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Old 09-26-2010, 03:25 PM   #1
Mini-Skoolie
 
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Water Recirculation System

One day when I get a Skoolie to work on, I dream of installing a gray water recycling/recirculation system.
The water going to the gray water tank, at some point of its travels is filtered and sent to another tank via a pump and constantly reused (at least for a while). Perhaps the other tank is on the roof and now can work as a gravity-feed system. A tankless heater heater heats the water unless the sun has done it (or part of the job) already.

It's possible that this recirculated filtered water should be filtered again before being drunk but for showering and washing hands and dishes I'm thinking it will be okay. I would change the water regularly throughout the year.

I see potential problems keeping the water warm enough to recirculate in the winter, particularly on the roof and under the floor.

Your input, criticisms?
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Old 09-26-2010, 07:15 PM   #2
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Re: Water Recirculation System

NO

U can use the gray water for flushing , but to make it safe for drinking and showering would take to much treatment. gray water carries lots of stuff that will grow in the system real fast and faster with heat. the amount of treatment would not be worth the cost to do it right. here in canada we had to guys that ran the water treatment plant , (Walkerton Ont) they killed people just by forgetting and mixing stuff up (they were found impaired), anyway I work in water treatment, there s more then just adding chemicals.

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Old 09-26-2010, 08:58 PM   #3
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Re: Water Recirculation System

Thanks for input. I was expecting to have to filter the water again for drinking or even better keep a separate drinking water supply.

There are some impressive portable water filtering systems being used in the third world for visitors and are available online. I suspect the water would go stale after not too long hence a good idea to change the water regularly.

On the positive side, you can stay out longer in terms of water, and take long showers and baths!
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Old 09-26-2010, 09:46 PM   #4
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Re: Water Recirculation System

To make the grey water potable water would take more than filtration, unless you prefer to drink soap. Distillation or a RO unit, and that after much filtration. It's expensive to do.

I've used grey water to flush a toilet in a house; which works, but grey water gets stinky. I didn't want to use cholrine as the toilet went to a septic tank. Wife left and so did water use problems. The house used rainwater collected in cisterns, so the supply was finite. I went back to using rainwater for flushing. It's easier.
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Old 09-27-2010, 12:08 PM   #5
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Re: Water Recirculation System

Quote:
Originally Posted by Smitty
... Look on YouTube at solar distillers (something that wouldn't require power from the bus) or something you could do over a fire (basically a moonshine still ).

Smitty
Just gotta watch out for those damned Revenuers! My grandfathers both had problems with them... My mother's father ran rum up from Cuba during Prohibition and my father's father made 'shine... all the time. would you believe they still have Rvenuers running around the mountains bothering folks? I don't see how anyone can sell 'shine and make a profit on it.... Not that I know anyone who still makes the stuff.
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Old 09-27-2010, 12:51 PM   #6
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Re: Water Recirculation System

Thanks all for the great input. I will look into the distilling idea. At the moment (and tentatively) I was thinking of a dirt/sand based first stage cleaning process (also see YouTube) to be immediately followed by UV bombardment. Again this is not for drinking.
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Old 09-27-2010, 11:06 PM   #7
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Re: Water Recirculation System

Thanks all for your posts. I am confused that so many are mentioning drinking the water when that is a sideshow to this whole thing.

Frankly I would want a separate source of drinking water. This topic concerns cleaning, UVing and recirculating water for nondrinking purposes.

I must have written it poorly as so many are bringing up drinking the water.
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Old 09-28-2010, 01:04 PM   #8
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Re: Water Recirculation System

Thank you Smitty!
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Old 09-28-2010, 02:08 PM   #9
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Re: Water Recirculation System

I have worked on constant recirculating potable water system on aircraft.
They use UV lights to cleanse the water, this will even remove the worst contamination.
The idea behind the constant recirculating system is that you use a pump that is gravity fed from the tank, ie just underneath it.
The pump send the water around a looped system back to the storage tank.
Heres the good bit.
Place a restrictor valve at the end of the return at the top of the storage tank.
This ensures pressurization of the system.
You can then take feeder lines from the loop to the faucets and you get pressurized delivery.
The water also stays "fresh" as it is constantly recirculating through the UV disinfectant unit.
You can get commercial UV filtration systems from hot tub specialists.
All parts are available as 12 volt and the pump can be activated on demand to provide water
at the faucet and on timer to recirculate water through the sterilizer back to the tank.
Do not forget to baffle the tank, water is heavy and shifts.
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Old 09-29-2010, 08:17 AM   #10
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Re: Water Recirculation System

Quote:
Originally Posted by Smitty
pipsqueek- Wouldn't the pump serve to pressurize water delivery?

Smitty
Not if it is a free flow open loop system.
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