Tag Archives: grey water

The Eco Advantages of Recycling Household Water

If each accommodation was to commit itself to becoming a green home, the beneficial effect on the world would be huge.  Looking at recycling household water as a single issue, both the householder and the government would be financially much better off.

The ordinary household uses gallon upon gallon of water every week.  This life-supporting liquid has been made drinkable (potable), via processes which make it fit for human consumption.

Treated water enters into the building and is used in the kitchen and the bathroom.  Once used, the water is classed as grey water (cloudy and already used), except for the water from the toilet, which is sewage and labelled black water.  When exiting the house, grey and black mix and the water goes off to a sewage plant, for treatment.

In the normal household, it is estimated that fifty to eighty per cent of water used becomes grey water which, if kept separate from the highly contaminated black water, can indeed be used again.  Though the water from showers, dishwashers and washing machines cannot be drunk, it can be used to water the garden, clean the car, or do general cleaning.

Re-using untreated grey water can be done simply, by catching the shower water in a bucket, or re-directing the pipe from the washing machine through a window and into the garden.  The water upon exit may be warm, so allowing it to cool first is a good idea, though do not allow it to stand for more than twenty four hours, as the water will also contain nutrient and pathogens, which will thrive in the warm environment.  As regards to washing machine water, it is important that the laundry agents are biodegradable and low in phosphate and salt levels, as these can have a negative effect on  the soil.  If grey water contains any bleach, dyes or other unfriendly products, you should consider it to be black water and not re-use it in any way.

Rather than making the process of re-using grey water a manual task, the plumbing system in a modern building can be two-fold, one system for elimination of black water and the other to capture and re-use the grey water.  Filtration can also make grey water fit for washing, though it will never be pure enough for drinking.

By re-using grey water, the amount of water used will be greatly reduced and, in turn, the benefits will be recognised when reading of the water meter.  Also, less used water will arrive at the sewage treatment plants, reducing the cost of recycling the water back into the system.

Thinking about how we use water is an area we can all address and can be the first step in developing an energy-efficient accommodation.

Building Eco Homes

My father is a retired architect and now fills his time doing a lot of work on his own home, or should I say, homes.

This time, he has decided to go eco-friendly and has been quoting words that I never learnt at school.  We’re talking ground source heat and grey water, the latter of which, until he explained it, I thought was a new film he’d been watching!

He decided to go for ground-source heat, which meant laying plastic tubes well underground, then filling them with a mixture of antifreeze and water.  Together with a heat pump which contains a compressor, the process increases the water temperature from a meagre 15 degrees centigrade to a very welcome 50 or 60, which is then circulated through the radiators.

Grey water is so-called because it is cloudy in colour, so it’s water that has already been used by dishwashers, washing machines or showers, as opposed to black water, which is sewage from toilets.  In effect, the grey water could be used again, let’s say, for watering the garden or cleaning the car but, in a regular build, there is only one plumbing system, so grey and black water mingle to enter the public sewage pipes.

Today, many houses now have water meters, the cost of clean water encouraging us to use less.  If there are two plumbing systems in a building, the less-contaminated water (the grey) could be recycled by easier means than catching it in buckets or allowing the outlet pipe to drain outside into containers.  That initial outlay for a second plumbing system would not take long to recover, since there would be a saving on the water bill.

Energy efficient accommodation is what we all need to be thinking about. Builders of eco homes are now taking these important ideas and many more on board and, although it may cost a little more to get these new ideas installed, the savings will be enormous over time.

Getting back to my father, we’re all very proud of him and he is already thinking of taking on another project. My mother is over the moon, not only because they are going to live in an eco-friendly modern building but because it seems that the vibration from the underground pipes is keeping the moles at a distance!

Thanks to the knowledge that I have gained, not only from my father but also from supporting websites like My Space Pod, I’m hoping that many more people will research the subject and see the sense in opting for modern building designs.