Pathway family
AD + CO₂ storage
Wet biogenic materials such as food scraps, grocery organics, beverage residue, and source-separated organics may support AD systems. CDR requires captured biogenic CO₂, durable storage, emissions accounting, and leakage controls.
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Biochar and solid carbon
Clean biomass can be pyrolyzed into more stable solid carbon for soil, non-soil, material, or storage applications. Feedstock quality, contaminants, durability, and end use decide route status.
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Hydrothermal carbonization / hydrochar
Wet biomass may be processed under heat and pressure to produce hydrochar and other outputs. This is relevant where drying costs make conventional pyrolysis difficult.
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BECCS / gasification + CCS
Prepared biogenic waste may be converted for energy, syngas, fuels, heat, power, or products with CO₂ capture and durable storage. Fossil carbon fractions must be separated in accounting.
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Mineralization and carbonated materials
Captured biogenic CO₂ can be reacted into stable mineral carbonates or used in carbon-storing materials. This is often a destination for captured CO₂ rather than raw MSW itself.
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Bio-oil or liquid carbon storage
Biomass may be converted into a liquid carbon product and stored in accepted durable storage routes where project criteria are met.
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Biomass burial / solid storage
Some woody or lignin-rich biomass may support long-term storage under controlled conditions. This requires careful durability, leakage, and alternative-fate analysis.
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Existing facility retrofit routes
Existing composting sites, AD facilities, transfer stations, WtE assets, landfills, and organics processors may be upgraded with carbon capture, pyrolysis, HTC, mineralization, biochar, or MRV systems.
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