Dodecyldimethyl ammonium chloride

Dodecyl dimethyl ammonium chloride (DDAC) has seen limited use in recreational water. The primary advantage of DDAC is that it is efficacious at the same use concentration as ADBAC but has a greatly reduced tendency to foam. DDAC is used at 2 to 4 ppm active. [Pg.154]

Sodium bromide is occasionally employed as an algicide. Typically 3.5 ppm of sodium bromide added. The bromide is converted to hypobromous acid by the subsequent addition of a fast dissolving chlorine biocide sufficient to achieve 10 ppm FAC. This temporarily converts the pool to a bromine system. The pool is reconverted to chlorine by subsequent high doses of chlorine release agents. [Pg.154]

Silver and silver salts have occasionally been employed as algicides. Silver based algicides have shown limited efficacy against mustard algae and are frequently cited as the source of stains of pool surfaces. [Pg.154]

Carter, G. and Hinton, A. J., 1977. Water treatment for controlling growth of algae employing biguanides. U. S. Patent No. 4,014,676. Dychdala, G. R., 1991. Chlorine and Chlorine Compounds. In S. S. Block (ed.). Disinfection, Sterilization and Preservation, 4th edn. Lea and Febiger, Malvern, Pennsylvania, pp. 131-151. [Pg.156]

DIS/TSS-12, Efficacy Data Requirements Swimming Pool Water Disinfectants. US Environmental Protection Agency, [Pg.156]

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