Recent content by htwoOtreat

Thanks. Do you happen to have a good reference that presents the Ergun formula for this calc ?

Assume high purity water application (i.e. food and beverage)

Trying to find the optimum liquid phase activated carbon bed depth for acid wash carbon (12 x 40 mesh). Is there such a thing as a maximum bed depth in a vessel. If so, what is the limiting factor (i.e. backwash flow, compaction of carbon, pressure drop, etc) ?

Thanks. What was your theoretical (since the project was shelved) pay back for this device. What was your operating pressure. Regards

Does anyone have experience/data regarding Brine Energy Recovery devices (i.e. ERI turbo) used on Brackish Water feed (not Seawater). Is it cost effective for a brackish water feed water or 2 pass RO application?

Thanks Gary As you mentioned, most resin suppliers specify minimum freeboard (i.e. 50-75%) based on 30-50% bed expansion as you describe, but is there a limit to how much freeboard. One document rule of thumb states that you need 3 volumes (bed + freeboard) needed to achieve a 95% flush out of...

Does anyone know what the maximum recommended freeboard height to accomplish backwash of a single bed ion exchanger. I have observed industry standards for minimum freeboard at approx. 75% based on 50% bed expansion, but I have not seen guidelines for maximum freeboard and the impact.