Tech Track 100

Its filtering technology efficiently removes excess water from biofuel production, increasing fuel purity while saving energy and reducing carbon emissions. The firm has operations in the UK, Canada and America, and its technology has been installed in 13 plants worldwide, including in Spain, Germany, America and Guyana. Founder and chief technology officer Stephen Blum, 59, established the company in 2000 and now heads up its Membrane Centre of Excellence in Calgary, Canada. Gillian Harrison, 46, has run the company since 2009. It is backed by private investors.

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Company details
CompanyWhitefox Technologies
ActivityIndustrial membrane solution developer
LocationCentral London
Latest sales £000s5,687

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* supplied by company † annualised figure