LiqTech International, Inc. is a clean technology company, which engages in the provision of gas and liquid purification products by manufacturing ceramic silicon carbide filters. It operates through the following segments: Water, Ceramics, Plastics, and Other. The firm specializes in ceramic membranes for liquid filtration systems and diesel particulate filters (DPFs) to control soot exhaust particles from diesel engines. The company was founded by Lasse Andreassen on July 1, 2004 and is headquartered in Ballerup, Denmark.