Scotland's Whisky Distilleries Are Now Feeding an Algae Revolution — and the Scottish Government Just Backed It With $3.3 Million
Scotland produces more than just world-renowned Scotch whisky. It produces, in staggering volumes, the industrial waste that comes with it — billions of liters of nutrient-rich liquid left over after the alcohol is extracted, typically worth little more than the cost of disposing of it. For most of the distilling industry's history, that byproduct has been a problem to manage rather than a resource to exploit. A University of Edinburgh spinout called MiAlgae has spent nearly a decade changing that equation, and the Scottish government has now made its most significant financial bet yet on the outcome: a £2.5 million ($3.3 million) injection from the Scottish National Investment Bank to push MiAlgae's commercial-scale manufacturing facility in Grangemouth across the finish line.
The investment lands at a moment when the global omega-3 supply chain is under real strain, the aquaculture industry is casting around for sustainable alternatives to wild fish oil, and the former industrial heartland of Grangemouth — scarred by the closure of a refinery that had run for over a century — is desperately trying to reinvent itself. MiAlgae sits at the intersection of all three pressures, and the government's move signals genuine institutional confidence in what the company has built.
The Problem With Fish Oil That Nobody Talks About Enough
To understand why MiAlgae matters, it helps to understand how omega-3 fatty acids — specifically DHA and EPA — actually end up in the food chain. Although fish oil is the traditional source of omega-3s, fish do not actually produce omega-3 themselves; they acquire these essential nutrients by consuming algae and smaller fish. The logic follows naturally: if algae are the original source, producing algae directly eliminates the middleman and all the ecological consequences that come with it.
MiAlgae founder and CEO Douglas Martin has been blunt about the state of wild fish stocks: "The sustainable limits of what you can catch out of the ocean at the moment have been reached. You can't physically catch any more out of the seas." That's not rhetoric — it reflects a documented global crisis. Approximately 90 percent of the world's wild fish stocks are either fully depleted or currently overexploited. Meanwhile, the aquaculture industry — humanity's fastest-growing food production sector — has been swallowing enormous quantities of those same wild stocks to produce the fish meal and fish oil it feeds to farmed fish. This creates a cycle that weakens the environmental case for farmed fish: as aquaculture expands, it adds pressure to wild fish populations that are already strained.
The math at MiAlgae's Grangemouth facility puts the scale of this problem in stark relief. The company reports that at full capacity, the facility will replace marine-sourced omega-3s equivalent to six billion fish per year. That's not a rounding error — that is a fundamental reshaping of where DHA comes from for entire supply chains. The company estimates that this fish-free alternative saves 30 tonnes of fish for every tonne of algae produced.
The Whisky Connection: Turning Pot Ale Into Protein
What Distillers Leave Behind
Scotch whisky production is, at its core, a fermentation and distillation operation. Malted barley gets mashed, fermented into a low-alcohol liquid, and then distilled to concentrate the spirit. Whisky production creates what is essentially an eight percent alcohol beer, from which the alcohol is extracted; the remaining 92 percent, produced in billions of litres annually in Scotland, is largely low-value waste. This liquid — known in the trade as pot ale — is nutrient-dense but has few cost-effective uses. Distilleries have long paid to process or dispose of it. For MiAlgae, it is the feedstock that makes everything work.
The challenge that has frustrated researchers for years has been cost. Growing algae on high-grade feedstocks makes the economics unworkable when competing against cheap wild fish oil. MiAlgae's breakthrough was recognizing that Scotland's most famous industrial byproduct — available in virtually unlimited quantities across hundreds of distilleries — could replace those expensive chemical inputs entirely. The company's solution is to use low-value industrial byproducts as the algae's food source, specifically the liquid waste from Scotch whisky distilleries.
The Fermentation Process
Inside MiAlgae's operation, the process has a logical elegance to it. MiAlgae pipes this nutrient-dense waste into massive 30,000-litre stainless steel bioreactors. Martin himself has described the process in terms that any homebrewer would recognize immediately. "It's a bit like brewing," Martin explains. "You take a very small number of algae cells and you take all the whisky byproducts and some other bits and you put them into these big stainless steel tanks and you let the algae feed on all of that nutritious goodness."
The company feeds its algae with the nutrient-rich byproducts from whisky in specifically designed fermentation vessels. The microalgae are then processed into commercial quantities of its marine omega-3 product. This undergoes rigorous quality testing before being packaged and delivered to customers in dry, wet, or supplement formats. The fermentation platform, meanwhile, recycles the whisky waste into clean water, which MiAlgae returns to the watercourse. Zero-waste is not just marketing language here — the bioreactors are powered by renewable energy, and once the algae biomass is harvested, the remaining water is purified and returned to the local watershed, while any residual organic matter is converted into green energy through anaerobic digestion.
The solid output — MiAlgae's commercial product, branded as NaturAlgae — is a dry powder. NaturAlgae is a dry powder with a high concentration of DHA and other oils that can be added to recipes for aquaculture and pet food. The ingredient is vegan, fully traceable, and has a significantly smaller footprint than conventional DHA production, which is sourced from fish oil.
From Edinburgh Lab to Industrial Scotland: MiAlgae's Journey
An Unlikely Origin Story
MiAlgae was founded in 2016 by Douglas Martin while he was pursuing an MSc in Synthetic Biology and Biotechnology at the University of Edinburgh. Martin was inspired to find a better use for algae after an algal bloom disrupted his work in the North Sea. That frustrating field experience turned into a founding insight: algae were not a nuisance — they were an underutilized biological resource. Martin co-invented the company's patented process and has since been recognized as a Forbes Under 30 honoree.
Edinburgh Innovations was instrumental in helping Martin develop and launch his business, winning the earliest grants and awards, and connecting him with investors. The company built its first operational site not in an industrial park but at a demonstrator facility in Balfron, near Stirling, where it proved the concept at meaningful scale. MiAlgae scaled up operations at Balfron, which eventually housed eight 30,000-litre tanks for growing algae. That demonstrator site was where the company validated its economics, its supply chain logistics, and the quality of its product before approaching larger investors.
Building a War Chest
The funding timeline tells the story of growing conviction in the technology. Following successful scaling at its demonstrator site in 2023, MiAlgae secured significant funding to build a new industrial-scale production facility. As of late 2024, the company had raised a total of £20 million, including a £14 million Series A round to accelerate commercialization and meet demand from the aquaculture, pet food, and human health sectors. The company's pioneering approach also gained international recognition in 2024 when it was shortlisted for The Earthshot Prize under the "Revive our Oceans" category, in recognition of its scale-up potential and ecological impact. The Earthshot Prize was founded by Prince William.
The company also established early-stage supply partnerships with Scottish distillers to lock in its raw material pipeline. A Scottish distillery announced a partnership with MiAlgae, which produces omega-3 from microalgae grown in nutrient-rich whisky effluent. Eden Mill was among those early collaborators. Eden Mill's chief executive Rennie Donaldson noted: "We are delighted to announce our long-term partnership with MiAlgae, making use of their advanced biotechnology to create sustainable omega-3 from our distillery's effluent waste." Even at that early stage, the numbers were not trivial: MiAlgae reported that in the space of six months, it had produced enough omega-3-rich microalgae to save 2.4 million fish from being caught.
Grangemouth: The Industrial Town That Needs a Second Act
The Refinery's Long Shadow
The decision to locate MiAlgae's commercial-scale plant in Grangemouth was not arbitrary. Grangemouth sits at the center of Scotland's industrial geography, and it has spent the past several years in economic pain. MiAlgae's factory will be situated on the site of a former oil refinery owned by Petroineos, which closed in April 2025 after over a century of operations, leading to nearly 430 job cuts. Some 400 workers at the Grangemouth oil refinery were made redundant when it stopped refining oil and became an imports terminal. The psychological weight of that closure on the local community — a place where generations of families had worked — is hard to overstate.
MiAlgae was the first project on the site of the former oil refinery at Grangemouth. That distinction matters politically and symbolically. It demonstrates that the transition narrative being pitched to Grangemouth workers — that green industry can replace fossil fuel industry — is not purely theoretical. The project is part of the Scottish government's Project Willow, which is aimed at turning Grangemouth into a green tech hub.
The Political Investment Behind the Investment
The funding picture around Grangemouth's transformation is layered. The initial £3 million that backed MiAlgae's groundbreaking came with £1.5 million from the Scottish Government's Grangemouth Just Transition Funding, matched by £1.5 million from the UK Government's Grangemouth Investment Taskforce. The broader funding context includes £14.5 million announced in the Chancellor's Budget to support Grangemouth's transformation into a low-carbon technology hub, Scotland's £25 million Grangemouth Just Transition Fund, and a pledge of £200 million from the UK Prime Minister from the National Wealth Fund for the site's overall development.
Now, the Scottish National Investment Bank has added a further £2.5 million directly to MiAlgae. The SNIB funding comes nearly a year after the startup secured £3 million from the UK government, as part of its £14.5 million pledge to transform Grangemouth into a hub for low-carbon tech and deliver future-facing jobs, as well as Scotland's £25 million Grangemouth Just Transition Fund. The layered government support — from the UK budget, the Scottish just transition fund, and now SNIB — reflects a coordinated industrial strategy rather than a one-off grant.
UK Energy Minister Michael Shanks marked the original groundbreaking with pointed language about intent: "Today we're taking another step forward as we back the first new project at the site, creating hundreds of new, decent jobs and attracting further investment in the area." Jan Robertson, director of Grangemouth Transition at Scottish Enterprise, added: "It's wonderful to see MiAlgae break ground on its first commercial-scale plant."
What the Grangemouth Facility Will Actually Do
Scale, Output, and Economic Impact
MiAlgae broke ground on the site in late 2025, with the facility enabling it to produce over 10 times more omega-3 than its current capacity. The numbers behind the operation are industrial in character. At full scale, the facility will recycle 36.1 million liters of whisky by-products annually and create hundreds of jobs in biotechnology, engineering and production. The plant is expected to create 310 new green jobs over the next five years and deliver an additional £53 million into the Scottish economy. The near-term job creation figure is more modest but still significant: the expansion will create almost 100 jobs over the next two years, helping in the town's recovery from recent closures.
Once fully operational, the facility will have the capacity to produce 3,000 tonnes of marine omega-3 annually. The facility has also been designed with long-term commercial ambitions in mind. Located close to key raw material suppliers and major customers, MiAlgae said the facility was designed with modular scalability, allowing it to meet growing demand from pet food and aquaculture brands. That modularity is strategic: the company has said the new site will be modular, expanding as demand grows with new facilities planned close to feedstock sources locally and abroad.
Market Targets and Commercial Opportunity
The immediate commercial focus at Grangemouth is the pet food industry. The company's current product is dried algae, bagged and shipped to aquafeed and pet food manufacturers as a drop-in replacement for wild fish ingredients. Pet food is the primary market for now, with aquafeed customers in the pipeline. The omega-3 ingredient targets pet food applications including dry, wet, and supplement formats.
The appeal to pet food manufacturers is grounded in what the ingredient does. NaturAlgae is a sought-after ingredient in the aquaculture feed and pet nutrition markets due to properties that promote healthy skin and coats, cognitive function and joint health. Beyond the established pet food market, the new facility will enable the company to address the increasing demands from aquaculture and pet food markets, which are seeking sustainable and ethical sources of marine omega-3s. MiAlgae is also exploring new markets including meat alternatives, nutraceuticals and livestock feed — sectors with significant global demand.
The site is located close to both key raw material suppliers and major customers, enabling MiAlgae to support a low-carbon supply chain for pet nutrition companies across the UK, EU, and United States. That geographic positioning matters: the Scottish Central Belt has dozens of whisky distilleries within a reasonable logistics radius of Grangemouth, giving MiAlgae a structural cost advantage that competitors trying to replicate this model elsewhere would struggle to match.
What the Earthshot Nomination and Global Recognition Mean
The Earthshot Prize shortlisting in 2024 was more than a trophy moment for MiAlgae. Being listed under the "Revive our Oceans" category placed the company in direct comparison with some of the most innovative conservation-linked businesses operating worldwide, and the attention that comes with it — from potential customers, from investors, and from policymakers — is not trivial. MiAlgae's own framing of its mission centers on "transforming whisky industry by-products into high-value Omega-3 ingredients, reducing pressure on marine ecosystems, preventing waste and creating a truly circular solution."
The circular economy framing resonates beyond Scotland. Across the aquaculture, pet food, and nutraceutical industries globally, buyers and brands are under increasing pressure to document and improve the sustainability credentials of their supply chains. A fully traceable, vegan, domestically produced omega-3 that leaves no wild fish in the water and no distillery waste in the drain is a product story that sells itself in those markets. MiAlgae's business model involves providing a more sustainable disposal service for Scottish distilleries by upcycling their co-products into a higher-value product — meaning the company is solving a cost problem for distillers at the same time as it solves a supply problem for omega-3 buyers. That dual value proposition is difficult to compete against.
Douglas Martin's Vision and the Broader Biotech Bet
Martin has been consistent in his language about what MiAlgae represents beyond its immediate commercial context. At the Grangemouth groundbreaking, he set out the stakes plainly. "Breaking ground at Grangemouth marks an exciting new chapter for MiAlgae," Martin said. "Our mission has always been to make a meaningful impact, tackling overfishing, reducing waste, and creating sustainable value from industrial by-products. This new facility is a huge step towards delivering that mission at scale, bringing new, high-quality green jobs to the local area, and helping Scotland lead the way in this exciting new biotech industry."
On the Grangemouth location specifically, Martin has spoken about the industrial heritage of the site as an asset rather than a complication. Martin said: "Grangemouth has incredible potential for us as we look to the next stage of our growth. This location offers an ideal position to support our scaling efforts and meet the increasing demand for our 'biotech for good' solutions, with the creation of green jobs across engineering, production, and research and development. The area has a rich industrial history, and we're proud to contribute to its evolution."
Martin has also stated clearly that MiAlgae is positioned to be central to Project Willow: "MiAlgae is at exactly the right stage of growth to contribute to the success of Project Willow. We are proven at scale, there is market demand for our product, and we're championing biotechnology in Scotland. We're looking forward to working closely with local stakeholders and the Scottish Government to make this vision a reality." The confidence in those statements is backed by the company's track record — this is not a startup in a lab pitching a concept, but a company that has already demonstrated its process at eight large-scale tanks in Balfron and is now building out at an order of magnitude larger.
Implications for the Whisky Industry's Waste Problem
Scotland's whisky distilleries generate waste at a scale that is genuinely difficult to comprehend. Whisky production generates billions of litres of liquid waste annually. Once the alcohol is extracted, the remaining 92 percent of the liquid is a low-value byproduct known as pot ale. Historically, distilleries have processed this into animal feed at low value, spread it on fields, or simply paid for its disposal. The partnership model MiAlgae offers changes the economics on both sides: distilleries gain a more sustainable, higher-value outlet for their waste, and MiAlgae gains access to essentially free, high-volume feedstock.
What makes the whisky connection particularly durable is its geography. The concentration of distilleries in the Scottish Highlands and Central Belt means that MiAlgae's Grangemouth facility sits within a natural catchment of raw material. MiAlgae repurposes whisky industry by-products to grow microalgae as a sustainable, cost-effective alternative to fish-derived Omega-3s. The Grangemouth site is ideally located near distilleries and MiAlgae's customers in the Central Belt of Scotland, which will help it scale its sustainable production model. As the company grows, it has signaled it will replicate this model wherever large-scale fermentation waste streams exist — distilleries are only the first category.
The Road Ahead: Can Scotland's Algae Industry Scale to Global Significance?
The SNIB's fresh £2.5 million is not a destination — it is the latest step in a longer trajectory. MiAlgae has now assembled a funding stack that includes government grants, transition funds, Series A venture capital, and development bank support, totaling north of £20 million. The Grangemouth facility is the first full commercial expression of that investment, and its performance will set the template for what comes next. The plant was scheduled to open in the second quarter of 2026 and was expected to recycle 36.1 million litres of whisky byproducts, leading to a ten-fold increase in production capacity.
The competitive landscape is shifting quickly. Other companies — including Algiecel in Denmark — are pursuing similar paths to fish-free omega-3 at scale, which means MiAlgae's head start in feedstock partnerships, patented process technology, and government relationships matters now more than it will in five years. The race to prove that algal omega-3 can compete on cost and volume with wild fish oil is genuinely on, and the winner will likely be whoever can most rapidly secure scalable, low-cost feedstocks. Scotland's whisky industry, producing billions of liters of pot ale annually with no good home for it, is a structural advantage that other biotech startups in other countries simply do not have.
For Grangemouth and the workers who lost jobs when the Petroineos refinery shut down, MiAlgae is the most concrete proof yet that the transition from fossil fuel economy to green industrial economy can mean real employment rather than political promises. The first phase of the Grangemouth site is estimated to create over 100 green jobs once operational, and the planned expansion will allow MiAlgae to continue to offer retraining opportunities for workers transitioning from the oil and gas industry. That pipeline from refinery skills to biotech production is not accidental — Grangemouth has the engineering workforce and the industrial infrastructure, and MiAlgae has the process that needs both.
Scotland has long exported its distilling heritage to the world. If MiAlgae succeeds at the scale its Grangemouth facility implies, the country will soon be exporting something else made from the same raw material: a cleaner future for the oceans that feed it.
