Technology · Blue bioeconomy / Marine biotech

CO2 valorization via microalgae

Capturing industrial CO2 emissions using microalgae to produce valuable biomass, biofuels, and bioplastics.

Risk: medium Carbon removal US · EU · CN · IN Science: why it works → verified 2026-06-24 · 8 Sources (0 independent)

1 · What it gives

Microalgae are among the fastest-growing photosynthetic organisms on Earth, capturing CO2 up to 50 times more efficiently than terrestrial plants. CO2 valorization via microalgae couples biological carbon capture and utilization (CCUS) with bioproduction by feeding industrial exhaust gases directly into algal cultivation systems, fixing roughly 1.8–2.0 kg of CO2 per kg of dry biomass. The resulting biomass refines into a spectrum of products, from low-volume high-value nutraceuticals and pigments to high-volume biofuels, bioplastics and animal feed. Productivity ranges from 10–30 g/m²/day in open ponds to 50+ g/m²/day in closed photobioreactors, with economics that swing entirely on the target end-product.

The key directions of CO2 valorization via microalgae are:

Carbon Capture & Utilization (CCUS): routing industrial flue gas into algal cultures, fixing 1.8–2.0 kg of CO2 per kg of dry biomass while abating point-source emissions.
High-Value Bioproducts (Astaxanthin, Omega-3): extracting premium pigments and oils — the low-volume revenue stream that funds scale-up.
Commodity Biofuels & Feed: converting lipids into bio-crude and proteins into animal feed at 10–50+ g/m²/day productivity.
Gigaton-Scale CDR: coastal open-pond infrastructure on non-arable land built purely for verifiable carbon dioxide removal.

Sectoral value chain#

[Gas capture] ──> [Cultivation] ──> [Harvesting] ──> [Extraction]
                                  │
                          (Carbon credits)
                                  │
                                  ▼
[Bioproducts] <─── [Refining] <─────┘

Value chain levels#

Level	Description	Key inputs/outputs
1. Gas conditioning	Capturing and scrubbing industrial flue gas	In: Exhaust gas. Out: Clean CO2.
2. Algal cultivation	Growing microalgae in photobioreactors or open ponds	In: Clean CO2, sunlight. Out: Wet algal biomass.
3. Harvesting	Dewatering and concentrating the algae	In: Wet algal biomass. Out: Algal paste.
4. Extraction	Cell disruption to isolate target compounds	In: Algal paste. Out: Lipids, proteins.
5. Refining	Converting lipids and proteins into end products	In: Lipids, proteins. Out: Bio-crude, pigments.
6. Commercialization	Selling bioproducts or carbon credits	In: Bio-crude, pigments. Out: Revenue, CO2 credits.

Cross-cutting technologies of the sector:

Photobioreactors (PBRs): closed tubular or flat-panel systems with precise light and contamination control, reaching 50+ g/m²/day.
Continuous Harvesting (Centrifugation/Flocculation): energy-efficient dewatering of >95%-water biomass — the sector’s largest operating-cost lever.
Strain Engineering (CRISPR Cyanobacteria): editing fast-growing strains to lift lipid yield and tolerance to raw flue gas.

2 · What it replaces 2 · matched by industry

D1E4	Biochar as a composting and manure additive, a feed additive and a low-cost sorbent for water and soil treatment — instead of coal-based activated carbon, chemical odour and ammonia binders, and part of clay toxin binders Replaces: Coal- or fossil-based activated carbon for low-demanding sorption duties; chemical odour/ammonia control in litter and compost; part of the …	AGROCHEM
D1E4	Biochar made by clean pyrolysis of crop, forestry and processing residues — used as a soil amendment and sold as durable carbon removal — instead of open burning, dumping or landfilling of those residues Replaces: Open burning of straw, husks, shells and prunings; dumping and landfilling of processing residues; traditional earth-kiln charcoal making …	AGROCHEM

3 · How to implement 6 steps

1
Strain selectionStrains & cell lines
Identifying fast-growing, robust cyanobacteria and microalgae strains tolerant of industrial flue gas.
Who can do this step matched automatically
Beijing Shougang LanzaTech China
20 tons per day industrial scale
“Breakthrough Discovery to Replace the Barrel with Synthetic Biology, Addressing One of the Largest Carbon Emitters in the Chemical Industry”
Changjin Bio 昌进生物 (Shanghai) China
“It specializes in synthetic biology, focusing on the research, development, and industrialization of microbial biomass proteins and recombinant milk proteins.”
Fermbox Bio India
400 kilolitres industrial scale
“Fermbox Bio is a Synthetic Biology Research and Manufacturing company developing and delivering sustainable Synbio products with improved scalability and speed.”
Algal Bio Japan
industrial scale
“2026-09-02 [The Algae Foundry: Algal Bio’s Long Bet on Industry That Doesn’t Exist Yet - Growthstock Pulse — Algal Bio positions itself as an end-to-end “algae biofoundry” that …”
CHITOSE Japan
industrial scale
“STABLE CELL LINE DEVELOPMENT SERVICE”
OnDemandBio South Korea
industrial scale
“OnDemandBio is a South Korean deep-tech startup specializing in precision fermentation and synthetic biology to produce high-value biomaterials for the food, healthcare, and …”
2
Lab cultivationFermentation & cultivation
Optimizing light cycles, nutrient delivery and CO2 injection rates at bench scale.
Who can do this step matched automatically
FORNATURES South Korea
industrial scale
“The company specializes in biological carbon capture using microalgae-based bioreactors.”
Green Earth Institute (TSE Growth) Japan
pilot scale
“Their mission emphasizes environmentally friendly, circular economy practices, and reducing fossil reliance, with a vision to drive biomanufacturing innovation.”
Beijing Shougang LanzaTech China
20 tons per day industrial scale
“Beijing Shougang LanzaTech is a Chinese biomanufacturing company specializing in carbon capture, utilization, and storage (CCUS) by converting industrial waste gas into ethanol and …”
Changjin Bio 昌进生物 (Shanghai) China
“With expertise in both biomass fermentation and precision fermentation, Changing Bio produces tasteful and versatile non-GMO mycoproteins, as well as a series of dairy proteins, …”
Fermbox Bio India
400 kilolitres industrial scale
“Fermbox Bio is an active Bengaluru-based synthetic biology and precision fermentation company founded in 2022 by Subramani Ramachandrappa and Preeti Dharmagoudar.”
3
Pilot PBRs
Testing closed-loop cultivation attached to real industrial flue-gas streams.
4
Downstream processingPurification & downstream
Scaling energy-efficient dewatering and lipid-extraction methods to cut operating cost.
Who can do this step matched automatically
Tsukishima Kikai Japan
✓ ISO 9001
“Crystallization and refining: In-house developed DP Crystallizer and Oslo Crystallizer for tailored crystallization and refining processes; integrated purification units combining …”
Parry Nutraceuticals (EID Parry) India
✓ ISO 9001 industrial scale
“Minimal processing that preserves essential nutrients and phytochemicals via their PS 2.0 downstream process, avoiding cell damage and nutrient loss.”
Algal Bio Japan
industrial scale
“・Equipped with comprehensive downstream processing capabilities (Concentration, sterilization, and drying)”
Algalif Iceland
“• HACCP principles are employed in our downstream processing”
5
High-value sales
Commercializing astaxanthin, omega-3s and specialty pigments to fund the platform.
6
Gigaton-scale CDR
Deploying massive coastal pond infrastructure dedicated to permanent CO2 sequestration.

4 · Who delivers

Matched suppliers (matched automatically)

ADM / Sophie's BioNutrients	Singapore	Producer	active
Allmicroalgae	Portugal	Research / RTO	active

In the services and supply catalogue 2 · paid service

Enzymes & biocatalysts · Upstream — fermentation & cell culture

Leading companies and institutes (from the brief)

Company / Institute	Country	Key products / platforms	Tech features	Status 2026
Viridos	🇺🇸 USA	Engineered algae	Genomic lipid-yield maximization	discontinued (Chapter 11; assets sold 2025)
Brilliant Planet	🇬🇧 UK	Coastal ponds	Open-pond ocean carbon removal	commercial
Subitec	🇩🇪 Germany	Flat-panel PBR	Airlift photobioreactor hardware	commercial
Fermentalg	🇫🇷 France	Algal oils	CO2 sinks and omega-3s	commercial
ENN Group	🇨🇳 China	Industrial CCUS	Flue gas to microalgae	commercial
Reliance Industries	🇮🇳 India	Algae bio-crude	Scale-up of algae-to-biofuels	commercial

5 · Rules & route to market

Route into Russia / EAEU: AGROCHEM · Ministry of Agriculture (Minselkhoz)
about 1-2 years incl. registration trials
Information, not legal advice — confirm the procedure for your product. (2026-10-06)

United States

The US has pivoted from its algae-to-biofuels era (funded by DARPA and DOE) toward genomics-driven lipid maximization and direct carbon crediting.

genomic strain design, carbon crediting, biofuel legacy#

Viridos lipid engineering: advanced genomics maximizing per-cell oil yields for drop-in biofuels.
DOE/DARPA legacy: decades of public funding that built US strain libraries and open-pond know-how.
Voluntary carbon markets: monetizing fixed CO2 as verifiable removal credits.

European Union

The EU leads in high-value valorization and closed-system engineering, extracting premium nutritional and cosmetic compounds from captured CO2.

photobioreactor engineering, high-value extraction, coastal CDR#

Subitec flat-panel PBRs: airlift reactors for contamination-controlled, high-density cultivation.
Fermentalg algal oils: omega-3 oils and CO2 sinks from proprietary strains.
Brilliant Planet open ponds: coastal-desert seawater raceways aimed at gigaton-scale carbon removal.

China

State-owned energy and chemical groups are piloting massive microalgae CCUS facilities bolted directly onto power plants and refineries to serve China’s carbon-neutrality goals.

industrial CCUS, flue-gas integration, state pilots#

ENN Group CCUS: flue gas from chemical refineries routed directly into microalgae cultivation.
Sinopec pilots: power-plant-integrated algae units for point-source carbon abatement.
2060 carbon-neutrality mandates: national targets pulling algae CCUS into heavy-industry decarbonization.

6 · Money: tenders & grants

Grant	Improving biomass flows for a sustainable and circular bioeconomy European Commission · EU	Sep 22, 2027 341 days
Grant	Open topic: Using the Circular Cities and Regions Initiative to strengthen urban manufacturing in support of … European Commission · EU	Apr 8, 2027 174 days

7 · Tech stack & innovations

The core bottleneck is the cultivation system and the energy cost of recovering dry product from a culture that is often more than 95% water.

Photobioreactors vs Open Ponds:
- Closed PBRs (tubular or flat-panel) give precise control and 50+ g/m²/day but are capital-intensive (above $500K per hectare).
- Coastal open raceways use free seawater and sunlight — cheap enough for gigaton-scale CDR but vulnerable to contamination and weather.
Downstream Processing:
- Centrifugation and flocculation dewater the wet paste; ultrasonic and enzymatic disruption release lipids and proteins.
- Energy-efficient dewatering is the single largest operating-cost lever for commodity products.
Strain Engineering:
- CRISPR-edited cyanobacteria raise growth rate, lipid fraction and tolerance to SOx/NOx in untreated flue gas.
- Robust strains cut the need for expensive gas pre-conditioning steps.

Sources 8 · 0 independent · 8 producer sites

Producers' own sites 8

Pond technologies producer checked 2026-06-16 · link not kept
Brilliant planet producer checked 2026-06-22 · link not kept
Viridos producer checked 2026-04-28 · link not kept
Fermentalg producer checked 2026-05-05 · link not kept
Subitec producer checked 2025-11-27 · link not kept
Enn group producer checked 2026-06-24 · link not kept
Reliance industries producer checked 2026-06-20 · link not kept
Cyanocapture producer checked 2026-06-03 · link not kept