Considering that in windy areas the construction of wind power plants is preferred and in areas where the sun is incessant photovoltaic systems are built, why not take advantage of therain water in extremely rainy areas? L'water it is no longer what it used to be but fortunately we have a way to filter and purify the collected rainwater. Various scientific studies conducted in recent years have shown that therain water, properly filtered, it can have characteristics comparable to those of distilled water.
How can we recycle rainwater?
Rain has characteristics that are in some ways preferable to those of drinking water: first of all, it is free of limestone and very poor in mineral salts, so it avoids the formation of classic whitish deposits and reduces the maintenance needs of household appliances, toilets. and flush toilets.
It is perfect for watering plants (without chlorine), washing the car, washing machine or dishwasher, doing daily cleaning.
However, despite the many advantages, however, the practice of recycling rainwater is not yet widespread, so much so that some municipalities offer incentives to those who install rain recovery systems at home.
How to purify rainwater. Water recovery and filtering
Rainwater can be collected in multiple containers, as clean as possible, capable of not dispersing the liquid: clean jars, cavities in the rock, plastic clothes, etc. The simpler systems provide for the collection ofwater on roofs through a specific system of gutters, inside a special storage tank, where the rain flows after being filtered. The size of the tank may vary depending on a series of factors, including annual rainfall, the type of installation (underground or above ground), the number and type of users to be served.
On the market it is possible to find storage devices of very different sizes, from 150 to 20 thousand liters. The maintenance of the filters is also very important (there are different types on the market), to avoid contamination of the liquid and the formation of sediment deposits, which could damage the system. Through a pumping system, the rainwater is then distributed to the various users to be supplied. Usually, pumping systems allow the water to be taken below the surface level, where it is cleaner.
Inside the tank, the water, of course, will decant and will be drawn by an electric suction system which, through a control unit, will keep an eye on the amount of water stored. In this way, in case of out of stock, the system will automatically return to connect to the traditional water network. The cost of a complete system (tank + hose + filter) should run around 800 euros.
How to purify rainwater and make it drinkable
Water is the element of life, so it is important to be able to get a drinkable source of it and where it is impossible to try to purify it. For purify the water it is useful to use substances such as iodine or chlorine (in the right percentages): in the absence of these resources, the simple technique of bringing the liquid to boiling temperature (for about 10 minutes) thus eliminating all germs is valid. Finally, the water can be filtered in several layers (through sand, clothing, coal, rocks, etc.) and left to rest for 12 hours away from contaminants of all kinds before being ingested.
The damage resulting from the ingestion of non-potable water involves situations such as: dysentery, severe and prolonged bloody diarrhea, fever, weakness, viruses / serious illnesses (cholera, typhus, etc. regardless of vaccinations) or the presence of parasites in the body. It is important to remember that the taps and withdrawal points that deliver recovered rainwater must always bear the words "Non-drinking water".