 Management to Host Conference Call on Friday, May 13, 2022, at 8:00 a.m. ET BALLERUP, Denmark , May 10, 2022 PRNewswire -- LiqTech International, Inc. NASDAQ: LIQT, a clean technology company that manufactures and markets highly specialized filtration products and systems, has scheduled a conference call to discuss its first quarter 2022 financial results for the period ended March 31, 2022 on Friday, May 13, 2022, at 8:00 a.m. 