Meet an Unreasonable Venture

Celtic Renewables

Repurposing organic waste into high value sustainable products and biofuel at scale

Mark Simmers

CEO at Celtic Renewables

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celtic-renewables.com

Employees 21–50

Headquarters Edinburgh, Scotland, United Kingdom

Celtic Renewables is commercialising a patented clean technology, developed and owned by the company, which converts low value materials into high value solvents using an innovative adaptation of a proven industrial process – ABE (Acetone, Butanol and Ethanol) Fermentation. The company's mission is to be the world leader in ABE fermentation as a global sustainable industry.

The annual global demand for these bio-based solvents (which displace fossil-fuel equivalents) is millions of tonnes, and the uses of these solvents touch almost every aspect of everyday life, in sectors such as personal care, cosmetics, food and industrial manufacturing.

Globally there are billions of tonnes of low-value biological materials which are suitable for the Celtic Renewables process, giving the potential to completely displace fossil fuel equivalents in the future - a global imperative.

Energy & Environment

Notable Achievements

Raised over £65m of early-stage funding
Developed a first-of-a-kind manufacturing plant in Scotland
Attracted global media coverage for its compelling value proposition

Currently Operating in Four Regions

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Press Mentions

March 21, 2025

First Minister visits Celtic Renewables’ Grangemouth bioethanol plant

Celtic Renewables is making significant strides in sustainable energy with its Grangemouth bioethanol plant. The First Minister's visit highlights the company's commitment to innovation and...

Read on Biofuels International »

November 21, 2024

Celtic Renewables Dispatches First Shipment Of Sustainable Biochemicals

Celtic Renewables has achieved a remarkable milestone by dispatching its first shipment of sustainable biochemicals, marking a significant advancement in green technology. This groundbreaking...

Read on build_scotland »

November 19, 2024

Scottish biorefinery sends world’s first tanker of green chemicals

Celtic Renewables proudly achieved a milestone by sending the world's first tanker of green chemicals from its Scottish biorefinery. This groundbreaking accomplishment showcases the company's...

Read on Biofuels International »

May 17, 2024

Celtic Renewables in latest crowdfunding boost

Scottish company Celtic Renewables successfully launches crowdfunding campaigns to support their innovative green chemical projects. The company's sustainable approach to biofuels and chemicals...

Read on Biofuels International »

May 15, 2024

Celtic Renewables starts up another crowdfunder

Celtic Renewables, a Scottish biofuel company, has successfully started a new plant to convert whisky by-products into biofuel. This innovative process not only reduces waste but also provides a...

Read on businessInsider »

May 15, 2024

Scottish green chemicals firm launches crowdfunding campaign | Envirotec

Scottish green chemicals firm Celtic Renewables launches a crowdfunding campaign to support their innovative biofuel production from whisky waste. The company successfully starts up a new plant,...

Read on Envirotec »