Toilet Technology Recycles Water, Produces Waste Heat
Reaqua Systemsâ€™ toilet technology recycles wastewater from baths, showers and some sinks for use in flushing toilets â€” and can extract heat from the greywater, feeding it back into the central heating system.
The reAqua and reAqua+ units, available in the UK, both reduce water consumption by a third, while the latter (which has the optional heat recovery from the greywater) also enables a two-fold reduction in CO2 emissions, the company says.
The two products can be used in retrofits and new buildings. A revised plumbing setup takes all wastewater from baths and showers, redirecting it through a compact reAqua filtration unit where it is treated with a disinfectant. This treated water is collected in a tank and piped on, as required, to supply all the flushing water needs for multiple toilets.
A family of four will typically save 110,000 liters of water each year using a reAqua system, the company says. A development of 20 family homes uses just over 4.38 million liters of water annually. Fitted with reAqua technology, the development would save a total of 1.46 million liters, Reaqua Systems says.
Plus, the new technology means users donâ€™t have to make any lifestyle changes, Reaqua Systems CEO Stephen Bates says. Thereâ€™s no need to fit water rationing and flow restriction technology such as low-flush toilets or low-flow showers.
Also, Bates adds, unlike other water recycling concepts such as rainwater harvesting, reAquaâ€™s greywater supply is predictable, consistent and not dependent on the weather.
End users can expect savings on metered water bills between Â£200 ($311) and Â£500($771) a year, with a typical payback time of three to seven years, the company says. Fitting a reAqua+ system typically offers a projected lifetime saving of between Â£4,000 ($6,222) and Â£10,000 ($15,554) per unit.
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