Water Harvesting in Universities, Schools, Hostels, Hospitals and Household

Posted on 28/09/2018


Rajasthan is a state of rich culture and diversity. In terms of tourism, It includes the lush green places like Udaipur to the arid desert regions like Bikaner and Jaisalmer. The major features include the ruins of the Indus Valley Civilisation at Kalibanga; the Dilwara Temples, a Jain pilgrimage site at Rajasthan’s only hill station, Mount Abu, in the ancient Aravalli mountain range; and, in eastern Rajasthan, the Keoladeo National Park near Bharatpur, a World Heritage Site known for its bird life. Rajasthan is also home to three national tiger reserves, the Ranthambore National Park in Sawai Madhopur, Sariska Tiger Reserve in Alwar and Mukundra Hill Tiger Reserve in Kota.

Rajasthan is the largest state by area. It includes many residential universities, colleges, schools, hospitals etc. Many students come from all over India to study in the prominent universities like AIIMS, NLU, IIT, IIM, NIFT to name a few. There are hundreds or thousands of more residential colleges, schools, universities in Rajasthan. In all the residential schools/ colleges, a number of watercoolers and RO systems are always installed on every floor. It is a widely known but grossly neglected fact that a huge quantity of water is wasted in RO purifiers. For every one litre purified, around four litres of water is wasted. And when it comes to places like Universities, Schools, Hostels, Hospitals etc, there are dozens or hundreds of water coolers with RO systems installed in a single campus.

Rajasthan is a big state with a substantial part of it covered by desert. It has been facing a problem of scarcity of drinking water. People always talk about Rainwater harvesting and wastewater treatment, but there’s still one huge factor responsible for wastage of water which we don’t pay attention to. In this blog, I’ll be talking about RO water Harvesting.

In every College, Every hostel, Every hospital, there are dozens of water coolers installed. Mostly, they are turned on all 24 hours and this leads to the wastage of a huge quantity of freshwater. All this water is let out into drains. On the one hand, wastewater from ROs is let out into drains, whereas on the other hand, for the purpose of irrigation in grounds of such campuses, groundwater or other freshwater is used.

In every campus, there should be an RO Water Harvesting system where all the wastewater from the ROs can be connected to a common pipe which is further connected to a container or the irrigation pipe. In this way, one can save both water and electricity. Since the watercoolers on the higher floors of hostels/hospitals/colleges can provide pressure to the water (Pascal’s law of liquid pressure), they don’t need turbine motors to extract water from the ground. Also, it will be a very efficient and cost-effective and eco-friendly technique because there’s no or very minimal consumption of electricity, The water flowing into drains will be used to irrigate and hence will also add up to the groundwater level hence raising the water table. It will also reduce the burden on Wastewater treatment plants as it will drastically reduce the amount of water that they need to treat.

When it comes to households, there are not many ROs in a house and hence irrigation system is not feasible. But similar to rainwater harvesting, this water can also be stored in a container for future use. Else this water can be used to wash the clothes, Dishes and other utensils.

Hence the alternative usage of wastewater from ROs is what is needed to be spread awareness about and can help in achieving a long pined dream of making Rajasthan clean and green.

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