ANIONIC COMPATIBLE QUAT?

摘要

Sunlight exposed cooling towers can develop significant algae-related fouling problems. Algal mats and stringers visually indicate an ineffective microbiological program and increase oxidant demand reducing the effectiveness of oxidizing biocides. In addition algal fouling will often block tower fill reducing tower efficiency. The use of oxidizing biocides for algae control frequently requires operating at an oxidant concentration higher than desired from a corrosion perspective. In addition, most non-oxidizing biocides are designed for bacterial rather than algal slime control. Thus the use of supplemental algaecides is necessitated. This paper shows that optimized quaternaries can provide excellent algaecidal efficacy while at the same time providing reduced foam and anionic interactions that have typically dictated the use of special care when applying quats to cooling water systems. Bardac~R LF [(dioctyldimethyl ammonium chloride (DODMAC)] was developed to dramatically improve algae control in cooling systems using conventional corrosion and deposit control chemical programs. This paper demonstrates the excellent algaecidal activity of DODMAC along with its low foam and excellent anionic compatibility relative to traditional quaternaries.