Brözel, Volker SiegfriedCloete, Thomas Eugene2008-01-092008-01-091991-01Brözel, VS & Cloete, TE 1991, 'Fingerprinting of commercially available water treatment bactericides in South Africa', Water SA, vol. 17, no. 1, pp. 57-66. [http://www.wrc.org.za/publications_watersa]0378-4738http://hdl.handle.net/2263/4166Eighteen dominant isolates from water-cooling systems were exposed to 50mg/l of commercially available bactericides, and the kill percentage was determined after 6 h. Application costs of all bactericides giving an average kill percentage of over 90%, were compared. Low cost bactericides were re-evaluated at cost-equivalent concentrations. Dichlorophen, sulphone, a thiocarbamate and biphenol performed best, killing the full spectrum of isolates cost-effectively. Certain expensive products performed rather poorly, e.g. isothiazoline and MBT. This study highlights the selective action of many bactericides and the inherent resistance of bacteria to a number of different bactericides. This implies the importance of matching bactericides to the dominant bacteria in systems.533750 bytesapplication/pdfenWater Research CouncilWater-cooling systemsCommercially availabilityCost effectivenessIsolatesBactericides -- Cost effectivenessCommercial productsSewage -- Purification -- South AfricaArticle