Potassium Permanganate & Greensand Filter 1

[smantai]

Hello! I posted this question at environmental engineering forum, but figured you guys may be able to help me also. We have tried to optimize our KMnO4 dosages, and discovered NOBODY at this facility knows anything about it...
I started digging and discovered we were mixing our KMnO4 at only 0.065%. I am curious what is the standard? We regenerate at 10%, so I am just wondering what everybody else would mix theirs at? I did some research, most people DOSE at 0.6-0.8 mg/L. That is all fine and everything, but at what percentage!!!
If anybody can help me, it would be SO appreciated.
Thanks to all for your time!
SAM!

 

[bimr]

Chemicals are typically diluted to 5-10% solution strength prior to feeding. The dilution process is used to minimize potential chemical feed problems. For example, some chemicals have a lower freezing point than water. Also, the flow rate of neat chemicals may be so low such that at the low flow rate, it is difficult to accurately meter the chemical.

It is fairly common to have a bulk tank for neat chemical and then have a day tank for dilute chemical.

Potassium permanganate is available as a liquid or dry chemical. The liquid is easier to handle, but more expensive.

For some chemicals that may cause precipitants or crystals to form in the pumps and piping, a flushing water system is also recommended.

The amount of carrier water used to convey a chemical is not necessarily important. However, a flushing velocity in the piping of 2 to 5 feet per second is desirable.

Chemicals are metered in its neat form with the dose dependent on the plant flow rate and the amount of chemical fed, not the amount of carrying water used.