*** This version of Confluence is for testing only and contains a copy of content from June 29th 2026. No changes will be preserved. ***
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| Amount of water | Amount stock added | Stock concentration |
| Liter | gram | g/L |
Clay | 11 | 22.2 | 2.02 |
Alum | 11 | 16.5 | 1.5 |
Humic acid |
| 0.375 | 3.5 mg/L |
Process Controller
Troubleshooting
What to do if you don't see any flocs forming in the settling tube?
*Always check tube connections and make sure there is no clogging in the connections.
*Check the stock solutions. Make sure that there is no sedimentation occurring in clay and alum stock solutions.
*Check the influent turbidimeter. If it displays lower turbidity, then check the clay and alum stock solutions. Check if the flow coming out of the pumps. Check clay/alum flowrates with timer and graduated cylinder. Change in the process controller so that it will give correct value of clay/alum.
*Check bubbles in the floc and settling tubes, especially at the influent of the settling tube. Flocs could get trapped in the bubbles.