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orchidnick

Home made gray water recycling system.

11 years ago

Relying on bacterial action and no filters or chemicals one can reclaim the gray water from the house and use it for agricultural purpose. The only thing I could not do myself is to divert the sewage pipes. My X wife who is probably one of my best friends and whose family has adopted me, has 2 plumbers in the group. They diverted all of the sewer water except for the toilet and sent it into my greenhouse where it arrives at ground level. I could do everything else myself with HD materials.

It is diverted to the bottom of a 40 Gallon heavy duty garbage can, which is sunk into the ground, where it is released under a load of 3/4" gravel. The gravel goes 2/3 up then there is a 5 gallon plastic bucket with holes in it that houses a sump pump. When the level comes within about 8"of the top of the large can the sump pump goes on and elevates to water to the next 40 gallon GB can which now sits at ground level.

It is released on top of the 3/4" gravel which fills the can. A pipe picks it up at the bottom and brings it to the next GB can where it again is released on top of the gravel. This all happens below the top of the cans so holes had to be drilled. The process repeats itself with 3 more gravel filled cans. I have a total of 5 cans filled with gravel and the water passes through the last 4 by gravity, is moved from can 1 to can 2 by the sump pump.

The last can then picks up it's water from the bottom and releases it into an empty can. There are a total of 4 empty cans simply connected by 3/4" pipe. The clean water holding cans have an overflow which goes into the flower bed in front of the house. By experimenting I found out how much lower the clean water cans have to be in order for gravity to move the water down the pipe.

Finally a powerful pump will send the water to the 3 watering stations I use, 2 for the orchids and 1 in front of the house. I have not bought the pump yet, wanted to make sure the rest works. So far so good, no odor, the water comes out clear. Tomorrow I'll feed it to my dog , if she survives, I'll drink it myself.

The cleaning happens by bacteria which coat everything. there is a bag of sand at the bottom of each can. One bag of sand has a greater surface area for bacteria then 20 bags of gravel but the water won't move through the sand hence the gravel. The only problem I see is when the laundry person uses bleach to clean white socks or something like that. Happens about once a month. I have a valve where I can send the water straight into the sewer which I will do every time bleach is used as that would be detrimental to the bacteria on which everything relies.

Once everything is dialed in I'll place a bench on to of the above ground cans so as to not loose any greenhouse space, heaven forbid. The whole thing cost about $600 to $700 but I should recapture it in a couple of years with lowered water bills. The main reason I did it is to be prepared if the city I live in ever rations water usage. I use about 5 times as much water as my neighbor.

I'll report every week or so on progress and tomorrow take a few pictures. It's still messy, haven't had time to polish it yet.

Nick



Comments (6)

  • 11 years ago

    Sounds like a great way to save water, money, and your plants, if they ration water. I am looking forward to the pictures.

  • 11 years ago

    Nick, you need a monkey to test the water. Your dog will tolerate more bad stuff than you can...But your orchids will tolerate more than your dog...does any bacteria work or is a specific bacteria required? Aren't there some bacteria that are friendly to humans and others not?

  • 11 years ago

    I'm not really going to do it, yet. The bacteria need at lest 2 to 4 weeks to properly establish themselves. After one month I'll have the water analyzed and then many do it.

    Any volunteers?

    Nick


  • 11 years ago

    Here are the photos. At one point the water seems to get murky, that's because the washing machine was discharging and the water comes out soapy. I fully expect this to take a couple of weeks before it is pristine. I'll post the photos in sequence but they don't always appear that way. In that case I'll number them and they'll make the most sense if viewed in order. Well they posted in reverse order. Look at the bottom one first and work your way up. Definitely a Rube Goldberg set-up but it was fun building it. I talked to the city anonymously and all they came up with is filters and UV light set ups that require maintenance and are expensive. This thing, if it will perform as expected, should require zero maintenance. I haven't told the city about it, what they don't know won't hurt them.

    .Photo #`10 An overflow. This allows me to controll the level of water in the 'Clean Water cans' The difference is what drives the water down the line by gravity. Right now all of the water goes to the flower bed in front of the house until I get the pump hooked up. I found I needed a certain difference otherwise can #2 would overflow when there is a gush of water coming from the house. At this level it can handle the washing machine and someone taking a shower at the same time.


    lPhoto #9 With lids. A bench will be placed on top of them in time.

    Photo #8 All of them, 5 with gravel (the #1 can is not shown), the last 4 with clean water only.

    Photo #7 The second can.

    Photo #6 The end point, the last 4 cans contain clean water only, no
    gravel and here is were a pool pump of sorts will be attached to provide
    pressure for watering.

    Photo #5. Water moves by gravity from the bottom of the 2nd can to the top of the 3rd can.

    Photo #4 The sump pump is active and the water splashes into the #2 can.

    Photo #3 The surface of can #2. Gravel goes near the top, the water is
    released on top of the gravel but has to move to the bottom were the
    pipe picks it up which moves it to the next can, by gravity. This photo was taken befor the washing machine got active and one can see how clear the water is.

    Photo #2. You can see that the gravel only goes up 1/3 of the way, then
    the water enters the 5 gallon can were the sump pump will move it to
    the next can. This is soapy washing machine rinse water which was released under the gravel but still comes up soapy.


    Photo #1. This is were he water comes from the house and enters the 1st can. This is at ground level so the water can leave the house and come here by gravity. The pipe goes to
    the bottom and the water is released under the gravel. The valve is
    there to shut the system down and send the water straight into the
    sewer when bleach washing machine load is in progress. This system depends on healthy bacteria and bleach is not tolerated by them.

    I'm still looking for a volunteer monkey to drink this stuff.

    Nick

  • 11 years ago

    An additional benefit is that I now have a place to put the waste water from my RO system. It wastes 3 gallons for every gallon of clean water it makes. That's going to go in there also as soon as I have the time to run the pipes.

    Nick


  • 11 years ago

    Not this monkey...But you need one...

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