We have excavated a small backwash settling pond and are planning to install a clay liner. When we reached the bottom depth we hit water and the soil (clayey sand) is very unstable and is pumping . It's basically like walking on a water bed in places. At this point I'm not sure a roller could...
My customer has an old 65ft steel truss bridge that he wants to use to cross a small creek. It's very similar to this one: http://www.bgstructuralengineering.com/HmwrkDwg/TBridge/bridge15.gif except on mine the floor beams sit on top of the cross beams. The bridge is already sitting on the site...
I am working on a 2MGD package treatment plant. We are injecting two polymers:
- Kemira A-110, anionic polmer before the tube settlers,
- Kemira C-492, cationic polymer before the adsorption clarifier.
What is a typical solution strength for these chemicals? I need to size feed pumps.
Also...
The pressure will be low if one of the treatment plants is shut down for any reason. I believe since it is not a distribution line the pressure can drop below 20psi.
I don't have numbers on expected flow ranges yet so i can't do any sizing. I was just concerned that a PRV would still have to...
I am working on a system where purchased potable water can be received at a high pressure of 143 psi or at a low of 2.16 psi through a 12” line.
The pressure is to be reduced to about 70psi, when it is above 70psi.
When the pressure is 2.16 psi the valve needs to have very low head loss.
My...
