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Old 09-28-2017, 03:51 PM   #1
Mini-Skoolie
 
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Repurposed Greywater

We're using a composting toilet but are wanting to reuse our grey water to supply our onboard plants with water. Anyone here have experience with this or other catchment systems to supply water to a small garden-esque installation?

Thanks

Matt
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Old 09-28-2017, 04:13 PM   #2
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Love that idea. You could do it for sure. Probably would need some kind of filter. For the soap, toothpaste and whatever else might get washed into the gray water.
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Old 09-28-2017, 07:31 PM   #3
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Just remember not all grey water is created equal. If you are washing dishes all the food particles and grease going in can cause your grey water to get pretty nasty pretty fast.


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Old 09-28-2017, 08:25 PM   #4
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I've thought about creating some sort of filtering system to get out some of the food grease somehow. Charcoal, sand, etc. I'm also not above some kind of larva culture in order to fully recycle everything we produce in the bus. Those kinds of things stay pretty self-contained and can handle anything organic.
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Old 09-29-2017, 09:09 AM   #5
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Larva culture in the tank itself? I think the whole thing depends on how nasty the grey tank gets. Maybe a screen in sink to keep food out. That is probably the major component making water nasty. Get one of those grease separators like they have in restaurants. Guessing a small one may be found cheap.
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Old 09-29-2017, 10:37 AM   #6
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Larva culture for stuff that gets caught in the sink. Something like a 5gal bucket that feeds into a hopper.

Might play with a grease trap of some kind. I'm pretty sure we could clean that into the larvaculture as well.
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Old 09-29-2017, 11:12 AM   #7
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Many public and corporate buildings reuse sink water from the bathrooms for flushing toilets and watering grass. However, in order for this to work, the products in the used water cannot be too alkaline or it will harm the plants. This is partially why a lot of public or corporate buildings use hand soap much different than what one may generally use at home. It would be worth it to use cistern-friendly or environmentally conscious products in the bus if you reuse your water.
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Old 09-29-2017, 02:35 PM   #8
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i really doubt there would be any cost benefit to recyling such a small amount of water.

a few potted plants will not exceed a couple of gallons use in a months time.

waste water is high sodium too, bad for plants. with out treating ph and sodium (salts) your not doing your plants any favors.

easier to plan on a using a larger fresh tank with enough capacity for you and the plants, than than to treat waste for reuse.
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Old 09-29-2017, 02:54 PM   #9
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Quote:
Originally Posted by turf View Post
i really doubt there would be any cost benefit to recyling such a small amount of water.

a few potted plants will not exceed a couple of gallons use in a months time.

waste water is high sodium too, bad for plants. with out treating ph and sodium (salts) your not doing your plants any favors.

easier to plan on a using a larger fresh tank with enough capacity for you and the plants, than than to treat waste for reuse.
Turf has a point. Recycling grey water on such a limited scale may prove impractical.

Lifestyle adjustments that allow you to produce less may yield better result than trying to recycle.
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Old 10-12-2017, 11:11 AM   #10
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I would be concerned that the chemicals in the soaps, tooth paste, food stuffs, etc.. would kill the plants you are trying to water.

If you are planning on small scale and wont need a LOT of water at a time... you could easily run it through a gravity ceramic/charcoal filter which would darn near make it safe to drink... let a lone safe to water plants with.

They make all different kinds of filters that can be adapted to stacked buckets or pots to make a gravity water filter. The ones I use are Donaldson candle elements that are carbon filled. They work great for making less then perfect water, potable.
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