Fecal coliform bacteria normally live in the digestive tracts of humans and other warm-blooded animals. As such, they are excreted in solid wastes, and are thus present in septic tanks and manure piles. This can pose a problem in areas near bodies of water, since leaky septic tanks and manure run-off can cause the bacteria to enter the water supply. Although these bacteria are not necessarily h...

Abstract: The objective of this study is to assess the potential for potable water savings by using rainwater as well as the sizing of rainwater tanks in houses in some cities in the world. Daily rainfall data for thirteen cities located in different countries were used. Different catchment areas, number of residents, potable and rainwater demands were considered in order to assess their impact...

background: water fl uoride level is unknown in many regions of iran. besides, only few noncontrolled studies world-wide have assessed the effect of water fl uoride on dental fl uorosis and caries. we aimed to measure the fl uoride level of 76 water supplies in 54 cities and evaluate the effect of fl uoride on dental caries and fl uorosis in a large multi-project study. materials and methods: i...

Thermal performance of a solar water heater mainly depends on the thermal stratification. Thermal stratification in solar water tanks is essential for a better performance of energy storage systems where these tanks are integrated. In this research work, the performance of a solar water heater with a mantle heat exchanger is investigated experimentally. The heat exchanger is assessed for a rang...

A bacterial-based bioremediation product, LakeRelief™ by Novozymes (Waterguru LakeRelief, 2011), was tested in a series of experiments between October 2008 and March 2009 to evaluate its suitability as a short-term intervention technique to reduce algal blooms in the Swan-Canning River system. Results from fibreglass tank experiments (1100 L) suggested that the product did not actively attack a...

In this work, CFD is used to simulate the flow in an existing thermal labyrinth located at the basement of a hospital building. This labyrinth is an underground channel equipped with water tanks to increase the thermal mass and reduce the heating and cooling demand of the building. Thermal energy storage in the water tanks is a complex heat transfer phenomena involving turbulent forced convecti...