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  1. ruggerjvd

    Wastewater : Magnesium hydroxide vs. caustic

    I have designed several systems with MgOH2. A few things to consider: MgOH has a very high specific gravity, and must be mixed continuously to keep solids in suspension. We used a 6500 gal tank to be able to take a full tank load. The mixing arrangement was not trivial. It needed a...
  2. ruggerjvd

    Estimate of flow in pipe given the pressure?

    Hi bimr I'm not used to seeing darcy expressed this way. I use hf=fLv^2/(2Dg) Is your expression for k from the Crane paper, as well as the Darcy equation?
  3. ruggerjvd

    Estimate of flow in pipe given the pressure?

    Hi Katmar actually, point 1 is in the pipe itself, there really is no reservoir, but there is flow, so v1 is the start point in the pipe, v2 is the point of discharge. How then should I cahnge BErnoulli and loss terms?
  4. ruggerjvd

    Pipe Materials

    I have found that 304 will show quite abit of pitting in a humid environment, or if there are chlorides present. Much of the integrity of the system has to do with the quality of the field welds, whether or not they were pickled and passivated properly, cleaned, and the type of brush used...
  5. ruggerjvd

    Estimate of flow in pipe given the pressure?

    Thank you for the input I was using Bernoulli, and then Hazen Williams with a C of 150 for the friction loss. and a K of 1 for the outlet minor loss. So Bernoulli gave me P1/gamma + v1^2/2g + Z1 = P2/gamma +v2^2/2g +z2 +hf + Hm P1 = 180 ft P2 = 0 (free atmosphere discharge) Z1 = Z2 V2 = 0...
  6. ruggerjvd

    Estimate of flow in pipe given the pressure?

    Hi I am trying to estimate the flow in a 1" PVC pipe, given a pressure of about 80 psi, discharging to atmosphere. If I try to do Bernoulli's, I get a very high flow rate. Are there tables or a shortcut method that can be used to better estimate the flow? I assumed length of about 50 feet...
  7. ruggerjvd

    Denitrification tower options?

    Hi I am looking for ideas on how I can retrofit in denitrification to an existing facility. The plant is an RBC plant, with tertiary upflow sand filters. Plant flow design is 45,000 gpd. Aha, you might say, convert the filters to denite filters. That was my first thought, until I found out...

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