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How can we reuse grey-water?

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Water in homes is generally considered to be potable water that is supplied through pipes and waste-water or used water is taken away by sewage pipes. But today with the growing crisis of water, grey-water has become an important source of water in homes, factories, schools and commercial establishments. If you have a proper water recycling system or sewage treatment system installed in your home, office or apartment then you can recycle the used water to grey-water and cycle it back for usage. It is calculated that by recycling water, we can save 70 litres of potable water per person per day. In the current scenario where cities are on a countdown for running out of drinkable and potable water and rain is failing to revive the underground water systems, we need to depend on water management systems like sewage treatment plants in order to reuse and recycle the water we already have.

We all need to consider using grey-water or reclaimed water or recycled water in our daily lives as there are a host of benefits, as stated below

  • Reduction in the number of pollutants that are being let out into the water bodies such as lakes and rivers.
  • Streets and Avenues
  • Fills the gap of essential water supply in sensitive areas
  • Reduced freshwater extraction from the ground
  • Replenishment of ground-water table
  • Improvement in the nutrition of the topsoil
Is grey-water safe?

Grey-water processing needs a proper system to be installed. It is always better to consult an expert while getting this system installed in your apartments, offices or commercial complexes. The system also needs regular checks and maintenance and untreated water should never be recirculated back. There are other natural systems available to treat greywater. The type of system selected will depend on the specific application, and selection would be considered on a case by case basis. If the treatment and storage of grey-water are done incorrectly then it would be detrimental to health.

Flushing Toilets - Grey-water can be recycled back to flush tanks to be used multiple times. Once the sewage water has gone through an entire filtration process and becomes grey water, this water can be circulated back to the flush tanks. This will cut the usage of water in flushing by half.

Watering Gardens - Grey-water is the most environmentally-friendly way in which we can maintain our gardens, plants and lawns. It is also recommended to use this water for home-grown vegetable gardens.

Irrigation - There have been several experiments and tests that have proved that grey-water is safe for irrigation of plants and crops. Grey-water if supplied to the soil, improves the quality of the topsoil thus making it more beneficial for the greenery.

Washing Clothes - If you are collecting grey-water from showers, washing clothes, or from the kitchen then with some basic filtration, you can reuse this water for washing clothes.

Water-efficient plumbing fixtures and designs are essential for optimal usage of grey-water. With the right technology, water used to wash yourself and your clothes can be reused on a regular basis, thus reducing our dependence on the ground-water systems.

Research and Concept by A.R. Shivakumar
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