Liqtech International, Inc.
A clean-technology company based in Ballerup, Denmark, that builds filtration systems around silicon carbide — one of the hardest man-made materials, originally pursued in the quest for artificial diamonds. Its ceramic membranes and diesel particulate filters clean industrial wastewater, ship exhaust, and soot from diesel engines. Founded in Copenhagen around the year 2000, it took the name LiqTech International in 2011 as it grew into global markets.