Water-readings

What is grey water?

Greywater is the household’s wastewater, other than that coming from toilets (black water), meaning the wastewater from the the sink, shower, washbasin, bath-tub and laundry machine. This wastewater can be relatively easily, treated and reused.

Modern technology offers a lot of options for an effective greywater treatment. The most popular greywater systems treat water coming from the showers, bathtubs, washbasin and laundry machines, but not that from the kitchen sinks and the dishwashers, as this requires a more complex and costly technology.

Water-readings

How do we treat greywater?

Greywater treatment is realised through an automatic closed system that includes pipes, pumps, filters and tanks. Firstly, the greywater from the washbasins and the shower/bathtub is collected through pipes and led to filters that hold the large suspended solids.

Then, this water is led to the treatment tanks where it is aerated, re-filtered, and disinfected to eliminate any harmful microorganisms.

Finally, water is stored to a tank and is ready to be used both inside and outside the building, with the help of a pump.  The treated greywater is mainly used in the toilet flushing.

The entire system is closed and automatic, so that there is no human contact for safety and hygiene reasons. A control unit is included as and the users need to maintain the system (change filters, add disinfectants, etc.) following the manufacturer’s provisions.

The treated greywater should not stay long in the storage tank: If it is not used within 24 hours the stored water is channeled to the sewage network.

A household that recycles its greywater can save up to 1/3 of consumption from the water supply network!

Way forward

Dive in…

the Rainwater harvesting , the Wastewater treatment or the  Desalination unit if you want to know about other non-conventional water resources.  Examples of greywater systems if you want to know more  about how an actual greywater system installed.

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