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bimr I did find a Nordell. Thanks for the recommendation!

Thanks, bimr! That is exactly what I wanted to know. Appreciate your help. is your Nordell book is pretty old (like 1961?). Must be an "Oldie but Goodie"? Oftentimes it seems to me that very old engineering books are better than newer ones. Newer ones can of course address technology...

bimr, Thanks for your response. Will look into the book. I am still curious on the mixing. I have read all of the above responses but they don't exactly answer my question (still appreciate them -- sometimes gives me ideas for other things I'm working on!) What I am thinking is simply that...

mdsjz - I don't know the chemistry of the Fe - Cl precipitation reaction but I'm sure you could call Tonka or US Filter and they could tell you.

Thanks, Semo. Big help. I can't believe I didn't think to check Ten State. Duh. Too many "irons" in the fire! I am still curious on the mixing question. In the aeration/detention setup we have, there is no sedimentation. The detention time serves only to give the oxidation reaction time...

For my .135 MGD water treatment plant, they are currently using Cl gas for disinfection. They would like to go to Hypochlorite. I am wondering if the calcium hypo Accu-Tabs would be a good fit for this small application? Has anyone used the tablets in this size application? How do they...

I am working with a small municipality upgrading their water treatment system. Their existing system pumps water from wells (.135 MGD, 1.5 ppm Fe, negligible Mn)over an aluminum induced draft aerator (rated 300 gpm), into a detention tank (11,500 gals), from which their high service pumps draw...