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There is a problem in some AguaClara water treatment plants with flocs floating to the surface of the water in sedimentation tanks. One hypothesis is that the water entering the sedimentation tank is supersaturated, and because total dissolved gas pressure is greater than the local solution pressure, gas comes out of solution and forms bubbles. The bubbles form on floc particles and bring them to the surface, causing the flocs to float instead of settling to the bottom of tank. Thus flocs Since flocs are swept out with the "clean" water and escape the sedimentation tanks, polluting they eventually pollute the effluent water and degrading . As a result, the quality of the drinking water produced by the plant is degraded. One solution may be to send the water through a sand filter before it enters the sedimentation tanks to remove excess gas in the water, thereby preventing bubble formation on flocs.

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