Segal Bio
A rainforest's work, in a fraction of the land.
Algae biohydrogen and carbon drawdown. Photosynthesis run at industrial density in closed reactors — green hydrogen straight from sunlight and water, with measured CO₂ removal.
Rebuild the rainforest. Bottle the surplus.
A rainforest is a solar-powered carbon pump and oxygen factory — slow, vast, and irreplaceable, except in one respect: its chemistry is reproducible. Microalgae run the same photosynthesis the canopy does, but stacked vertically in closed reactors they fix carbon many times faster per unit of land. Segal Bio rebuilds that function at industrial density — drawing down CO₂ and producing green hydrogen straight from sunlight and water, then feeding that hydrogen into the same firm-power and fuel-cycle systems the other programs depend on. We don't replace the rainforest. We reproduce its job in a fraction of its footprint, and ship the surplus as fuel.
Under sulfur-deprived, anaerobic conditions, green algae such as Chlamydomonas reinhardtii redirect photosynthetic electrons to hydrogenase enzymes, splitting water and evolving hydrogen directly — biophotolysis, hydrogen straight from light and water with no fossil input. The bottleneck is that hydrogenase is exquisitely oxygen-sensitive, and photosynthesis makes oxygen; sustained, high-yield H₂ depends on engineering oxygen-tolerant strains and reactor conditions that keep the two reactions decoupled.
In parallel, dense algal cultures in closed photobioreactors (PBRs) fix CO₂ at rates far above forest per hectare, turning the same biology into measurable, verifiable carbon drawdown plus biomass and biochar. One platform, three outputs: hydrogen as an energy carrier, carbon removed from the air, and circular biomass back into Segal Resources. The science is real at the bench; continuous, economic production is the frontier — and we say so.
- 10–50×
- CO₂ fixation per hectare vs mature rainforest— measured/target range
- CO₂-negative
- Net carbon balance — the floor we hold
- H₂ + O₂
- Outputs of splitting water with sunlight, nothing else in
- Closed loop
- Biomass returns to Resources, not landfill
SIMULATE
Coupled strain + reactor models of yield and gas exchange.
CULTIVATE
Dense algal culture in closed, controlled photobioreactors.
SPLIT
Biophotolysis — hydrogen from sunlight and water.
CONVERT
Fuel cell, turbine, or H₂ carrier for firm power.
DRAW DOWN
Verified carbon removal; biomass circles back to Resources.
Strain engineering
Detail on strain engineering is gated under U.S. export-control rules. Verified partners can request access — we confirm jurisdiction and eligibility before sharing.
Request accessClosed photobioreactor (PBR) design
Vertical, high-density, contamination-controlled reactors that stack photosynthesis far above its natural areal rate.
Direct biophotolysis
Hydrogen from sunlight and water with no fossil feedstock — electrons routed from photosynthesis to hydrogenase under anaerobic control.
Carbon fixation & drawdown
CO₂ fixation measured against rainforest-per-hectare baselines, reported as verifiable tonnes removed, not estimated offsets.
Biomass & biochar circularity
Spent biomass returns as biochar and feedstock to Segal Resources — closed loop, not landfill.
Green-H₂ integration
Hydrogen output feeds fuel cells, turbines, and the fusion-adjacent hydrogen economy the other programs draw on.
Oxygen-tolerant, high-yield, continuous hydrogenase activity at scale is unsolved at industrial TRL. Bench H₂ evolution is real and measurable; continuous economic production is the research frontier. We state the bench result and the frontier separately, and never dress one as the other.
Bioreactor OS
PBR control: light, temperature, gas exchange, culture density, and per-array H₂-yield optimization, mock-first telemetry today.
- Closed-loop light, temperature, and gas-exchange control
- Culture density and contamination monitoring
- Per-array hydrogen-yield optimization
- Anaerobic-window scheduling for hydrogenase activity
Drawdown Ledger
Verifiable carbon MRV — measurement, reporting, verification. The auditable book that proves tonnes removed, not estimated.
Bench Biohydrogen
Measured H₂ evolution from engineered strain vs control.
Bench PBR and strain showing measurable hydrogen evolution against a control culture — biophotolysis demonstrated, yield characterized.
Pilot PBR Array
CO₂ fixation rate benchmarked vs rainforest-per-hectare.
A pilot photobioreactor array measuring CO₂ fixation per hectare against a mature-rainforest baseline, under real operating conditions.
Continuous Biohydrogen
Sustained H₂ output from an oxygen-tolerant strain.
Move from batch evolution to continuous production — the oxygen-tolerance problem solved well enough to run without stopping. The frontier, marked as roadmap.
Carbon-Negative Firm Power
Verified drawdown + dispatchable H₂ electrons.
Reference engagement: verified net carbon removal paired with dispatchable hydrogen power — the coupled output the thesis promises.
Oxygen-tolerant hydrogenase
Hydrogenase is poisoned by the oxygen photosynthesis makes. Engineering tolerance — or decoupling the reactions in time — is the central bet. Bench evolution is real; continuous yield is not yet. A bet, named.
Sustained yield in dense culture
Light penetration, shading, and contamination cap areal yield as density rises. We measure where the curve bends to size real reactors.
Carbon MRV integrity
Drawdown only counts if it is measured, reported, and verifiable. We build the MRV first so the tonnes are auditable, not estimated.
No. Biophotolysis splits water with sunlight via algal enzymes, producing hydrogen and oxygen directly. Biomass is a by-product returned to Resources as biochar — not a fuel we combust.
Dense algal culture fixes atmospheric CO₂ as it grows; verified drawdown via the Drawdown Ledger exceeds process emissions. We hold net-negative as a floor and prove it with MRV, not estimates.
No. Measurable H₂ evolution at the bench is achieved. Continuous, economic production depends on oxygen-tolerant strains and is on the roadmap — stated as a research bet.
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