Science Buddies: "Ask an Expert"

can any one help me with building a pressurized Ro device for separating salt

Hello and welcome to the forums.

While there isn't a specific Science Buddies project on Reverse Osmosis, there are a number of relevant posts: https://www.sciencebuddies.org/science- ... se+osmosis

Also, an Internet search comes up with lots of ideas.

If you could please be more specific with your question, we would be happy to help.

Best,
Keith

Thank you for the links to research.

I am trying to build a small box and in between I want to have Ro Memebrance and also add pressure to salt water for reverse osmosis.

I wanted to know how I could go building the box that can hold air pressure of atleast 30- 40 TPI and also have a membrane in between the box

Hello Ashek,

Does your device have to be a box (rectangular) shape? If not, one idea that comes to mind is to make your device from PVC pipe of the type used for plumbing. PVC pipe can withstand water pressure of 50 PSI so it should work for the pressure range you've suggested. I think that a variety of fittings are available for connecting PVC pipes. Perhaps there is a fitting that will accommodate the membrane you want to use.

I hope this helps. Please post again if you have more questions

A. Norman

I second the suggestion of using a pipe.

The round shape distributes the pressure evenly. Any container with corners will need to be sturdier to withstand the same pressure. This is the reason all pipes that are expected to hold water or gas under pressure are round, at least on the inside.

Pipes also have inexpensive ways to screw them together and make complex shapes, with seals that can withstand the same pressures as the pipe. Clamping a membrane on the end of a pipe and sealing it can be done - depending on the material you might even find a glue to do the job, but a mechanical clamp would be my first approach, with likely either an O-ring or some kind of glue/sealant involved. Take the membrane to the hardware store with a likely length of pipe you find there and ask for help - they might have a clever way of attaching the membrane.