Water - High Grade Resource, Low Grade Uses

Water is a necessity of life and far too many of us take it for granted. In reality, it requires a huge amount of energy and planning to pump, filter, treat and convey water from its various sources to its final use. For many facilities, a majority of water use can be attributed to irrigation and flushing toilet fixtures. These uses don't require the same level of treatment as drinkable water, so why do we expend all that energy and planning to treat water to this drinkable level only to (literally) flush it away?

Rainwater harvesting is a technique that has been around for thousands of years and there are many ways to accomplish this. Simple rain barrels are the most cost-effective way to collect and conserve rainwater for personal uses such as gardening or home and yard maintenance. For commercial applications, single and multi cell detention and reclaim systems are used, and are commonly referred to as cistern systems. This is for rainwater harvesting that requires water to not only be collected and stored, but also filtered and treated to meet applicable health codes.
These systems also require a mechanism to deliver water from the container to its end use. To accomplish this, a rainwater cistern can be connected to electric booster pumps that convey the water from the cistern storage tank to a building's flush fixtures or irrigation systems. In some instances, these systems can also be designed to detain, treat, and convey stormwater runoff during heavy rain events.


The volume of the cistern can vary widely depending on its expected performance and the size of facility it is supporting. A cistern can be designed to simply supplement potable (drinking) water use, or it can be designed to offset the entire water demand. To compliment rainwater harvesting, consider pairing with a low-flow fixture strategy. Low-flow fixtures can help reduce water use for waste conveyance by up to 40 percent, thus reducing the demand on cistern storage.
When you take into consideration occupancy loads and building use along with the local climate and its precipitation rate, a rainwater harvesting system can help to offset a majority - if not all of the remaining load. This is, of course, at the discretion of Mother Nature. Periods of low rain or dry spells will impact the amount of water available for use. But, by researching historical weather data, insufficient water periods can be planned for and cistern designs can be modified to accommodate specific climatic concerns.
In addition, systems can be tied to domestic water lines to ensure a cistern will never go dry - it will pump in additional water when the cistern falls below a pre-set level.

Thats a good decision  for saving water in smalln houses and also it coulld be used in apartment however becouse of space limitation this amount water could be used for cleaning the street or lifts and e.t.c