? Reverse Flow UAS ??

[RkClimber]

Has anyone tried a reverse flow UAS yet? The bubbles would have a longer and possibly better contact, the water would have a longer contact. My idea was to have the water flow down over the screen, then out each or one side, then up and over a separation wall, and into the pump reservoir to be pumped out to the tank. 2362 So don't be shy, tell me what you think. I'd love to here from SM, Floyd, and Kerry

[steve irwin]

i have also thort about this be interesting if any1 has tried it out.

[SantaMonica]

It would work against itself. You want fast velocity, not slow.

[RkClimber]

It would work against itself. You want fast velocity, not slow.It should have fast velocity since it would be using a pump. You could use any size pump you wanted.

[RkClimber]

It would work against itself. You want fast velocity, not slow.

Wait you want fast velocity in the water flow, the air bubble passing by, both, which please?

[SantaMonica]

Both. But fast bubbles means fast water.

[steve irwin]

wouldn't the up flow off bubble's and down flow off water create more turbulence? and suspend the bubble's in the water column for longer?

[kerry]

I would think you want the bubbles to leave fast so new ones with greater co2 content would be present. I dont think holding them in the column would be better as the co2 would be used up by the algae and not any good compared to new fast moving ones loaded with co2.

[RkClimber]

You think that the co2 would get used up that quickly? I mean were not talking that long of a period of time here a milliseconds or so, just long enough for good if not better contact, so I thought. I would think the reason for having such a fast current and amount of bubbles is to really get a good contact with the algae. In this way you're getting a better contact with the water meaning of greater absorption rate per volume of water. Greater contact with each bubble meaning more absorption rate of the co2 thats in the bubble. Lastly greater turbulence should open up each individual hair of algae so we're geting better contact with each strand and less dead roots.

[kerry]

The longer the bubble floats around the less co2 it has as it looses it to the water. This is why I think direct contact with the algae would be better. I think a higher concentration of co2 in the bubble is better suited if it spends most of its time on the algae and not the water column.

[RkClimber]

ok, then maybe adding some co2 to the air from the airpump would help, yes?

[RkClimber]

i remember this (adding co2)has been discussed bei just can't remember what the results were.

[SantaMonica]

Correct; if not touching the algae, it does nothing at all.

[RkClimber]

SM have u or any one thought of using a powerhead w/ a pinwheel & venturi

[kerry]

I have thought about using a couple power heads with the venturi port. I have not pulled the trigger yet as I do not have these just laying around.

[RkClimber]

If you have a powerhead & air line that's all you really need. Have one side of the airline above the water line & the other right in front of the PH intake. The suction will pull in the air and the wheel will chop it up. If you were to ads a air pump use a small one otherwise it pulls in to much air.