The world’s growing appetite for energy needs a fossil-fuel diet.

Algal biofuel provides an answer for industries that haven't yet decarbonized.


Humanity’s appetite for energy continues to grow unabated. Estimates suggest that we’ll consume 50% more energy by 2050 than we do today. The combustion of fossil fuels constitutes nearly a third of this increase. As a major contributor to greenhouse gases, this growing demand for energy is changing our climate in unpredictable and dangerous ways.

Progress has been made in the transition to renewable energy, such as with solar and wind power. But these can’t address the high-energy density requirements for heavy transportation, such as aviation, commercial trucking, rail, and marine shipping. Liquid fuels will remain the predominant energy source for these industries for the foreseeable future.

With no viable solution for decarbonizing these industries, finding a sustainable path forward is critical to meeting climate-change mitigation goals. The dilemma is how to slow and ultimately halt rising atmospheric temperatures and air pollution while at the same time meeting the energy needs of a growing global population.

Our solution

We believe that high-energy density algae biofuel for heavy transportation is part of the answer. By establishing this non-resource intensive, breakthrough solution deployed at a global scale, we can recalibrate heavy transportation toward a more sustainable future and reduce greenhouse gas emissions by nearly 70%.

In partnership with ExxonMobil and others, we are developing an agronomic platform to produce algal biofuels, working with the world’s largest energy producers and users to deploy it at scale. By capitalizing on well-established regulatory programs that incentivize adoption, such as the RFS and LCFS in the US, and the Renewable Energy Directive in Europe, we can make the adoption of algal biofuels more attractive and establish a more level playing field.

With sunlight, CO2, salt water, and a few molecular tweaks, we're good to go!

By harnessing the power of photosynthesis, we’re producing biofuels that recycle the atmosphere’s excess amounts of CO2.
Most gasoline sold in the US today contains some level of first-generation biofuel (ethanol from corn or biodiesel from soy). But yield improvements and productivity gains of these terrestrial crops are plateauing. And as energy demands increase, food security and resource constraints (land and water) pose significant challenges for continued production of first-generation biofuels.

This is where the advantages of microalgae kick in. Microalgae are excellent at converting CO2 and sunlight into oil-rich biomass, especially when compared to land-based crop plants like oil palm and soy. By adapting microalgae to function as cell factories producing energy-dense oils that can easily be refined into renewable diesel and jet fuel, we can reduce greenhouse gas emissions by 70%.

We utilize sunlight and atmospheric CO2 to grow the algae for oil as a replacement for burning fossil fuels (which release new carbon previously stored underground). Additionally, by farming in saltwater on marginal land, we avoid competing with resources required for food production, such as arable farmland and freshwater. We estimate that at commercialization, the productivity of engineered microalgae will be 20x times greater than any existing terrestrial crop. This dramatic advantage underpins the scalability of our technology.

With our genomic expertise, improving microalgae’s oil output is now a reality.

We have already demonstrated a 5-10x improvement in bio-oil productivity over natural strains in an outdoor real-world setting.
And we plan to improve well beyond that.

One of the main challenges in pushing productivity levels in microalgae is the inverse relationship between biomass growth and oil output. Our 2015 discovery of the “lipid switch” in microalgae (published in 2017) that enables both the growth and production of lipids was a seminal breakthrough. With further advancements in genome sequencing, bioinformatics, and precise gene-editing technologies, we are improving microalgae’s oil productivity even further.

As we move our achievements in the lab to CAAF, our outdoor pilot production facility in the California desert, we are using our microbiology expertise to address the challenges of a real-world production setting. Much like a farmer, we need to manage much more than just our crop. This includes pests, weeds, predators, beneficial bacteria, etc., all of which contribute to the success or failure of the production process. Additionally, we continue to push our analytics, bioinformatics, and strain development teams to match the right strain of microalgae with the right conditions.

Viridos’ vision is to lower the cost of algae biofuels through higher oil productivity and advanced agronomy. As we move closer to commercialization, we are developing the systems and processes that will enable our partners to deploy desert-based farms thousands of acres in size. This will be the tipping point at which algae biofuel becomes an essential, scalable, and cost-competitive tool to mitigate climate change.

There is no greater urgency today than addressing climate change.

Algal biofuel provides the solution for industries that have no path to decarbonization.
Change is hard. But we believe that the biotechnology and agronomic expertise we are deploying to create algae biofuels will make the transition to sustainable energy for aviation, commercial truck, and marine shipping a change worth making.

These are the reasons why some of the world's largest companies are joining us to make algal biofuels a reality:

Carbon intensity

Viridos’ algal biofuel delivers a 70% reduction in GHG emissions over the fossil fuels it displaces. And sourcing renewable energy for the operations lowers the carbon footprint of algal biofuels even further.

Minimizing freshwater consumption

Viridos’ algal strains are grown in brackish or salinated water, minimizing the need for freshwater. Avoiding competition for valuable freshwater resources reinforces the sustainability of the algal biofuel production process.

Preserving farmland

Arable land in desirable climates with adequate water supply is increasingly scarce. Viridos’ deployment partners will farm microalgae without the use of freshwater in desert locations preserving valuable land for food production, reinforcing global food security.

Optimizing operational footprint

The acreage required for growing microalgae is less than a tenth of that needed for other crops used for biofuels, such as corn, palm, and soy, making the scalability of producing biofuel more viable.

Ecosystem compatibility

Our algae are natural strains that we genetically engineer to enhance biomass and lipid productivity. We use cutting-edge science to select and develop the strains and then carefully monitor how they fit in the natural ecosystem, ensuring ecological harmony.

Facilitating adoption

By creating a "drop-in" algal biofuel that is not subject to blend walls, we create greater adoption with a product that can be deployed without high conversion costs while dramatically reducing carbon emissions.

Sustainable production

Crude oil is a complicated mixture of hydrocarbons with varying composition, heavy metal, and sulfur impurities that require extensive refining. Our microalgae produce clean plant oils that can be easily converted to fuel without extensive processing.

Right chemical composition

Heavy transportation requires diesel or jet fuel which is only a small fraction of the composition of crude oil. Our algae oil is predominantly comprised of carbon chain lengths that can be converted with minimal undesirable refining byproducts into the desired drop-in jet or diesel fuel.

Maximizing value

In addition to oils, farming microalgae also produces protein and carbohydrate co-products. Capturing and converting these valuable outputs enables us to minimize waste, seed other sustainable business opportunities, and generate additional revenue.

Synergies with future technologies

When Direct Air Capture (DAC) becomes available, it can be used as feedstock for growing Viridos microalgae. This can enhance the viability of DAC, especially as initial units may not have concentrations to enable efficient underground sequestration, whereas Viridos microalgae thrives on lower CO2 concentrations.

At CAAF, we’re converting our achievements in the lab to the real world.

Ensuring our production systems are tuned to the context they operate in, we’re making algae biofuels a scalable reality.

With the support of ExxonMobil, Viridos developed the California Advanced Algal Facility (CAAF) in the Imperial Desert in 2018 as the initial pilot facility to test and farm optimal algae strains to move us toward commercialization.

CAAF represents the harshest and most realistic outdoor testbed/pilot environment where strains created by our scientists in the La Jolla lab are fully tested. Our evaluation work at CAAF informs upstream scientists how strains should be engineered, as well as identifies traits, pathways, and improvements that would not otherwise be identified with strains tested in a laboratory setting. This testing also provides an opportunity to inform the cultivators and system’s engineers on how best to design production systems and operations to transition lab productivity to the field at an ever-increasing scale.

In addition to providing input on strain development and productivity, CAAF provides a testbed for optimization of operations and systems in scaled conditions. Assessment of operational practices at pilot scale informs site-design, strain improvement, harvesting, water recycle practices, nutrient management, CO2 entrainment, novel reactor design, and all other aspects of algal cultivation. Essentially, CAAF is a readiness platform for ensuring that strains, systems, and operations are ready for primetime production of algal biofuels. Beyond biofuels, CAAF continues to function as Viridos’ piloting facility for scale in which all aspects of algal cultivation and practices can be evaluated, providing vital input to research and development of practices, systems, operations, strategies, and regimes related to algal cultivation. In addition to R&D potential, CAAF also functions as an ideal production testbed for developing novel strategies for carbon capture and decarbonization that may then be deployed for co-localization or leveraged as a part of the future decarbonization economy.

Algae biofuels are just the beginning.

We are committed to addressing sustainability using our algae bioengineering platform.

With deep-rooted genomic and algal optimization expertise, intellectual property, and the ability to translate innovation from the lab to real-world production settings, we have opportunities that complement our core algae biofuels.

Potential examples include:

Optimization of use of the residual carbohydrate and protein rich biomass after algae oil extraction – a valuable and sustainable resource with potential uses as low carbon fuel, feedstock, or animal feed
Bioengineering of microalgae to suppress methane emissions in ruminants
Replacement of seafood protein with sustainably grown microalgae protein
Replacement of fish oils, which are really algae oils, with sustainably grown algae oils
Biopolymers from microalgae
Application of our photosynthetic efficiency optimization to terrestrial crops
These are only a few of the areas where Viridos is addressing climate and sustainability challenges. As we move closer to our initial deployment of algal biofuels, our team of scientists and engineers are developing more advanced bioengineering tools and knowledge to create new products and processes that will support a sustainable bioeconomy.