The company's filters, designed for ultra low sulphur diesel (ULSD) and biodiesel blends, have a two-stage single pass design and efficiently remove emulsified water. ULSD and biodiesel blends are mandated by governments in North America and the European Union to reduce diesel's environmental impact. Puritas Energy's fuel polishing technologies address the challenges posed by the removal of sulphur from diesel, which led to increased water absorption and microbial contamination.