Improved design of a simplified rooftop rainwater filtering system

Abstract

Needless to say that water is perhaps the scarcest commodity of the 21st century. On global scale, it is assessed that over the next two decades, water use by human beings will increase by 40% and 7% more water will be needed to grow more food for the increasing population. In this context, we could figure out the need for water harvesting. There are numerous technologies developed and adopted for rain water harvesting. But, now the innovation continues on the filtering system. This study focused on developing an improved and simplified rooftop rainwater filtering system. The design includes the construction of an upward flow filter using a 100 micron mesh. The unique feature of the system is its ease of cleaning. The filter performs more effectively in the removal of suspended particles. The discharge rate of the filter was found to be very high. The quality of harvested water was tested to ensure its potability standards. The system gives a filtration rate of 3.83 m 3 /min/m 2 and efficiency of 91.5 %. It can be concluded that the designed filter system satisfy our objectives and can be used for household as well as community needs.