Effectiveness of water guard as a disinfectant in water treatment.

This research, a direct result of a widespread doubt on the part of the Engineer's Registration Board over the rising tides of a number of unscientifically proven spicy commercial claims, slogans and advertisements running on the local media in promotion of water guard to the general public in Tanzania, was carried out by taking water samples in Dar-es-Salaam city and applying water guard accordingly. The objectives were to determine the water guard chemical composition, its water treatment effectiveness on waters from different sources drawn from the Dar-es-Salaam city suburbs. The study also sought to establish water guard optimum dose applicable in treating water from different sources, the effects of temperature, pH and organic content on its efficiency. The laboratory findings revealed water guard microorganism killing effectiveness in various water samples; however, the strength deteriorates after an exposure for 14 days at 20° and 30° C. New doses of 0.26 and 0.13 g/1 were designed for treating a variety water samples specified in the falling contents of this research study. Its disinfection mechanism delays at low temperature, high pH and organic content with a range between 2.5- lOg/1. The researcher, therefore, recommended a new dose and the use of marked caps in administrating water guard on a variety water samples, need to keep water guard bottles closed all round, and also to be patient while applying the disinfectant in waters with low temperature and higher pH levels.