Berlin-based carbon credit procurement platform Senken has signed a multi-year offtake agreement with carbon removal developer Carbonsate for 50,000 tonnes of certified carbon removal credits spanning the 2026 to 2028 vintages. Representing the largest biomassBiomass is a complex biological organic or non-organic solid product derived from living or recently living organism and available naturally. Various types of wastes such as animal manure, waste paper, sludge and many industrial wastes are also treated as biomass because like natural biomass these More geological storage commitment by a European buyer and the largest worldwide for an African project, the transaction secures long-term carbon removal supply for corporate clients facing stringent net-zero compliance and reporting deadlines.

The primary operational challenge addressed in Namibia involves managing widespread encroacher bush, which degrades native savanna ecosystems, limits biodiversity, and reduces groundwater recharge. Historically, cleared biomass from land restoration efforts has been burned or left to decompose, releasing stored carbon back into the atmosphere. Additionally, project developers in the carbon removal sector face severe financial bottlenecks due to a lack of forward purchasing commitments, which restricts their ability to secure upfront capital and expand operations to match corporate net-zero demand.

To mitigate ecological degradation and optimize carbon permanence, Carbonsate collects the harvested encroacher wood and buries it in engineered underground chambers near Otjiwarongo, Namibia. The region’s arid climate prevents microbial decay and combustion, locking the carbon away for centuries without requiring energy-intensive capture processes. Carbonsate tracks the chambers through a proprietary monitoring, reporting, and verification system, issuing credits independently verified under the Puro.earth standard. Senken facilitated the agreement after evaluating the initiative through its Sustainability Integrity Index, which conducts a rigorous review across more than 600 data points.

The multi-year agreement provides Carbonsate with the revenue certainty required to scale its Namibian operations beyond 100,000 tonnes per year. Deliveries under the contract will commence in 2026, with an initial scheduled batch of roughly 10,000 credits. For Senken, the deal secures guaranteed, price-predictable access to high-integrity carbon removal for European corporate buyers seeking to fulfill Corporate Sustainability Reporting Directive requirements and Science Based Targets initiative standards.