to real infrastructure needs. Germany’s heat transition, the Wärmewende, is pushing municipalities to decarbonize their district heating networks. Coal and natural gas are being phased down, and cities need replacement heat sources. Pyrolysis heat from biochar production fits neatly into this gap. It’s renewable, it’s dispatchable (meaning it runs when you need it, not just when the sun shines), and it comes with the added benefit of permanent carbon removal. For Novocarbo, locking in a municipal utility as a long-term heat offtaker solves one of the trickiest problems in biochar economics: revenue predictability. Carbon credit markets are volatile. Biochar demand for soil amendment is growing but still niche. Heat, on the other hand, is a commodity with steady, year-round demand and established pricing. A long-term heat supply contract provides the kind of bankable revenue stream that makes it easier to finance new pyrolysis capacity.
Implications for the CDR field
If this model replicates across other Stadtwerke, it could create a meaningful demand channel for biochar CDR in Germany that doesn’t depend on voluntary carbon markets alone. Municipal utilities buying pyrolysis heat as part of their decarbonization plans would pull biochar carbon removal into the regulated energy sector, where contracts are longer, counterparties are creditworthy, and infrastructure investment follows. The question is whether other municipalities will follow Dessau’s lead. Germany’s heat planning law (Wärmeplanungsgesetz) requires larger cities to develop climate-neutral heating plans by mid-2026, with smaller municipalities following by 2028. That regulatory pressure creates a window for biochar pyrolysis to compete against heat pumps, geothermal, and industrial waste heat for a share of the district heating mix.
Caveats
We’re working with a thin set of details here. The tonnage of carbon removal involved, the price per ton, the duration of the contract, and the capacity of the pyrolysis plant serving Dessau are all unknown from the available reporting. Without those numbers, it’s hard to assess the scale of impact. It’s also worth noting that biochar CDR, while promising, faces its own measurement challenges. The permanence of carbon storage in biochar depends on the production temperature, feedstock quality, and end-use application. High-quality pyrolysis at temperatures above 500°C produces biochar that can store carbon for centuries, but not all biochar is created equal. Finally, CDR of any kind is meant to address residual emissions that can’t be eliminated through direct decarbonization. A municipal utility buying biochar heat is primarily making an energy procurement decision. The carbon removal is a co-benefit. That’s fine, and arguably it’s the healthiest way for CDR to scale, bundled with real utility rather than sold as an abstract offset. But it means the carbon removal volumes will be shaped by heat demand, not by climate targets.
Source: Carbon Herald