400 gallon project

[untamed]

Here are the results of my Kalk reactor testing:

I tested the pH of the fluid in the top of the reactor. For this first reading, it has been almost 48 hours since the last 7 second mix cycle. The entire column is clear liquid except for 1cm of undissolved Kalk on the bottom. pH = 11.59

I then allowed the reactor to mix for 7 seconds. This caused the column to "milk" to a level of about 1/2 way up the reactor. I measured the clear liquid at the top of the column again. pH = 11.63

I then allowed the reactor to mix for about 2 minutes. Interestingly, the column of "milk" only reached a height slightly above the pump intake...maybe 2/3 of the total height of the reactor. It seems that no matter how long you run the pump, the topmost part of the reactor will never get cloudy. Again, I measured the liquid at the top of the column. pH = 11.64

My conclusion is that the pH of the liquid being delivered to the tank has not significantly changed even 48 hours after even a 7 second mix. Nor does it significantly change immediately after mixing for several minutes. This actually has made me consider that even 7 seconds every 2 days is more than adequate.

However, the amount of FW that I am pushing through the reactor per day is still very small. It may be possible that pushing MORE FW through the reactor could dilute the clear Kalk between mixing cycles. As I increase the flow through the reactor, I will repeat the experiment.