Today world, in which we need to make more effective use of resources, harvesting rainwater is a good way for solving some water related issues in domestic scale. They are common placed in homes, farms, public buildings such as schools, hospitals, and hotels and different facilities.
As urban life develops , the must for treated water increases , and so do the costs. In urban water supply systems, all water has to be used to drinking water quality but only 1% of water consumption is used for drinking. In Ireland, daily water consumption rate per person is 148 litres. However , only 67 litres of this is used for private and nutritional consumption. This means that approximately 80 litres of water per person on a daily basis do not have to be high quality. For different purposes such as watering plants, toilet flushing, cleaning or even carwash, water harvesting can be a good , not expensive , and environment friendly solution.
What is the idea behind rainwater harvesting systems?
It is plainly " collecting rain water in a tank" in its traditional meaning. Today , rain harvesting systems are much more efficient with the addition of a couple of elements , such as pressure vessels, pumps and filters. A typical rainwater harvesting system has the following elements:
Water catch surface: this is the main component where water is gathered , the starting point of the system.
Channels: to transport water from catching flat to storage tank.
Filters: these are used to filter particles in rainwater. Pumps and pressure vessels: to pressurize water and store water pressurized. Water storage tank: this is the tank where ready-to-use water is kept .
Piping system: to transport water to the places of consumption. Although rainwater in general contains less minerals because of the air pollutants that may melt in rainwater, harvested rainwater should be further treated if it is intended to be used as drinking water.
How much can you save using rainwater harvesting systems?
The answer to this question depends on where you live , i.e. how much rain falls annually , the area of your water catch flat and your water consumption. But , to make a rough estimation , you can save for each square meter of your horizontal water catch surface annually .
Rainwater harvesting systems are considered to have a great payback and they generally pay for themselves in a few years. After that, the more rain means the more you economize . On the other hand, if rainwater harvesting grows more common there will also be a reduction in national costs for water treatment. Thus, it can be concluded that rainwater harvesting contributes to not only personal utility costs but also national treatment costs, which is a cost item for taxpayers.
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