A new, environmentally friendly isothiazolone biocide has been developed. The new biocide, which recently won a "Green Chemistry" award, is highly effective in controlling the growth of algae in cooling water. Laboratory tests demonstrate broad-spectrum algicidal properties against a range of green algae and blue-green bacteria (cyanobacteria). Field trials, conducted in several regions, confirmed the efficacy of the new biocide at low use levels. The new biocide is fast-acting and controls algal grow thin recirculating cooling water as well as algal biofilms on tower decks.
98-06: A New Biocide for Control of Algal Biofouling in Cooling Towers
K. Mark Wiencek, Terry M. Williams, Robert F. Semet, Rohm and Haas Company