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Thread: Spray vs Air Injector for Aeration

  1. #1
    Non-pro Polymath Matt Helm's Avatar
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    Default Spray vs Air Injector for Aeration

    I am putting together an aeration tank. I would like to avoid using a venturi air injector. So, I am planning on filling the tank from the top with agricultural spray nozzles (sized appropriately for GPM and PSI).

    Thoughts?

  2. #2
    DIYer, not in the trades LLigetfa's Avatar
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    How do you intend to put the air into the tank? How will you bleed air off?

  3. #3
    Non-pro Polymath Matt Helm's Avatar
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    Filtered vent to the outside.

    As the tank is drawn down (by a jet pump that is charging the pressure tank), fresh air is drawn into the aeration tank. During the next fill cycle, air is expelled.

    I am hoping to avoid a powered vent, but it isn't a big deal if I can't.

  4. #4
    DIYer, not in the trades LLigetfa's Avatar
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    Ah, so... non-pressurized hold tank. Is the aeration to remove smell or to precipitate iron? If for iron, then your jet pump will clog up with iron and need frequent cleaning.

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    Non-pro Polymath Matt Helm's Avatar
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    Here is a very simplified overview. It does not show the air vent, filtration, or control circuitry.

    I threw this drawing together for a vendor that I was thinking of getting some parts from.

    Name:  Simple Aerator.jpg
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  6. #6
    Non-pro Polymath Matt Helm's Avatar
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    Quote Originally Posted by LLigetfa View Post
    Ah, so... non-pressurized hold tank. Is the aeration to remove smell or to precipitate iron? If for iron, then your jet pump will clog up with iron and need frequent cleaning.
    For hydrogen sulfide and some other noxious gas. It may be that elemental sulfur will also be an issue with the pump. That is beyond my knowledge.


    Edited to add: I am planning on multiple stages of filtration between the jet pump and the pressure tank. Coarser for elemental sulfur produced by the aeration and finer for some colloidal clay issues that I am still playing with.
    Last edited by Matt Helm; 10-04-2011 at 07:56 PM.

  7. #7
    DIY Member rjh2o's Avatar
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    The aeration/settling tank and any filtration needs to go AFTER the pressure tank. You can the use a Multi-Media backwashing filter to remove particulate matter. The way you have this designed at this point can potentially cause issues with the jet pump operation and pressure switch.
    RJ

  8. #8
    Non-pro Polymath Matt Helm's Avatar
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    Quote Originally Posted by rjh2o View Post
    The way you have this designed at this point can potentially cause issues with the jet pump operation and pressure switch.
    RJ

    How so? From the amount of oxidized iron?

  9. #9
    That's all folks! Gary Slusser's Avatar
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    There may be rust buildup sufficient to block the jet in the jet pump. Cure... install a safety float controlled submersible pump in the aerator tank that comes on/off with the pressure switch on the pressure tank.
    Gary Slusser Retired (= out of business)
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  10. #10
    Non-pro Polymath Matt Helm's Avatar
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    Quote Originally Posted by Gary Slusser View Post
    install a safety float controlled submersible pump in the aerator tank that comes on/off with the pressure switch on the pressure tank.

    I like it (I was going to have a couple float switches anyway).

    Ok to mount a submersible horizontally? Or, is that bad for the bearings/bushings/shaft?

  11. #11
    That's all folks! Gary Slusser's Avatar
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    You can lay it on its side but they aren't made to do that so, since you'll have maybe 3-5 feet of useable water in the tank, I'd hang a 1/2hp 10-13gpm 240v a couple inches off the bottom so it doesn't stir up 'dirt' when it runs.
    Gary Slusser Retired (= out of business)
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