Integrated Water System

Integrated Water System in a large Housing Development This is the central water supply for the area, that feeds a series of buildings. Itís located in this substation, in these chambers, and provides three or four services distribution of water, water recovery, rainwater harvesting. There is the cold drinking water supply, the firefighting supply and water treatment. They are connected to water processing equipment. Behind this wall are two tanks, one for firefighting and the other for rainwater recovery. This service, say, has a dual function: one of ... say, environmental sustainability, virtually no extra water is going to go into the municipal sewers if we get thunderstorms or excessive rainfall. We prevent a surge because the water is held back in this large tank and used for applications like flushing toilets and general watering. There is the issue that the rainwater we harvest will have run off surfaces that may be dirty or biologically contaminated, so before it can be used, it must be filtered, cleaned, chlorinated, so that the level of bacteria is compatible with its use. Before we put it into circulation, there is a system of control and water treatment, that that adjusts instant by instant, the content of chlorine in the water. And also, there is a pump that circulates the water, so that it is not static, does not become stagnant. So it does not smell. At the same time we monitor the chlorine content. Then the water that has been chlorinated, given anti-bacterial treatment, passes through these pumps, high efficiency inverter pumps, and before going into the network pass through this coarse sand filter. The water passes through the sand and this clarifies it, cleans it - both from a visual point of view, its colour, and purifies it so it does not smell. At the same time, we have to have a back-up system. We installed this because in Italy, especially in Rome, there is little rain. If we do not water to be drawn first from a borehole, and then from the public water supply, although we try to use as little of this as possible. The other service is, of course, cold drinking water. We donít have to treat that. It is taken from the water mains and only part of this, what we use for providing hot water, is monitored and treated to prevent Legionella and also corrosion. It is all monitored and controlled. But Legionella is a very big problem. For that reason it is chlorinated and heated to destroy the Legionella bacteria